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Viscoelastic‐viscoplastic‐damage modeling of thermoplastics under long‐term cyclic loading
Author(s) -
Zerbe Patrick,
Schneider Benjamin,
Kaliske Michael
Publication year - 2016
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201610195
Subject(s) - viscoplasticity , viscoelasticity , creep , materials science , thermoplastic , finite element method , term (time) , deformation (meteorology) , jump , structural engineering , composite material , mechanics , constitutive equation , engineering , physics , quantum mechanics
Thermoplastics tend to creep under mechanical loads and recover deformation during unloading. A viscoelastic‐viscoplastic‐damage model is presented to accommodate the behavior of a thermoplastic under cyclic loading‐unloading. Finite element simulations may be computationally expensive in case of many loading cycles. A cycle jump method is proposed to mitigate parts of the cost. It can efficiently approximate large parts of the cyclic calculations by extrapolating internal variables over several cycles at once. Hence, only a fraction of the original computational effort remains. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)