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Current and future developments of LS-DYNA I
Dr. Hallquist J. O. - Livermore Software Technology Corp.
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LSTC’s Perspective on the future Version 970 status Recent developments for crash Arbitrary Lagrangian-Eulerian Developments Implicit Developments EFG (Mesh-free) Developments MPP Outlook
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Recent New Developments in Contact Mechanics
P. Wriggers, K. Fischer - University of Hanover
A. Rieger - Continental AG
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During the last years considerable effort was devoted to better numerical treatment of contact problems. This fact is due to the growing computing power which lead to more and more sophistication and detailed technical models within engineering analysis. Due to the more precise modelling within the associated discretization process often unilateral constraints have to be considered. Hence better discretization techniques, especially for finite ...
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CAE Simulations for Passive Safety focused on the Porsche Cayenne - the Transition to New Technologies
Erich Schelkle, Herbert Klamser - Dr. Ing. h.c. F. Porsche AG
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Simulation technologies are methods which have been traditionally applied in automotive engineering for a long time. Over the decades, enormous progress has been achieved in both, the simulation methods and the CAE-programs used. Thanks to the high efficiency levels of the current computer generation and the use of economically priced commercially available hardware such methods are being applied on a widespread basis today. Visionary concepts ...
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How to Develop a Five Star Car by using LS-DYNA
R. Malcusson - Saab Automobile AB
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LS-DYNA Applications in Shipbuilding
Hervé Le Sourne, Nicolas Couty, François Besnier - Principa Marine, France
Cyrille Kammerer, Hervé Legavre - DCN Ingénierie, France
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Ship and submarine structures have long been studied thanks to finite element methods. Their large dimension and complexity, the coupling with heavy fluid and the presence of a free surface raise numerical problems on the field of dynamic analysis. This is particularly true for extreme or accidental situations such as collision and grounding, underwater explosion and severe fluid impact. This paper describes first numerical methods and tools ...
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Implicit Functionality in LS-DYNA v970
Dr. B. Maker, Dr. R. Grimes, Dr. C. Ashcraft - Livermore Software Technology Corp.
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The Development of the new XJ Jaguar in Advanced Aluminium; Opportunities and Challenges
Zeguer, T. - Jaguar Cars
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Current and future developments of LS-DYNA II
Dr. Hallquist J. O. - Livermore Software Technology Corp.
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Consideration of Manufacturing Effects to Improve Crash Simulation Accuracy
Curd-Sigmund Böttcher, Steffen Frik - Adam Opel AG
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The confidence level of crash simulations is mainly determined by a well-defined finite element representation of the vehicle structure, correct modelling of the kinematics, and the material properties being applied. In the past, materials were described by quasistatic – or, if available – dynamic stress-strain characteristics. Besides this, each sheet metal part was assumed to have a uniform gage and material characteristics. However, it is a ...
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Integration of Simulation in the Development Process
J. Brockmann - Faurecia Autositze GmbH & Co. KG
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Safety Analysis of the New Actros Megaspace Cabin According to ECE-R29/02
Horst Raich - DaimlerChrysler AG
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During the development of truck cabins the safety of the driver and the front seat passenger in an accident is considered. The cab must be designed in such a way that in an accident a sufficient survival space is guaranteed. The legal requirements of cabin safety are fixed in Europe in the regulation ECE-R29. In order to reduce the number of iteration loops during the development process, a computational simulation method for the load cases roof ...
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The Evaluation of Crashworthiness of Vehicles with Forming Effect
Hyunsup Kim, Sungoh Hong, Seokgil Hong - KIA Motors
Hoon Huh - Korean Institute of Science and Technology, Korea
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This paper is concerned with a crash analysis for vehicle structures considering forming effects. The properties of formed vehicle structures have been effected and changed by such as work hardening, non-uniform thickness distribution resulted from the forming process. The crash analysis of vehicle structures with the forming effects leads to different results from those without such effects. In this study, the forming effects of the front side ...
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Validation Simulation of New Railway Rolling Stock Using the Finite Element Method
Martin Wilson, Ben Ricketts
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Bombardier Transportation is the largest manufacturer of rail vehicles in the world. The current product portfolio includes a wide variety of vehicles from low speed ‘people movers’ through to high speed inter-city trains. Bombardier offers products in every sector of the passenger rail equipment market and therefore is required to meet a number of national and international crash safety requirements. These requirements range from simple static ...
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Strength Analysis of Seat Belt Anchorage According to ECE R14 and FMVSS
Klaus Hessenberger - DaimlerChrysler AG
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To guarantee proper function of the seat belt system, belt anchorages have to resist defined static test loads that represent an vehicular impact. ECE R14 and FMVSS210 are tests to ensure sufficient strength of all anchorage points. In these tests high forces are applied to the seatbelts over loading devices. All components of the sytems, namely seats, seat and belt anchorages have to resist the defined loads without damage. The loads are ...
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Improving the Roadside Safety with Computational Simulations
Matej Vesenjak, Zoran Ren - University of Maribor
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The road restraint systems on public streets are used to prevent a vehicle to veer off the road or its breakthrough to the opposite side of the road. The road restraint systems designed according to the EN 1317 standard are intended to provide certifiable levels of vehicle containment, to redirect errant vehicles and to provide guidance for pedestrians and other road users. Its proper design is therefore crucially important for safety of all ...
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Simulation of a Vehicle Running on to a Curb by Using Tire and Vehicle FE Models
Tatsuya Fukushima,
Hitoshi Shimonishi - NISSAN MOTOR CO.,LTD
Kimihiro Hayashi - The Japan Research Institute, Limited
Masaki Shiraishi - SUMITOMO RUBBER INDUSTRIES, LTD
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A simplified FE tire model has capability to solve a large deformation of a tire on a vehicle running simulation with acceptable computational time. We tried to simulate a vehicle running on to a curb, one of vehicle strength tests, by using simplified FE tire models and a vehicle FE model which has detailed suspension models. It is necessary to solve the force to a wheel with good agreement with a car test, in order to estimate the force to ...
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Reasons for Scatter in Crash Simulation Results
Clemens-August Thole, Liquan Mei - Fraunhofer Institute for Algorithms and Scientific Computing
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In crash simulation, small changes of the model or boundary conditions may result in substantial changes of the simulation results. For a BMW car model, the node positions of the crashed model show differences of up to 14 cm between several executions on a parallel machine for the same input deck. For the Dodge Neon testcase, small variations of the barrier position result in substantial scatter of the intrusion. Detailed investigations of ...
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LS- Dyna on MPP Platforms, Experiences and Practical Recommendations
Rainer Emrich, Udo Jankowski - Tecosim GmbH
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LS-DYNA on Linux-Clusters at EDAG Use Case
John U.S. Hanlon - EDAG Engineering & Design AG
Bernward Platz - Teraport GmbH
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At EDAG, the increasing demand for crash simulations with LS-DYNA required the expansion of the existing compute resources in the beginning of 2002. As at this point there was a stable and performant MPP-version of LS-DYNA available, EDAG decided - despite of the new technology - to purchase a Linux-cluster consisting of 8 nodes and 16 processors. Meanwhile EDAG has deployed over 14 clusters at three different locations. Whereas at the ...
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Impact Performance of Flexible Guardrail Systems using LS-DYNA
Khaled Sennah - Ryerson University
Magdy Samaan - University of Windsor
Ahmed Elmarakbi - University of Toronto
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Recent advances in THUMS : development of individual internal organs, brain, small female, and pedestrian model
Masami Iwamoto, Kiyoshi Omori, Hideyuki Kimpara, Yuko Nakahira, Atsutaka Tamura, Isao Watanabe, Kazuo Miki - Toyota Central R&D Labs., Inc.,
Junji Hasegawa - Toyota Motor Corporation
Fuminori Oshita - The Japan Research Institute, Ltd.
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A finite element model of total human model for safety, which is called THUMS, has been developed in order to study human body responses for impact loads. In previous report, a mid-size adult male occupant model of THUMS was developed and validated for several impact loads. This paper briefly describes recent advances in THUMS. Individual internal organ models and a detailed brain model have been developed to be integrated with the occupant ...
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FTSS FEA Dummy Models update: SID-IIs Small Side Impact Dummy Model and others
Fuchun Zhu, York Huang - First Technology Safety Systems, Inc.
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SID-IIs, the small side impact dummy, is the smallest side impact crash test dummy currently available in the market, representing the anthropometry of a small female or a thirteen-year-old child. It is designed specifically to evaluate the performance of advanced occupant protection systems, such as side air bags, in automotive side impact situations. This paper presents the development and validation of new FTSS SID-IIs dummy model for LS-Dyna ...
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Development of a 50th Percentile Hybrid III Dummy Model
Cing-Dao (Steve) Kan, Dhafer Marzougui, Nabih E. Bedewi - The George Washington University
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Due to significant improvements in computer technology and finite element (FE) code capabilities, it has become more feasible and effective to incorporate occupant models in the analysis and evaluation of vehicle crashworthiness and safety. Using Detailed FE models that incorporate the vehicle, restrains systems, and occupants, in automotive safety analyses have shown advantages over the traditional methods where the vehicle and occupants are ...
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FAT SIDE IMPACT DUMMY MODLES REMARKS ON USAGE AND POTENTIAL PITFALLS
Ulrich Franz, Peter Schuster, Werner Schmid, Oliver Graf - DYNAmore GmbH
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Detailed finite element side impact dummy models of the USSID, EUROSID, and ES-2 have been developed in cooperation with the German Association for Automotive Research (FAT) during the last 5 years. All models are validated using tests at material and component levels as well as fully assembled models. The models are used by nearly all car manufacturers worldwide who use LS-DYNA for occupant safety simulations. The paper describes modeling ...
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Development and Validation of Numerical Pedestrian Impactor Models
Thomas Frank - Daimler Chrysler AG
Artur Kurz - LASSO Ingenieurgesellschaft mbH
Martin Pitzer - PENG GmbH
Michael Söllner - Porsche AG
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Crash Simulation in Pedestrian Protection
Susanne Dörr, Hartmut Chladek, Armin Huß - Ingenieurbüro Huß & Feickert
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Finite Element Models for European Testing: Finite Element Models for European Testing: Side Impact Barrier to WG13 Pedestrian Impactors to WG17
Trevor Dutton - Arup Solihull, UK
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Simulation of proposed FMVSS 202 using LS-DYNA Implicit
Vikas Patwardhan, Babushankar Sambamoorthy, Tuhin Halder - Lear Corporation
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Federal Motor Vehicle Safety Standard 202 applies to automotive seat head restraints, and their attachment assemblies. The regulation is aimed at reducing the frequency and severity of neck injuries due to huge forces resulting from vehicle crashes. The main objective of this paper is to discuss the LS-DYNA IMPLICIT code vis-à-vis the simulation of the proposed FMVSS 202 regulation. The proposed changes to the FMVSS 202 standard incorporates a ...
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Biomechanical analysis of whiplash injuries; women are not scaled down men
Mordaka J., Gentle C. R. - Nottingham Trent University
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Whiplash is the most common soft tissue injury sustained in car accidents. The term is commonly associated with hyperextension of the neck as the head rotates backwards in rear end collisions but the exact injury mechanism is not fully understood because the neck is an anatomically and mechanically complex structure. Experimental studies of the mechanism of injury are limited by several ethical and practical factors, so biomechanical ...
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Numerical and Experimental Study on Fracture of Chute Structure at Deployment of Invisible Passenger Side Airbag
L. Kangwook - Hyundai Mobiles
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