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10th International LS-DYNA Conference

2D to 3D ALE Mapping
Nicolas Aquelet - Livermore Software Technology Corporation
Mhamed Souli - Laboratoire de Mecanique de Lille
A 2D MMALE (Multi-Material Arbitrary Lagrange Euler) code was implemented in LS-DYNA®. Like the 3D MMALE already available each 2D computational cycle is divided in two steps. First a multi-material version of the two-dimensional shell formulations solves the physical problem on quadrangle meshes during the Lagrangian step. The 2D shell formulations are plane strain and area-weighted axisymmetric. An advection step adapted to the 2D shell ...
10th International LS-DYNA® Users Conference 2008
 
18 Wheel Truck Dynamic and Durability Analysis using Virtual Proving Ground
Ramesh Edara, Shan Shih - ArvinMeritor Inc.
Nasser Tamini, Tim Palmer, Arthur Tang - Engineering Technology Associates
Virtual proving ground (VPG) simulations have been popular with passenger vehicles. VPG uses LS-DYNA® based non-linear contact Finite Element analysis (FEA) to estimate fully analytical road loads and to predict structural components durability with PG road surfaces and tire represented as Finite elements. Heavy vehicle industry has not used these tools extensively in the past due to the complexity of heavy vehicle systems and especially due ...
A Cyclic Damaged Plasticity Model: Implementation and Applications
Yuli Huang, Stephen A. Mahin - University of California at Berkeley
In analysis and design of structures subjected to earthquakes, the cyclic and dynamic nature of the response leads to complications. Material models need to account for cyclic plasticity, including deterioration and eventual failure due to low-cycle fatigue. A cyclic damage plasticity model MAT_DAMAGE_3 (MAT_153, LSTC 2007) is implemented to combine Armstrong-Frederick/Chaboche nonlinear kinematic hardening, isotropic hardening, and Lemaitre ...
A Finite Element Analysis of Mid-Shaft Femoral Tolerance under Combined Axial-Bending Loading
Costin Untaroiu, Dan Genovese, Johan Ivarsson, Jeff Crandall - University of Virginia
Bone fractures occur frequently at mid-shaft femoral site during frontal and offset automotive crashes. Because these injuries are expensive, it is crucial to understand the injury mechanisms if this injury is to be prevented. The experimental investigation of femoral shaft tolerance under loading corresponding to real world accidents requires a challenging test setup that allows applying external loads in controlled conditions, mimics the ...
A Heterogeneous Constitutive Model for Reinforced Carbon-Carbon using LS-DYNA
Kelly S. Carney, Robert K. Goldberg, J. Michael Pereira - NASA Glenn Research Center, USA
Ryan S. Lee, Jeremie J. Albert - The Boeing Company
Reinforced Carbon-Carbon (RCC) is a ceramic matrix, coated C/C composite used in the Space Shuttle’s thermal protection system. A constitutive model for RCC is presented that separates the coating and substrate within a multi-material shell element allowing for bending strains to be accurately computed during a finite element analysis. Version 971 of LS-DYNA contains a new shell element formulation that allows for different ...
A Numerical Investigation for Rock Fall Impact Behavior of Pithead of Tunnel with Falling Weight Impact Loading
Abdul Qadir Bhatti, Khaliq U Rehman Shad - National University of Sciences & Technology NUST, Pakistan
Norimitsu Kishi - Muroran Institute of Technology, Muroran
In order to establish a rational impact resistant design procedure for Arch type rock-shelter based on not only allowable stress design but also on ultimate state design and/or performance based design method, impact resistant capacity and/or maximum input impact energy for the RC structures must be clearly estimated. At present, the RC structures have been designed statically based on allowable stress design method. Here, maximum input ...
A Review of Sixteen Years of LS-DYNA® Application in Stamping Manufacturing Engineering at Chrysler, LLC
Yang Hu, Changqing Du and Shyam Kariat - Chrysler, LLC
Li Zhang - Livermore Software Technology Corporation
 
A Simple Global/Local Approach to Modeling Ballistic Impact onto Woven Fabrics
M. P. Rao, M. Keefe - University of Delaware, Newark
B. M. Powers, T. A. Bogetti - United States Army Research Laboratory, Aberdeen Proving Ground
The objective of this study is to develop and demonstrate the feasibility of an LS-DYNA® Global/Local model for studying the non-linear mechanics of woven fabrics under ballistic impact. The presented approach is built on the observed response of fabrics in experimental studies performed at the Army Research Laboratory (ARL). In particular, two-layer test patches of 600 denier Kevlar KM2® fabrics are modeled with the aim of ...
A Smoothed-Particle Hydrodynamics (SPH) Model for Machining of 1100 Aluminum
S. S. Akarca, W. J. Altenhof, A.T. Alpas - University of Windsor
The smoothed-particle hydrodynamics (SPH) technique was used to model experimentally observed large deformation behaviour of aluminum (1100 Al) during machining. The effectiveness of the SPH method in predicting the response of the 1100 Al workpiece during orthogonal machining has been assessed through a careful comparison with the experimentally measured stress/strain distribution within the chips formed during steady state cutting. An ...
A Study of Quasi-static Problem by SPH Method
Tatsuo Sakakibara, Toru Tsuda, Ryo Ohtagaki - ITOCHU Techno-Solutions Corporation
The SPH method is well known for the hydrodynamics and recently SPH is applied for the impact and the penetration behavior into solid materials. SPH is completely mesh free so that it seems to be appropriate to simulate crash behaviors of concrete and rock materials. However, the applicability and the effects of the parameter of SPH for quasi-static problems are not clear completely. In this paper, in order to verify the applicability and ...
An Implicit Incompressible CFD Solver in LS-DYNA for Fluid-Structure Interaction Problems
Facundo Del Pin - Livermore Software Technology Corporation
The present work is an introduction to a new CFD solver in LS-DYNA®. This solver is part of the efforts put in LS- DYNA with the objective to expand the capabilities into new challenging problems in industry. The new CFD solver will focus on fluid-structure interaction (FSI) applications where incompressible fluids interact with the existing structures in LS-DYNA. Incompressible flows are present in a great variety of industrial applications ...
Application of Scrap Shedding Simulation in Stamping Manufacturing
Diane Xu - Ford Motor Company
Jim Kosek - Engineering Technology Associates, Inc.
One of the most critical issues in stamping manufacturing today is the successful shedding of scrap from limited trim dies. Until recently, die tryout was the first opportunity to check the shed scrap feasibility of a trim die. The newly developed scrap shed analytical module can be used for analyzing trim die scrap shed feasibility before die creation. It simulates Scrap shedding during or after the die is designed using Dynaform and ...
Application of the SPH Method for Simulation of Aerospace Structures under Impact Loading
M-A Lavoie, A. Gakwaya1 - Laval University, Cité Universitaire, Quebec, Canada
M. Nejad Ensan - National Research Council, Ottawa, Ont. Canada.
The SPH method is applied in industrial level problems as encountered for example in studies related to bird impact on composite aircraft structures. This paper first demonstrates the accuracy of the method for bird impact on rigid target modeling and then applies the developed model to a more complex problem, namely the secondary bird impact.
Assessing the Convergence Properties of NSGA-II for Direct Crashworthiness Optimization
Guangye Li - IBM Deep Computing Group, Houston TX
Tushar Goel, Nielen Stander - Livermore Software Technology Corporation
The elitist non-dominated sorting genetic algorithm (NSGA-II) converges to the Pareto optimal front (POF) if a sufficient number of function evaluations are allowed. However, for expensive problems involving crash simulations, only a limited number of simulations might be affordable. It is observed that initially there are significant advances towards the POF but as the population matures, the improvements are relatively small. This means ...
Assessment of Automotive Panel to Meet Handling Load Requirements: CAE Simulation
Harihar Kulkarni, John M. Eidt - Ford Motor Company
Dharmveer Podhuturi, Akbar Farahani - Engineering Technology Associates, Inc.
Material handling of sheet-metal components within the plant or one plant to the other significantly impacts quality and assembly process. Any permanent deformation of sheet metal component contributes to poor quality of an automotive subassembly. One way is to minimize occurrence of unacceptable deformation is to follow trial and error approach. However, such approach is time consuming during launch; in addition cost of stamping and ...
Automating Oasys PRIMER and Oasys D3PLOT using JavaScript
Miles Thornton - Arup
Oasys PRIMER and Oasys D3PLOT now contain JavaScript interpreters. Adding a scripting engine allows the user to automate both pre and post processing tasks. Extensions to the core JavaScript language allow the user to interact with the programs, create and/or manipulate data, create user interfaces, read and write files and extend the functionality of PRIMER and D3PLOT. The syntax is quick and easy to learn. There are several advantages in ...
Benchmark Study on the AIRBAG_PARTICLE Method for Out-Of-Position Applications
Wenyu Lian - General Motors
Dilip Bhalsod - Livermore Software Technology Corporation
Lars Olovsson - IMPETUS Afea
The demands for developing safety restraint systems that perform well under Out-Of-Position (OOP) conditions have increased significantly in recent years. At the same time, the development of simulation capabilities for OOP have made progress in most major crash/safety software, such as the coupled Lagrangian-Eulerian approach (here referred to as AIRBAG_ALE) in LS-DYNA® by LSTC. Similar technologies are applied in MSC-Dytran by MSC ...
Comparison Between Experimental and Numerical Results of Electromagnetic Forming Processes
José Imbert, Michael Worswick - University of Waterloo, Canada
Pierre L’eplattenie - LSTC, Livermore, USA
Electromagnetic Forming (EMF) is a high speed metal forming process that is being studied with interest in both academia and industry as a way of improving existing sheet metal forming. The main thrust of the published research has been increasing the formability of aluminum alloys. Observing and measuring EMF process is made very difficult by the high speeds involved and the tooling used to obtain the final shapes. As with many ...
Comparison of ALE and SPH Simulations of Vertical Drop Tests of a Composite Fuselage Section into Water
Karen E. Jackson, Yvonne T. Fuchs - NASA Langley Research Center Hampton
Simulation of multi-terrain impact has been identified as an important research area for improved prediction of rotorcraft crashworthiness within the NASA Subsonic Rotary Wing Aeronautics Program on Rotorcraft Crashworthiness. As part of this effort, two vertical drop tests were conducted of a 5-ft-diameter composite fuselage section into water. For the first test, the fuselage section was impacted in a baseline configuration without ...
Comparison of Analytical and Numerical Results in Modal Analysis of Multispan Continuous Beams with LS-DYNA
Abhijit Mahapatra, Avik Chatterjee - Central Mechanical Engineering Research Institute, India
This paper deals with the study of natural frequencies of vibration of continuous beams supported on hinged end supports with and without overhang. The paper illustrates the analytical formulation of the natural frequencies and corresponding modes of a n-span continuous beam by using a general solution for the Euler-Bernoulli differential equation. Using two different approaches, namely the analytical method and the numerical method some ...
Comparison of Hybrid III Rigid Body Dummy Models
Stephen Kang, Paul Xiao - Ford Motor Company
Hybrid III Dummy Computer Aided Engineering (CAE) models have long been used for aspects of vehicle design, including vehicle structure and restraint systems to meet regulatory safety rating targets and internal company requirements. The quality and run time of these CAE models in simulating physical dummies directly affects the usefulness of CAE tools in vehicle development. The objective of this study is to compare the responses of the ...
Concepts toTake Elastic Tool Deformations in Sheet Metal Forming into Account
A. Haufe, D. Lorenz - DYNAmore GmbH, Germany
K. Roll, P. Bogon - Daimler AG, Germany
In recent years the development of more and more niche products, i.e. cars with different external appearance, has become a remarkable trend in the automotive industry. This trend, however, generates higher costs for individual tooling geometries that are traditionally made as stiff as possible. A second trend is the increasing use of high and ultrahigh strength steel grades for bodies in white. Here too the design philosophy for the tools in ...
Coupling FE Software through Adapter Elements: A Novel Use of User-Defined Elements
Yuli Huang, Andreas Schellenberg, Stephen A. Mahin, Gregory L. Fenves - University of California at Berkeley
An adapter element provides a versatile and computationally efficient method for coupling several finite element (FE) analysis programs so that the unique modeling and analysis capabilities of each can be utilized simultaneously in the simulation of a complete system. FE software is coupled by (1) using each software's programming interface to embed an adaptor element, and (2) connecting the adapter elements using OpenFresco (Open-source ...
Development of an Airbag Landing System for the Orion Crew Module
Benjamin Tutt - Airborne Systems
R. Keith Johnson, Karen Lyle - NASA Langley Research Center
Airborne Systems (formally Irvin Aerospace Inc) has developed an Airbag Landing System design for the Orion Crew Module of the Crew Exploration Vehicle. This work is in support of the NASA Langley Research Center Landing System Advanced Development Project. Orion is part of the Constellation Program to send human explorers back to the moon, and then onwards to Mars and other destinations in the Solar System. A component of the Vision for ...
Development of Finite Element Models of Restraint System for Injury Analysis in Side Impact
Satoshi Fukushima, Koushi Kumagai, Tsuyoshi Yasuki - Toyota Motor Corporation
Yoshiharu Sonoda, Yu Setoyama - Toyota Technical Development Corporation
The use of occupant protection simulation by finite element model is increasing for vehicle development. Finite element models of moving deformable barrier honeycomb, vehicle body, dummy, and restraint system have been developed to predict the dummy injury values. To more accurately predict the dummy injury indices in side impact analysis, this paper describes the improvement of finite element models of restraint system such as torso airbag ...
Direct Multi-objective Optimization through LS-OPT® using Small Number of Crashworthiness Simulations
Tushar Goel, Nielen Stander - Livermore Software Technology Corporation
Yih-Yih Lin - HP
Genetic algorithms typically require a large number of simulations, which would be economically prohibitive for crash simulations without the advent of today’s cost-effective multi-core computers. A study is conducted to seek improvements while restricting the number of simulations and exploiting the ability to use parallelization. The parallelization, achieved by simultaneously running multiple simulations for each GA generation on a HP ...
Drop Analysis of Waste Transfer Flask
Suresh Babu, Jayanta Biswas - Atomic Energy of Canada Limited
The present paper describes the drop analyses performed on a waste transfer flask using LS-DYNA® finite element software. Radioactive waste generated during retubing of CANDU®6 reactors are placed in waste containers. Waste transfer flasks are used to transfer waste containers from the reactor building to storage structures. The waste transfer flask is a complex mechanical assembly made of double wall steel shells filled with lead. At the ...
Effect of Material Characteristics on Wrinkling During Dome Forming of a Beverage Can using LS-DYNA
R.E. Dick, J.W. Yoon -Alcoa Technical Center, USA
Wrinkling of thin sheet metal products such as beverage cans continues to be experienced by can manufacturers and is observed with some aluminum material suppliers more than others. These wrinkles are caused by compressive instabilities during forming, and with small base diameter cans and light gauge material, the likelihood of this wrinkle formation increases. Manufacturing experience suggests that dome wrinkling is influenced by many ...
FE-Application in Aircraft Structure Analysis
Dr.-Ing. Matthias Hörmann - CADFEM GmbH, Germany
 
Finite Element Modeling of Preloaded Bolt Under Static Three-Point Bending Load
Ken-An Lou, William Perciballi - ArmorWorks
The objective of this project was to develop innovative lightweight mine-protected fasteners for blast protection appliqués. Blast protection appliqués are used on tactical and combat ground vehicles as a method of deflecting or mitigating the effects of anti-vehicular mine blasts or attack by Improvised Explosive Devices (IEDs). A critical and weakest component of these appliqués is the fastener joints. Currently, industrial bolts are ...
Finite Element Simulation using SPH Particles as Loading on Typical Light Armoured Vehicles
Geneviève Toussaint, Robert Durocher - Defence Research and Development Canada – Valcartier
Light Armoured Vehicles (LAV) are essential to transport troops and equipment in combat and high risk zones. The emergence of non conventional threats such as Improvised Explosive Devices (IED) implies a need to reassess armoured vehicle design to improve crew survivability. To do this DRDC has been developing new experimental facilities and has conducted experimental testing to study armoured vehicle structure subjected to near field ...
Forging and Extrusion Analysis with LS-DYNA® using 3D Adaptive EFG Method
Hongsheng Lu, C. T. Wu, Jingxiao Xu - Livermore Software Technology Corporation
With the recent improvements in adaptive procedure, adaptive mesh-free method has become an important tool to solve the 3D forging and extrusion problems that usually involve large topology change with severe local deformation. In this paper, the implicit version of 3D adaptive EFG method with emphases on the state variable transfer between successive discretizations is presented, and several problems are used to illustrate the ...
Gas Dynamic Simulation of Curtain Airbag Deployment through Interior Trims
Bill Feng, David Coleman - Jaguar Cars and Land Rover
The curtain airbag is usually simulated by a uniform pressure method in which the pressure of the airbag is considered as constant. This is correct when the airbag is fully deployed. However, this assumption is not valid during the curtain airbag deployment phase, where the gas flow passing through each chamber can be clearly seen. Therefore it is impossible to simulate the intermediate sequences of the airbag deployment correctly by using ...
Ideas on Applying Very Fine Models in Dummy Model Development
Uli Franz, Alexander Gromer, Jens Zschieschack - DYNAmore GmbH
Matthias Walz - Mercedes Car Group, Daimler AG
Yupeng Huang - Sunrise Auto Safety Technology
Very fine models allow investigating the behavior of dummies with high accuracy. Even if ele- ment numbers for a dummy model above 3 Million elements are currently not suitable for stan- dard simulation in vehicle development, the usage of such models contribute to the development of coarser dummy models. Due to the detailed representation physical effects occurring can be captured very realistically with the very fine models. The paper ...
Influence of Element Formulation on the Axial Crushing of Thin-walled Dual-phase Steel Square Sections
Venkatapathi Tarigopula, Magnus Langseth, Odd Sture Hopperstad - Norwegian University of Science and Technology
This paper presents a systematic numerical investigation of the influence of element formulation on the force- deformation characteristics and crush behaviour of thin-walled dual-phase steel square tubes subjected to axial loading. Influence of shell and volume elements were verified on the crush behaviour. Finite element models square sections were created and analysed using the non-linear explicit finite element code LS-DYNA®. Parameters ...
Influence of Selection Criterion on the RBF Topology Selection for Crashworthiness Optimization
Tushar Goel, Nielen Stander - Livermore Software Technology Corporation
Meta-models are frequently used to offset high computational cost of crashworthiness optimization problems. Radial basis function based meta-models are gaining popularity among various meta-modeling techniques due to their ability to approximate non-linear responses with relatively low fitting cost. However, the performance of RBF networks is very sensitive to the choice of topology. In this paper, the influence of three selection criteria ...
Influence of the Coupling Strategy in the Numerical Simulation of Electromagnetic Sheet Metal Forming
Ibai Ulacia, Iñaki Hurtado - University of Mondragon
José Imbert, Michael J. Worswic - University of Waterloo, Canada
Pierre L’Eplattenier - Livermore Software Technology Corporation, USA
In this paper the Electromagnetic Forming process is numerically analyzed using a novel method that is being implemented into the commercial LS-DYNA® code. The method consists on a combination of a Boundary Element Method (BEM) and a Finite Element Method (FEM) formulations to compute the electromagnetic analysis. The main advantage of using BEM is that the air is not meshed avoiding the related problems and making it easier to couple the ...
Influence of the Residual Welding Phenomena on the Dynamic Properties of a Two-Meter Long Tube with 64 Non-Symmetrical Brackets Welded on a Helical Path
S.V. Medvedev, M.V. Petrushina, O.P. Tchij - United Institute of Informatics Problems NAS of Belarus
Welded elements of a two meter long tube is considered. The welded structure rotates with 100rad/sec. The non- symmetrical brackets are connected to the tube through by the welds of a curved trajectory that consists of circumferential parts and arbitrary curved part on a shaft surface and disposed on the tube in a helical sequence. The objective of the study was to explore the axis and hoop stress distribution on the shaft tube and its ...
Intel Cluster Ready Support for LS-DYNA®/MPP
Tim Prince - Intel Corporation
The Intel Cluster Ready program enables LS DYNA/MPP users to buy, install, and use clusters more effectively. It includes a joint Intel and cluster supplier certification process to ensure the cluster the LS-DYNA user purchases is designed and built to specification. Intel supplied software tools support verification of initial and ongoing operation and performance of the cluster.
LS-DYNA Performance Improvements with Multi-Rail MPI on SGI Altix ICE Clusters
Olivier Schreiber, Michael Raymond, Srinivas Kodiyalam - SGI
Multi-Rail networks can improve MPI communication performance by distributing the communication traffic to multiple independent networks (rails). Messages are divided into several chunks and sent out simultaneously using multiple rails. With the dual plane network topology of SGI Altix ICE clusters, MPI communication can hence utilize both the InfiniBand rails, including, ib0 and ib1 fabrics. The performance gains achievable with LS-DYNA ...
LS-DYNA® Impact Model Build-up: Process Automation With ANSA Data Management and Task Manager
I. Makropoulou, Y. Kolokythas, L. Rorris - BETA CAE Systems S.A., Greece
In the presently CAE-driven vehicle design process a great number of discipline models must be built and analyzed for the validation of a new vehicle model design. The increasing number of vehicle model variants further increases the number of the load-cases that must be studied. This process introduces a great amount of disparate data that need to be handled by the CAE teams. However, due to the multiple sources and the diversity of the CAE ...
LS-DYNA® Impact Simulation of Composite Sandwich Structures with Balsa Wood Core
L. J. Deka, U. K. Vaidya - The University of Alabama at Birmingham
The impact damage response of balsa core sandwich composite plates with S2-glass/ epoxy reinforced facesheets is evaluated by impacting them with a spherical steel projectile at single impact locations. The impact damage can significantly reduce the structural integrity and load bearing capacity of a composite structure. Under high velocity impact loading, laminated composites experience significant damage causing fiber breakage, matrix ...
Material Constitutive Parameter Identification using an Electromagnetic Ring Expansion Experiment Coupled with LS-DYNA® and LS-OPT®
Ismael Henchi, Pierre L’eplattenier, Nielen Stander - LSTC
Glenn Daehn, Yuan Zhang, Anupam Vivek - The Ohio State University
In this paper, a parameter identification procedure to obtain the constitutive properties of metals at high strain rate and high temperature is presented. This procedure uses experimental results from electromagnetic ring expansions, coupled with LS-DYNA® simulations using the newly developed electromagnetism module, driven by LS-OPT®. The experiments were performed at The Ohio State University and the expansion velocities of the ring were ...
Metal Forming Applications using Implicit Mechanics Features of LS-DYNA
Roger G. Grimes, Xinhai Zhu - Livermore Software Technology Corporation
The authors will present the use of LS-DYNA for a variety of metal forming applications. They will present some new features and improvements in Version 971 of LS-DYNA such as Inertia Relief and Contact Penetration Detection. The presentation will include applications of gravity loading, binder wrap, flanging, springback and die transfer.
Metamodel Sensitivity to Sampling Strategies: A Crashworthiness Design Study
Nielen Stander, Tushar Goel - Livermore Software Technology Corporation
A study is conducted to determine the sensitivity of 2 topologically distinct metamodel types to variations in the experimental design brought about by sequential adaptive sampling strategies. The study focuses on examples encountered in crashworthiness design. Three sampling strategies are considered for updating the experimental designs, namely (i) a single stage approach, (ii) a sequential approach and (iii) a sequential approach, but ...
Modeling and Simulation of Bogie Impacts on Concrete Bridge Rails using LS-DYNA
Akram Abu-Odeh - Texas Transportation Institute
Bridge rails are constructed to contain and redirect an errant vehicle. They are constructed to withstand the impact severity of such vehicular impact based on the desired containment level. To evaluate the structural integrity of a given bridge rail design, bogie tests were conducted using a 5000 lb bogie as an impactor. In this paper, LS-DYNA was used to model the concrete barrier to simulate the bogie impact. Three material models in ...
Modeling High Speed Machining with the SPH Method
C. Espinosa, M. Salaun,C. Mabru,R. Chieragatti - Université de Toulouse, France
J.L. Lacome - LSTC, USA
J. Limido IMPETUS Afea, France
The purpose of this work is to evaluate the use of the Smoothed Particle Hydrodynamics (SPH) Method within the framework of modeling high speed cutting. First, a 2D SPH based model is carried out using the LS-DYNA® software. SPH is a meshless method, thus large material distortions that occur in the cutting problem are easily managed and SPH contact control allows a “natural” work piece/chip separation. The developed SPH model proves its ...
Modeling Rebound of Foam Backed Racetrack Barriers
John D. Reid, Robert W. Bielenberg - University of Nebraska-Lincoln
Modeling energy absorbing foams that restore back to their original shape can be extremely challenging, especially when the foam is crushed over 90%. However, the foam used in the SAFER racetrack barrier does indeed nearly return to its’ original shape after severe crushing. The desire to model this behavior led to the use of the Fu Chang foam model available in LS-DYNA .
Modeling Self-Piercing Riveted Joint Failures in Automotive Crash Structures
P.K.C. Wood, C. A. Schley - University of Warwick, England
M. Buckley - Jaguar and Land Rover, England
B. Walker, Ove - Arup and Partners, England
T. Dutton - Dutton Simulation, England
This paper describes a new model and method to predict Self-Piercing Riveted (SPR) joint interlock failures in aluminium sheet at crash speeds using explicit finite element simulation. SPR interlock failure is dependent on rivet direction, which is included in the model. A mesh independent approach is adopted for connection model which is capable of industrial application at the full vehicle crash analysis level. The paper provides an ...