瞿文隽,周昌玉,于勤.含环向穿透裂纹正交各向异性TA2管道失效评定曲线[J].稀有金属材料与工程,2019,48(4):1051~1058.[Qu Wenjun,Zhou Changyu,Yu Qin.The Failure Assessment Curve of the Circumferential Through-wall Cracked Orthotropic TA2 Pipe[J].Rare Metal Materials and Engineering,2019,48(4):1051~1058.]
含环向穿透裂纹正交各向异性TA2管道失效评定曲线
投稿时间:2017-11-26  修订日期:2019-04-24
中文关键词:  TA2  正交各向异性  极限载荷  J积分  失效评定曲线  含环向穿透裂纹管道
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      本文运用三维有限元弹塑性分析计算了含环向穿透裂纹TA2各向同性和正交各向异性管道的极限载荷,J积分以及失效评定曲线。研究了不同几何尺寸和不同裂纹尺寸的管道以及正交各向异性对失效评定曲线的影响。结果表明:正交各向异性管道与各向同性管道的极限载荷,J积分有明显差异。如果将正交各向异性材料视作各向同性,当内压与极限载荷比Lr < 0.9时,评定结果会比较保守,相反当Lr >0.9时,评定结果会有一定的危险。对正交各向异性材料而言管道轴向力学性能强于环向时比较危险。因此对含环向穿透裂纹管道进行失效评定时,材料正交各向异性的影响不能忽略。
The Failure Assessment Curve of the Circumferential Through-wall Cracked Orthotropic TA2 Pipe
英文关键词:TA2  orthotropy  limit load  J integral  failure assessment curve  circumferential through-wall cracked pipe
英文摘要:
      This paper presents the limit loads, J integral results and failure assessment curve (FAC) for the circumferential through-wall cracked isotropic and orthotropic pipe of pure titanium TA2. Limit loads, J integral and curves were calculated based on the 3-dimensional (3-D) elastic-plastic finite element (FE) analyses. Geometric variables of pipe and crack size are systematically varied. Effects of the orthotropy on failure assessment curves are considered. Calculation results show that the limit load and J integral of isotropic pipe and the anisotropic pipe are obvious different. For failure assessment curves, when the load ratio Lr < 0.9, if the orthotropic material is evaluated as an isotropic material, the evaluation results are conservative. When the load ratio Lr > 0.9, if the orthotropic material is evaluated as an isotropic material, the evaluation result is too dangerous. And it is the most dangerous when the mechanical properties of the axial direction are stronger than those of circumferential direction. Thus the orthotropy of circumferential through-wall crack pipe cannot be neglected for defect assessment.
作者单位E-mail
瞿文隽 南京工业大学 2435108315@qq.com 
周昌玉 南京工业大学 changyu_zhou@163.com 
于勤 南京工业大学  
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