J-Integral of Interfacial Crack Between Metal-Base Ceramic Coating and Steel  被引量:1

J-Integral of Interfacial Crack Between Metal-Base Ceramic Coating and Steel

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作  者:徐连勇 荆洪阳 何颖 

机构地区:[1]School of Materials Science and Engineering, Tianjin University [2]Tianjin Key Laboratory of Advanced Joining Technology [3]Tianjin Internal Combustion Engine Research Institute

出  处:《Transactions of Tianjin University》2009年第1期32-36,共5页天津大学学报(英文版)

基  金:Supported by Tianjin Natural Science Foundation (No.08JCYBJC09100);New Teacher Research Fund for the Doctoral Program of Higher Education of China (No.20070056096) and New Century Outstanding Talented Person Plan of China.

摘  要:The definition of J-integral of interfacial crack was introduced. The three-point bending tests were can'ied out to obtain the critical loading values when the interfacial crack initiation occurred between coatings and substrates. The finite element analysis (FEA) was adopted to analyze the stress distribution in the specimens and compute the J-integral of the interracial crack between LX88A coating and Chinese Q345 steel. The results showed that the average value of critical J-integral is 0.70 N/m, which can be taken as the fracture parameter to evaluate the interracial fracture behavior for the three-point bending specimens of LX88A coating/Q345 steel system.The definition of J-integral of interfacial crack was introduced. The three-point bending tests were carried out to obtain the critical loading values when the interfacial crack initiation occurred between coatings and substrates. The finite element analysis (FEA) was adopted to analyze the stress distribution in the specimens and compute the J-integral of the interfacial crack between LX88A coating and Chinese Q345 steel. The results showed that the average value of critical J-integral is 0.70 N/m, which can be taken as the fracture parameter to evaluate the interfacial fracture behavior for the three-point bending specimens of LX88A coating/Q345 steel system.

关 键 词:interfacial crack J-INTEGRAL COATING three-point bending test FEA 

分 类 号:O346.1[理学—固体力学]

 

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