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Computational modeling of shape memory fibers in conforming and non‐conforming compound structures
Author(s) -
Kohlhaas Benedikt,
Klinkel Sven
Publication year - 2013
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201310064
Subject(s) - shape memory alloy , sma* , pseudoelasticity , constitutive equation , truss , fiber , materials science , rebar , finite element method , structural engineering , nonlinear system , micromechanics , composite material , mechanical engineering , computer science , composite number , martensite , engineering , microstructure , algorithm , physics , quantum mechanics
In this work a material model for shape memory alloy (SMA) fibers is presented. A constitutive model is provided which aims for computational use. The presented model incorporates all relevant material nonlinear phenomena. It takes pseudoplasticity into account as well as pseudoelasticity and further the shape memory effect (SME). The constrained SME (CSME) and the two‐way SME are covered by the presented material model. The constitutive model is implemented in a one‐dimensional truss formulation and in a 3D‐rebar element. Both formulations are used to model fiber composite structures. Those are described by the use of a non‐conforming and a conforming mesh on the mesoscale. The numerical examples show the capability of the formulation. Different meshing strategies for the fiber–matrix compound are discussed. (© 2013 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)