The numerical simulation of structural parts made from plastics is becoming increasinglyimportant nowadays. The fact that almost any structural requirement can be combined in alightweight, durable and cost effective structure is the driving force behind its widespreadapplication. More and more structural relevant parts are being constructed andmanufactured from plastics. It is difficult accurately to predict the reliability according tofinite element analysis, because plastics materials show the complex material behaviour.Thus, it is demanded for reliable and obvious methods to design these parts and to predicttheir material behaviour. For the finite element simulations of polymeric materialsmathematical models are needed which cover all the phenomena of the material.In this paper, it is possible to describe accurately the mechanical behaviour ofthermoplastic materials using a new constitutive model termed as SAMP-1(Semi-Analytical Model for Polymers) in LS-dyna. We performed the high speed tension tests(strain rate: 0.001/s, 0.1/s, 1/s, 50/s, 100/s) for the characterisation of the plasticsmaterial. Also, the parameters of the SAMP-1 model were identified by using multidirectionalmechanical tests such as uniaxial tension, simple shear, and compression tests.As validation purpose, the SMAP-1 model was compared to the existing models forpredicting the stress-strain behaviour in the test specimens and the dynatup impact test.
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