V型缺口冲击试样尺寸公差因素的有限元分析
Research on the Machining Dimension Factors of V-notch Impact Samples by Using FEM
摘 要
对照GB/T 229-2007和ASTM E23-2012c(2014)对V型缺口冲击试样的加工要求, 使用有限元模拟计算方法, 分析了试样尺寸公差对试样缺口处应力的影响, 并利用缺口处的应力评估了尺寸公差对缺口敏感性的影响权重。结果表明:缺口底部高度和缺口角度对试样缺口敏感性的影响权重最大; 试样宽度和高度的影响次之, 试样长度的影响最小; 相比较,ASTM E23-2012c(2014)对V型缺口冲击试样加工尺寸公差的要求比GB/T 229-2007更为合理。
尺寸公差
有限元分析
缺口敏感性
影响权重
V-notch impact sample
dimensional tolerance
finite element analysis
notch sensitivity
effective weight
Abstract
By comparing the machining requirements of GB/T 229-2007 and ASTM E23-2012c(2014) to the V-notch impact samples, the effects of sample dimensional tolerances on stress of the V-notch were studied by using FEM, and the effective weight of sample dimensional tolerances on the notch sensitivity were evaluated by the stress of V-notch. The results show that the effective weights of ligament length and angle of the notch were the biggest, the effective weights of sample width and height were the second, and the effective weight of sample length was the smallest. Comparing to GB/T 229-2007, the machining dimensional tolerance requirement of ASTM E23-2012c(2014) to V-notch impact samples was more reasonable.
中图分类号 TG115.5+6
所属栏目 试验技术与方法
基金项目 上海市科委资助项目(12DZ2291000,12DZ2294700)
收稿日期 2014/5/13
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备注范立坤(1978-),男,博士。
引用该论文: FAN Li-kun. Research on the Machining Dimension Factors of V-notch Impact Samples by Using FEM[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2014, 50(8): 574～577
范立坤. V型缺口冲击试样尺寸公差因素的有限元分析[J]. 理化检验－物理分册, 2014, 50(8): 574～577
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参考文献
【1】ASTM E23-2012c(2014)Standard test methods for notched bar impact testing of metallic materials[S].
【2】GB/T 229-2007金属材料 夏比摆锤冲击试验方法[S].
【2】GB/T 229-2007金属材料 夏比摆锤冲击试验方法[S].
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