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Constitutive modelling of thermo‐viscoelastic‐plastic behaviour of adhesively bonded joints

For ductile structural adhesives under thermal and mechanical loading, a thermo‐viscoelastic‐plastic interfacial constitutive model is introduced using a generalised MAXWELL solid in series with a thermal strain element and a ST.‐VENANT body with isotropic hardening for plasticity. The temperature dependency of the viscosity is taken into account on assuming thermorheologically simple material behaviour, while the yield threshold and the hardening parameters depend on empirical functions of temperature. Numerical examples for the model verification and validation are discussed. (© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)