Measurement of Biaxial Notch Root Strain under Cyclic Loading Using Laser Speckle Strain/Displacement Gauge

机译：使用激光散斑应变/位移计在循环载荷下测量双轴缺口根应变

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The effect of deformation constraint on the notch rootrnstrain under cyclic loading was examined. Biaxialrnstrains at the notch root of type 304 stainless steelrnspecimen subjected to cyclic loading was measured byrnusing a newly developed laser specklernstrain/displacement gauge. The total strain range at thernnotch root was observed to increase with increasing thernnumber of stress cycles at room temperature, while itrndecreased at 673K. The change in the cyclic strain rangernwas large when a blunt notched specimen subjected to arnhigh applied stress. A negative ratio of a lateral totalrnstrain range to a longitudinal total strain range, , wasrnalso examined. When a blunt notched specimen wasrnsubjected to a high applied stress, the value ofrnapproached 0.5, which meant that the stress state at thernnotch root was a plane stress condition. While, when arnsharp notched specimen was subjected to a low appliedrnstress, the value of approached 0, which meant that thernstress state was a plane strain condition. It was foundrnthat both the biaxial strain ratio and the change in therncyclic strain range were governed by deformationrnconstraint at the notch root.

机译：研究了在循环载荷下变形约束对缺口根应变的影响。通过使用新开发的激光散斑应变/位移计来测量承受循环载荷的304型不锈钢试样的切口根部的双轴应变。观察到，在室温下，切口根部的总应变范围随应力循环次数的增加而增加，而在673K时则减小。当钝口的标本受到较高的施加应力时，循环应变范围的变化很大。还检查了横向总应变范围与纵向总应变范围的负比。当钝的缺口试样受到高施加应力时，rn的值接近0.5，这意味着缺口根部的应力状态为平面应力状态。而当arnsharp缺口试样受到较小的施加应力时，其值接近0，这意味着应力状态为平面应变状态。研究发现，双轴应变比和循环应变范围的变化均受切口根部变形的约束。

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来源
《Asian Pacific conference for fracture and strength'99 (APCFS'99)》|1999年|p.1-7|共7页
会议地点 Xian(CN);Xian(CN)
作者
Keiji OGURA; Izuru NISHIKAWA; Hiroyuki WAKI;
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作者单位

Division of Mechanical Science, Graduate School of Engineering Science, Osaka University, 1-3,rnMachikaneyama-cho, Toyonaka, Osaka 560-8531, Japan;

rnDivision of Mechanical Science, Graduate School of Engineering Science, Osaka University, 1-3,rnMachikaneyama-cho, Toyonaka, Osaka 560-8531, Japan;

rnGraduate student, Division of Mechanical Science, Graduate School of Engineering Science,rnOsaka University, 1-3, Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan;

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原文格式 PDF
正文语种 eng
中图分类机械制造用材料;
关键词
laser speckle strain/displacement gauge; rnbiaxial strain; notch root constraint; rncyclic hardening/softening; biaxial strain ratio; rnfatigue; elevated temperature; type 304 stainlessrnsteel;

机译：激光散斑应变/位移计;双轴应变;缺口根约束;循环硬化/软化;双轴应变比;疲劳;高温; 304型不锈钢;

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专利

1. Notch Root Biaxial Cyclic Strain Behavior of Type 304 Stainless Steel at Elevated Temperature Using Laser Speckle Strain/Displacement Gauge [J] . Hiroyuki Waki, Keiji Ogura, Izuru Nishikawa JSME International Journal. Series A . 2001,第3期

机译：使用激光散斑应变/位移规在高温下304型不锈钢的缺口根双轴循环应变行为
2. Notch Root Biaxial Cyclic Strain Behavior of Type 304 Stainless Steel at Elevated Temperature Using Laser Speckle Strain/Displacement Gauge [J] . Hiroyuki Waki, Keiji Ogura, Izuru Nishikawa JSME International Journal. Series A . 2001,第3期

机译：304型不锈钢在高温下的缺口根双轴循环应变特性，采用激光散斑应变/位移计
3. Biaxial Creep Strains at Notch Roots—Measurement and Modeling [J] . H. Zeng, W. N. Sharpe Jr. Journal of Engineering Materials and Technology . 1997,第1期

机译：缺口根处的双轴蠕变应变—测量和建模
4. Transient measurements on displacement and strain fields at crack tip under cyclic loading [C] . J. W. Tong, Q. L. Shu, Z. Y. Wang, Society for Experimental Mechanics XI International Congress and Exposition on Experimental and Applied Mechanics . 2004

机译：循环加载下裂纹尖端位移和应变场的瞬态测量
5. MEASUREMENT OF SURFACE DISPLACEMENTS AND STRAINS BY THE DOUBLE APERTURE SPECKLE SHEARING CAMERA. [D] . BRDICKO, JAN. 1977

机译：通过双孔散斑剪切相机测量表面位移和应变。
6. Biaxial Mechanical Testing of Posterior Sclera using High-Resolution Ultrasound Speckle Tracking for Strain Measurements [O] . Benjamin Cruz-Perez, Junhua Tang, Hugh J. Morris, -1

机译：后巩膜的双轴力学测试采用高分辨率超声散斑跟踪进行应变测量
7. Notch Root Biaxial Cyclic Strain Behavior of Type 304 Stainless Steel at Elevated Temperature by Using Laser Speckle Strain/Displacement Gauge. [O] . Hiroyuki WAKI, Keiji OGURA, Izuru NISHIKAWA 2000

机译：采用激光散热株/位移量计升高温度型304型不锈钢的凹口根双轴循环应变行为。
8. Two-dimensional surface strain measurement based on a variation of Yamaguchi's laser-speckle strain gauge [R] . Barranger, John P. 1990

机译：基于Yamaguchi激光散斑应变计变化的二维表面应变测量

Measurement of Biaxial Notch Root Strain under Cyclic Loading Using Laser Speckle Strain/Displacement Gauge

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