In this chapter a micro‐mechanical model is developed for laminated composite materials and implemented using the explicit finite element method. The micro‐mechanical model implemented in the explicit finite element code can be used for simulating the behavior of composite structures under various loads such as impact and crash. The stress–strain relation for the micro‐model is derived for a shell element. A micro‐failure criterion (MFC) is presented for each material constituent and failure mode. During the finite element simulation, after the elements reach their maximal stress values, strain softening starts and due to minor numerical differences some elements are further deformed, whereas other elements are unloaded. The chapter discusses the polymer resin's strain rate effects. As a demonstration of the prediction of the developed formulation, examples will be discussed in the chapter.
Nonlinear Strain Rate Dependent Micro‐Mechanical Composite Material Model for Crashworthiness Simulation
2013-10-24
30 pages
Article/Chapter (Book)
Electronic Resource
English
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