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Metal ductility evaluation by flattening test: The geometry dependence
Wang Y; Yang GX; Lei XQ(雷现奇); Li Q; Rong LJ; Hu XF; Wei YJ(魏宇杰)
AbstractThe reliability of pipes, tubes and liquid tanks (cylinders) is of paramount significance to our life. The typical way to examine the ability of those structures to undergo plastic deformation is to apply a flattening test. In this paper, we used the Gurson-Tvergaard-Needleman damage model and finite element simulations to capture the flattening of a tube made of typical pipe materials. We demonstrated how the tube thickness, radius, and length would affect the critical displacement where tube failure initiates. For flattening with platens, the failure displacement first increases with tube length and reaches a peak value, and it then decreases and converges to a constant value for a particular geometry. The failure initiates at the two edges of short tubes, but shifts to the center in intermediate tubes where the failure displacement maximizes. Failure then always starts from the middle in even longer tubes. In contrast, flattening with indenters exhibits two peaks in the compressible displacement vs. tube length curve. In the end, we proposed effective experimental strategies to obtain the intrinsic ability of tubes under plastic deformation. The results reported here could be employed to characterize the mechanical properties of materials for pipes, tubes and tanks, and they could also be applied to guide the engineering design of such structures.
KeywordFlattening test Plastic deformability Gerson-Tvergaard-Needleman model Failure Finite element analysis
Indexed BySCI ; EI
WOS IDWOS:000459951000005
WOS Research AreaEngineering, Multidisciplinary ; Engineering, Mechanical
WOS SubjectEngineering
Funding OrganizationNational Natural Science Foundation of China (NSFC) [11425211] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22020200] ; National Key R&D Program of China [2017YFB1201302-10A] ; Basic Scientific Research Foundation of Beijing Jiaotong University [M14JB00130]
ContributorWei, YJ
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.{Wang, Yao、Yang, Guangxue、Li, Qiang、Wei, Yujie} Beijing Jiaotong Univ, Engn Res Ctr Struct Reliabil & Operat Measurement, Minist Educ, Beijing 100044, Peoples R China
2.{Lei, Xianqi、Wei, Yujie} Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
3.{Rong, Lijian、Hu, Xiaofeng} Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Wang Y,Yang GX,Lei XQ,et al. Metal ductility evaluation by flattening test: The geometry dependence[J]. INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING,2019,170:40-48.
APA Wang Y.,Yang GX.,雷现奇.,Li Q.,Rong LJ.,...&魏宇杰.(2019).Metal ductility evaluation by flattening test: The geometry dependence.INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING,170,40-48.
MLA Wang Y,et al."Metal ductility evaluation by flattening test: The geometry dependence".INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING 170(2019):40-48.
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