THERMO ELASTO—PLASTIC OPTIMUM DESIGN OF CERAMIC—METAL FUNCTIONALLY GRADED MATERIALS-Ⅰ.MICROMECHANICAL AND GEOMETRICAL EFFECTS
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition1997年第4期
论文作者：王继辉
文章页码：44 - 52
摘 要：<正>The thermo elasto-plastic optimum design ofceramic-metal functionally graded materials （FGMs） wasinvestigated in this paper. The inelastic properties were firstevaluated using micromechanical approaches, then an elasto-plastic finite element model was used to calculate the thermalstress in the material. The effects of micromechanical ap-proaches, plasticity and graded interlayer thickness on thethermal stress relaxation characteristics and stress distribu-tions were studied. The results show that: （1） the macro elas-to-plastic response given by the mean-field micromechanicsand self-consistent micromechanics is nearly the same but theresponse given by the rule of mixture is different; （2）the ther-mo elasto-plastic behavior must be considered to realisticallyevaluate stress reduction, and the elasto-plastic optimum de-sign can get helpful information to determine the graded in-terlayer thicknesses; and（3） to optimize the microstructure ofthe graded material achieves reductions in critical stress com-ponent
王继辉
摘 要：<正>The thermo elasto-plastic optimum design ofceramic-metal functionally graded materials （FGMs） wasinvestigated in this paper. The inelastic properties were firstevaluated using micromechanical approaches, then an elasto-plastic finite element model was used to calculate the thermalstress in the material. The effects of micromechanical ap-proaches, plasticity and graded interlayer thickness on thethermal stress relaxation characteristics and stress distribu-tions were studied. The results show that: （1） the macro elas-to-plastic response given by the mean-field micromechanicsand self-consistent micromechanics is nearly the same but theresponse given by the rule of mixture is different; （2）the ther-mo elasto-plastic behavior must be considered to realisticallyevaluate stress reduction, and the elasto-plastic optimum de-sign can get helpful information to determine the graded in-terlayer thicknesses; and（3） to optimize the microstructure ofthe graded material achieves reductions in critical stress com-ponent
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