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首页> 美国政府科技报告 >Modeling Thoracic Blunt Trauma; Towards A Finite-Element-Based Design Methodology for Body Armor
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Modeling Thoracic Blunt Trauma; Towards A Finite-Element-Based Design Methodology for Body Armor

机译：模拟胸部钝器创伤;基于有限元的防弹衣设计方法

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ARL is pursuing the goal of developing a finite element-based design methodology for thoracic body armor. We describe progress in modeling two essential ingredients, a Kevlar vest and the human thorax. Thoracic armor is generally designed by an experimental methodology, which, since the 1980s, has been based on the clay-backed test codified in an NIJ standard (National Institute of Justice, 1987). This test involves placing the armor on a standardized block of clay, shooting the armor with the 'design threat,' and then measuring the depth of the crater left in the clay. No account is taken of hit location on the thorax, and as a result Kevlar vests are currently not tapered to save on weight. Nor is account taken of the time sequence of thoracic events as a response to the impact; only the permanent deformation in the clay is measured. Since at least the early 1990s, the automotive industry has been engaged in the development of 3D finite element (FE) models of the human thorax for use in numerical crash simulations. In 1999 ARL explored the potential for transitioning to the field of body armor design these advances in FE thorax modeling. The Wayne State thorax model (WSTM) (Wang, 1995) was found to be the most anatomically detailed model available. Figure 1 shows that model's representation of the skeletal, circulatory, and respiratory systems.

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