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On Fracture Mechanics Testing Technique Based on Compliance of Specimens

机译:基于试样柔度的断裂力学测试技术研究

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摘要

Based on compliance testing of a straight-notch compact tensile (SN-CT) or a single edge bending (SEB) specimen, this paper present a formula with increment form to calculate plastic part of J-integral, two formulas for a SN-CT specimen and a SEB specimen to transform crack mouth opening displacement (CMOD) v_0 to the crack opening displacement (COD) q along load line, and simplified formulas to estimate crack length a and effective young's modulus E. Furthermore, the relation between v and q of the SN-CT specimens of 45 steel and SEB specimens of 30Cr steel were investigated. The results show that the formulas to describe the relation between the ratio v/q and the dimensionless crack length a/w of the specimens accord with the testing results better.
机译:基于对直切口紧凑拉伸(SN-CT)或单边弯曲(SEB)标本的顺应性测试,本文提出了一种具有增量形式的公式来计算J积分的塑性部分,其中两个公式用于SN-CT试样和SEB试样将沿载荷线的裂纹张开位移(CMOD)v_0转换为裂纹张开位移(COD)q,并简化了公式以估算裂纹长度a和有效杨氏模量E。此外,v和q之间的关系研究了45钢的SN-CT标本和30Cr钢的SEB标本。结果表明,描述试样的v / q比与无因次裂纹长度a / w之间关系的公式与试验结果比较吻合。

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