A Thermo-mechanical cohesive zone model

Abstract

In this paper, a cohesive zone formulation that is suitable for the thermo-mechanical analysis of heterogeneous solids and structural systems with contacting/ interacting components, is presented. Well established traction-opening relations are adopted and combined with micromechanically motivated heat flux-opening relations reflecting the evolving heat transfer through the interfaces. The finite element approach for a coupled analysis within an operator-split solution framework is presented and demonstrated with an example problem.

Three-dimensional analysis of a cohesive crack coupled with heat flux through the crack

“…However, other mechanisms of heat flow through the crack can be incorporated to the model. For example, heat flow through the crack bridging structures like in [20], or through radiation can be represented. The analysis of different kinds of crack heat flow is supposed to be the subject of future research.…”

“…The thermodynamic foundations of the theory are covered for instance in [15][16][17][18]. Recent applications of thermomechanical model coupled with crack or damage can be found for example in [19][20][21][22][23]. In this paper a different approach to the problem is proposed.…”

FEM Study of Fatigue Crack Growth in a Power Semiconductor Chip Subjected to Transient Thermal Loading

“…On closure, heat transfer occurs through the undamaged part of the CZ and through the CZ surfaces in contact. In this case, the thermal conductance is given by (Oezdemir et al, 2010):…”

“…The implemented TM-CCZM represents an extension of the cyclic CZM reported in (Bouvard et al, 2009) onto the case of transient thermal loading conditions. The thermal extension is realised by augmenting mechanical relations with relations for the heat flux across the cohesive zone (CZ), along similar considerations as proposed in (Hattiangadi and Siegmund, 2005) and (Oezdemir et al, 2010). To accelerate the fatigue crack growth (FCG) simulations, the implementation also contains a cycle jump technique based on direct iteration of the damage evolution equation, as proposed in (Ural and Papoulia, 2004).…”

Coupled Thermomechanical Multiscale Modeling of Alumina Ceramics to Predict Thermally Induced Fractures Under Laser Heating

“…The fundamental response of the thermomechanical CZM was described, that is, nonlinear effects due to the conductance–separation response of the crack faces, and the coupling problem between the thermal and mechanical analyses was shown to affect the crack initiation and growth behavior. Özdemir et al . presented a thermomechanical cohesive zone model for the analysis of material interface at different scales.…”