A. Haufe, P.A. Du Bois, S. Kolling, M. Feucht
strengthening the materials core of manufacturing enterprises
July 22, 2015 | by Paul Du Bois | views 4509
"Reliable prediction of the behaviour of structures made from polymers is a topic under considerable investigation in engineering practice. Especially, if the structure is subjected to dynamic loading, constitutive models considering the mechanical behaviour properly are still not available in commercial finite element codes. First, we give an overview of material laws for thermoplastics and show how the behaviour can be characterized and approximated by using visco-elasticity and metal plasticity, respectively. Experimental work is presented to point out important phenomena like necking, strain rate dependency, unloading behaviour and damage. A constitutive model including the experimental findings is derived. In particular, different yield surfaces in compression and tension and strain rate dependent failure, the latter with damage induced erosion, need to be taken into account. With the present formulation, standard verification tests can be simulated successfully. Also, an elastic damage model is used to approximate the unloading behaviour of thermoplastics adequately."
A. Haufe, P.A. Du Bois, S. Kolling, M. Feucht
Mechanical Rate Dependency Yielding/Failure Analysis Automotive High Speed Testing LS-DYNA Research Papers
A Simplified Approach for Strain-Rate Dependent Hyperelastic Materials with Damage
A Comparative Review of Damage and Failure Models and a Tabulated Generalization
A Constitutive Formulation for Polymers Subjected to High Strain Rates
Development of Material Input Data for Solid Elements under Crash Loads
Improved Plasticity and Failure models for Extruded MgProfiles in Crash Simulations
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