Two Scale-Based Continuum Damage Model for Brittle Materials under Thermomechanical Loading

Andreas Ricoeur; Dimitri Henneberg

doi:10.4028/www.scientific.net/KEM.525-526.589

Paper Titles

Dynamic Response Analysis of Lining Structure with Primary Defects for Tunnel under Moving Train Loading
p.573

Monitoring Analysis of Tunnel Construction in a New Subway Line Down-Through an Existed Line
p.577

SMART Platform for Structural Health Monitoring of Sensorised Stiffened Composite Panels
p.581

Micromechanical Characterisation of Microstructure in Weld Heat Affected Zone of Structural Steel
p.585

Two Scale-Based Continuum Damage Model for Brittle Materials under Thermomechanical Loading
p.589

The Applicability Study on the FRP-Concrete Composite Bridge Deck for Cable-Stayed Bridges
p.593

Improvement of Fatigue Crack Growth Behavior in the Case of the Cracked Specimen with Relatively Narrow Width
p.597

Dynamic Crack Problems Using Meshless Method
p.601

Investigation of Damping Characteristics of Metals by the Use of Inverted Torsion Pendulum Method
p.605

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Two Scale-Based Continuum Damage Model for Brittle Materials under Thermomechanical Loading

Abstract:

Ceramic refractory materials initially contain a multitude of defects such as voids, microcracks, grain boundaries etc. Particularly being exposed to high temperatures above 1000 °C the macroscopic properties such as effective compliance, strength and lifetime are essentially determined by microscopic features of the material. The deformation process and failure mechanisms are going along with the creation of new microdefects as well as the growth and coalescence of cracks. A brittle material damage model for dynamic thermomechanical loading conditions is presented in this paper. Representative volume elements (RVE) include microcrack initiation and growth. The material laws are formulated on the continuum level using appropriate homogenisation methods. To demonstrate the potential of the numerical tools, two examples are presented which are taken from applications. Based on experiments, cyclic thermal shock tests at refractory plates are simulated by FEM. To quantify the thermal shock resistance of ceramics, experiments suggested by Hasselman are simulated numerically supplying a critical temperature slope.