Brittle Residual Strain and Continuum Damage at Variable Uniaxial Loading

Abstract

Experimental data on brittle damage evolution lead to a reasonably simple model regarding material response both in damage-active and inactive branches of an arbi trary variable cyclic process. Distinction between the control and the internal strain fol lows, complemented by the introduction of a proper effective strain measure and a clear formulation of the brittle residual strain and continuum damage incremental growth laws. Earlier findings, [8], regarding the criterion for the failure damage and the determination of the dissipation at failure are thus complemented. Linear stress response to the effective strain is found to be valid throughout the process. The resulting kinematic formulation en ables efficient numerical evaluations, representing a convenient starting point for FE oriented multiaxial modelling at variable loads, [10].

Keywords

continuum damage brittle response brittle residual strain cyclic fa tigue.

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References

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