Finite Element Modeling of Cable Hook Bolts

Component analysis of any complex system is frequently required to determine the true accuracy of a finite element model. Although a composite system may yield the “correct” final results, the system is not truly accurate unless individual components are performing correctly. The purpose of this paper is to describe the component testing and finite element modeling of a standard 5/16”-18 x 2” galvanized shoulder hook bolt used in cable barrier systems. These bolts hold the cable to the post of a cable barrier system. During a vehicle impact with the system, the cable loads many of the restraining hook bolts in different directions. Several of the hook bolts will reach their bending yield limits and “open up,” allowing the cable to disengage. This is designed behavior which allows the cable to capture the impacting vehicle. Successful modeling of these bolts is essential to have an accurate finite element model of a complete cable barrier system.