基于SIF均匀化方法的FGM板及FGM圆筒Ⅰ型裂纹尖端应力研究  

Research on TypeⅠcrack tip stress in FGM plate and FGM hollow cylinder based on SIF homogenization method

作　　者：李戎 杨萌 梁斌 LI Rong;YANG Meng;LIANG Bin(School of Civil Engineering,Henan University of Science and Technology,Luoyang 471023,China)

机构地区：[1]河南科技大学土木工程学院,河南洛阳471023

出　　处：《船舶力学》2022年第10期1524-1535,共12页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(U1604135);河南省科技攻关项目(202102210039);河南省高等学校重点科研项目(20A130002);河南科技大学博士科研启动基金(4007-13480032)。

摘　　要：本文采用工程机械中关键FGM零部件常见结构形式(板、圆筒)作为研究对象,基于FGM裂纹尖端SIF均匀化转换方法,导出FGM结构和相应均匀材料结构之间Ⅰ型裂纹尖端应力比值关系表达式。通过算例,分析了材料组分、裂纹尺寸以及所在位置、构件几何尺寸等因素对FGM结构和相应均匀材料结构裂纹尖端应力比值的影响,揭示了裂纹尖端应力对材料梯度的高度依赖性。The important FGM structure parts in engineering machinery(plates and hollow cylinders)were considered in this paper,and based on the homogenization transform method of SIF in FGM,the expression of the relationship of stresses between FGM structure and the corresponding homogeneous structure was deter⁃mined.The influence factors such as material composition,crack size,crack location and geometry dimension on the stress ratio at crack tip were analyzed by calculation,and the high dependence of crack tip stress on the material gradient index was revealed.

关 键 词：FGM零部件 板 圆筒 裂纹 应力比值 

分 类 号：TB301[一般工业技术—材料科学与工程]