Effects of temperature gradients on crack characterisation under thermal-mechanical loading conditions

摘要: With increasing temperature yield stress and Young's modulus of an engineering material decrease. The displacement distributions a crack may be substantially affected by varying temperature. Using the deformation theory plasticity we study effects gradients on assessments. It is shown that sufficiently large J control zone can found only if are small. Increasing gradient will continuously diminish control. mechanical load amplitude tension specimen hardly affects size, whereas bend loading further decrease characterization. two parameter description J-Q slightly improve prediction tip fields. second terms expansions generally depend both coordinates as soon become significant. A has been in plane fields even for high gradients.