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压痕应变法应力计算常数的数值模拟

陈静,阚盈,姜云禄,陈怀宁

陈静,阚盈,姜云禄,陈怀宁. 压痕应变法应力计算常数的数值模拟[J]. 焊接学报, 2019, 40(1): 147-150. DOI: 10.12073/j.hjxb.2019400029
引用本文: 陈静,阚盈,姜云禄,陈怀宁. 压痕应变法应力计算常数的数值模拟[J]. 焊接学报, 2019, 40(1): 147-150. DOI: 10.12073/j.hjxb.2019400029
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CHEN Jing, KAN Ying, JIANG Yunlu, CHEN Huaining. Numerical simulation of stress determination coefficients for indentation strain-gage method[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(1): 147-150. DOI: 10.12073/j.hjxb.2019400029
Citation: CHEN Jing, KAN Ying, JIANG Yunlu, CHEN Huaining. Numerical simulation of stress determination coefficients for indentation strain-gage method[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(1): 147-150. DOI: 10.12073/j.hjxb.2019400029
shu

压痕应变法应力计算常数的数值模拟

Numerical simulation of stress determination coefficients for indentation strain-gage method

摘要

    摘要
  • 摘要: 压痕应变法是不依赖于材料的物性参数而最接近无损的一种应力测试方法，目前其应用的最大问题是应力计算常数的获得. 文中通过对动态压入材料的特性分析，以无应力下的应变增量试验数据为依据，基于传统拉伸曲线，针对不同材料动态确定合理的压入载荷，建立了适用于大多数金属材料的标定模型.结果表明，该模型所获得的标定曲线稳定可靠，规律性和准确度均优于传统的试验标定结果，基本可以代替传统的标定试验.
    Abstract: Indentation strain-gage method is one of basically non-destructive stress determination methods, which is independent of metallic material physic properties. Currently, to obtain stress determination coefficients is the biggest problem. The material dynamic characteristics were analyzed, a precise indentation load was determined based on conventional tensile curve and the experimental strain increment with stress free. A finite model for calibration test was set up successfully, which can be used to obtain the stress determination coefficients for most metallic materials. The results showed that the calibration curve obtained from the model was reliable and stable, which may essentially replace the calibration test for its regularity and accuracy were both superior to experiment results.
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    • 参考文献(12)
  • [1] 陈怀宁, 胡凯雄, 吴昌忠. 压痕应变法测量残余应力的不确定度分析[J]. 中国测试, 2010, 36(1): 24 ? 27
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    [9] 孟宪陆. 不同应力场中压痕应变法的数值模拟[D]. 沈阳: 中国科学院金属研究所, 2007.
    [10] 刘　生. 材料性能和方向性对压痕应变法测量残余应力的影响[D]. 沈阳: 中国科学院金属研究所, 2013.
    [11] 中国国家标准化管理委员会. 金属材料 残余应力测定 压痕应变法: GB/T 24179–2009[S]. 北京: 中国标准出版社, 2009.
    [12] 陈 静, 黄春玲, 陈怀宁. 三点弯曲标定实验中双向主应变之间的关系[J]. 兵器材料科学与工程, 2008, 31(6): 37 ? 40
    Chen Jing, Huang Chunling, Chen Huaining. Relationship between the two principle strains in the three-point bending calibration experiment[J]. Ordnance Material Science and Engineering, 2008, 31(6): 37 ? 40
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  • 收稿日期:  2017-09-16

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