| 双材料V型切口断裂研究 |
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| 引用本文： | 宋鸣,李有堂.双材料V型切口断裂研究[J].科技导报(北京),2009,27(11). |
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| 作者姓名： | 宋鸣 李有堂 |
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| 作者单位： | 宋鸣,SONG Ming(兰州理工大学,数字制造技术与应用省部共建教育部重点实验室,兰州730050;兰州理工大学机电工程学院,兰州,730050);李有堂,LI Youtang(兰州理工大学,数字制造技术与应用省部共建教育部重点实验室,兰州730050)
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| 摘 要： | 基于双材料V型切口理论,给出了新的双材料V型切口问题的应力强度因子定义,将单材料裂纹问题、双材料裂纹问题、V型切口问题的应力强度因子的定义相统一,进而得到应力外推法计算双材料V型切口K1的计算公式.以单向拉伸和三点弯曲模型为研究对象,研究了双材料中切口深度、泊松比、切口张角变化对应力奇异场的影响,得到了一些相关结论,为异体材料形成的V型切口在应力断料中应用时的参数选取提供了必要的理论依据.
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| 关 键 词： | 双材料 V型切口 应力强度因子 应力断料 有限元法 |
Fracture Characterization of V-shaped Notch in Bimaterial |
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| SONG Ming,LI Youtang . MOE Key Laboratory of Digital Manufacturing Technology , Application,Lanzhou University of Technology,Lanzhou ,China . School of Mechanical & Electronic Engineering,China.Fracture Characterization of V-shaped Notch in Bimaterial[J].Science & Technology Review,2009,27(11). |
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| Authors: | SONG Ming LI Youtang MOE Key Laboratory of Digital Manufacturing Technology Application Lanzhou University of Technology Lanzhou China School of Mechanical & Electronic Engineering China |
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| Institution: | SONG Ming1,2,LI Youtang1 1. MOE Key Laboratory of Digital Manufacturing Technology , Application,Lanzhou University of Technology,Lanzhou 730050,China 2. School of Mechanical & Electronic Engineering,China |
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| Abstract: | Based on theoretical studies on V-shaped notches in bimaterials, a new definition for the stress intensity factor is proposed, and it is extended to V-shaped notches. A generalized expression of the stress intensity factor is obtained for a crack in single material, a V-shaped notch in single material and a crack perpendicular to bimaterial interface, and then, a formula of stress extrapolation method for calculating the stress intensity factors of bimaterial models is obtained. Taking double edge cracks in... |
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| Keywords: | bimaterial V-shaped notch stress intensity factor stress blanking finite element method |
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