CRACK-TIP STRESS FIELDS FOR AN ARBITRARILY ORIENTED CRACK IN A FUNCTIONALLY GRADED MATERIAL

摘要：

Crack-tip stress fields for an arbitrarily oriented crack in a functionally gradedmaterial (FGM),which has an exponential variation of elastic modulus along thegradient direction,are obtained through an asymptotic analysis.The Poissons ratioof the FGM is assumed to be constant in the analysis.The higher order terms in theasymptotic expansion of crack-tip stress fields are derived to bring out the influenceof non-homogeneity and the crack direction on the structure of the crack tip fieldsexplicitly.Explicit form of the higher order terms embodying the effect ofnon-homogeneity for individual stress components is established.The analysisreveals that only the higher order terms in the expansion are influenced by thematerial non-homogeneity and the crack direction has significant influence oncrack-tip fields.

关键词： functionally graded materials non-homogeneity asymptotic expansion method higher order stress fields

作者: Y.Dai X.F.Yan C.Q.Sun W.Tan

作者单位: Department of Mechanical Department,Armored ForceEngineering College,Beijing,100072,China

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 701-704

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）