作者：马辉, 傅志强, 刘锡贝, 李学军
作者单位：天津出入境检验检疫局, 天津 300201
关键词：压扁试验;弯曲试验;模拟;应力
摘要：
天然气管道管检验项目中压扁和弯曲试验的选用因各标准体系间的差异存在一定分歧，所以依据压扁和弯曲的试验方法，利用ANSYS有限元模拟软件对钢管的压扁和弯曲试验分别进行模拟，实现对压扁和弯曲试验整个过程的直观分析。通过对比压扁和弯曲试样变形部位残余应力场的分布和变化，分析认为弯曲试验的塑性变形程度大于压扁试验，使钢管更难通过弯曲试验。所以，弯曲试验可以代替压扁试验用以评价钢管塑性变形的能力。最后比较模拟结果与实测试验结果，取得较好的一致性。
Feasibility study on gas pipeline bending test replacing flattening test
MA Hui, FU Zhiqiang, LIU Xibei, LI Xuejun
Tianjin Entry-exit Inspection and Quarantine Bureau, Tianjin 300201, China
Abstract: Divergence exists in choosing flattening or bending tests in natural gas pipeline test projects because of their respective standard systems. Visual analysis of the whole process is realized by ANSYS finite element simulation software stimulations on the basis of flattening and bending test methods. The distribution and changes of residual stress field of deformation parts in flattening and bending tests are compared. Analysis suggests that the plastic deformation degree of bending test is greater than that of flattening test, making it harder for steel pipes to pass through. Therefore, bending test can be used in place of flattening test for evaluating the plastic deformation ability of steel pipes. In the end, good consistency is seen in the comparison between simulation and actual measurement test results.
Keywords: flattening test;bending test;simulation;stress
2016, 42(7): 24-30 收稿日期: 2015-11-23;收到修改稿日期: 2016-1-4
基金项目: 国家质量监督检验检疫总局科技计划项目（2015IK270）
作者简介: 马辉(1984-),男,天津市人,硕士,研究方向为金属材料检测。
参考文献
[1] Standard specification for seamless and welded steel pipe for low-temperature service:ASTM A333M:2011[S].2011.
[2] Standard test methods and definitions for mechanical testing of steel products: ASTM A370M:2012[S].2012
[3] 杨道合,段隆臣. 石油取芯钻头石墨模具在热压过程中的受力状况分析[J]. 金刚石与磨料磨具工程,2009(5):56.
[4] 孙茂才. 金属力学性能[M]. 哈尔滨:哈尔滨工业大学出版社,2005:53-56.
[5] 敬仕煜,郭英俊,姜筱红,等. 大口径厚壁管压扁试验和弯曲试验严格程度的比较[J]. 理化检验-物理分册,2013(49):236-240.
[6] Standard test method for verifying the alignment of X-Ray diffraction instrumentation for residual stress measurement: ASTM E915: 2010[S].2010.
[7] Non-destructive testing. Test method for residual stress analysis by X-ray diffraction: EN 15305: 2008[S].2008.
[8] 无损检测X射线应力测定方法:GB/T 7704-2008[S]. 北京:中国标准出版社,2008.
[9] 低温管道用无缝钢管:GB/T 18984-2003[S]. 北京:中国标准出版社,2003.
[10] Steel tubes for low temperature service: JIS G 3460: 1988[S].1988.
[11] Steel heat exchanger tubes for low temperature service: JIS G 3464:1988[S].1988.
[12] Seamless steel tubes for pressure purposes——Technical delivery conditions——Part 3:Unalloyed and alloyed steels with specified low temperature properties: ISO 9329-3:1997[S].1997.
[13] Welded steel tubes for pressure purposes——Technical delivery conditions——Part 3: Electric resistance and induction welded unalloyed and alloyed steel tubes with specified low temperature properties: ISO 9330-3:1997[S].1997.
[14] Standard specification for general requirements for alloy and stainless steel pipe: ASTM A999M:2014[S].2014.
