压力容器2024，Vol.41Issue(5)：21-28,8.DOI:10.3969/j.issn.1001-4837.2024.05.003
试样厚度对小冲杆试验力与材料强度相关性的影响
Influence of sample thickness on the correlation between force of small punch test and material strength
摘要
Abstract
In order to study the effect of sample thickness on the correlation between the force of small punch test and material strength,finite element simulation was conducted using virtual materials without yield platform for small punch samples with different thicknesses(0.1～0.5 mm).By extracting and analyzing the force of small punch test at fixed deflection in the finite element simulation results,the bilinear relationship between the force of small punch test and material yield strength and tensile strength was proved,and the change in thickness would not affect the Pearson correlation coefficient of the correlation.100 virtual materials with yield ratio between 0.55 and 0.9,and yield strength between 200 MPa and 1 000 MPa were randomly generated,and a lot of date was obtained by finite element simulation,then the correlation coefficient between the small punch test force and material strength at fixed defection was obtained by annealing particle swarm algorithm.Finally,the bilinear correlation between the small punch test force and material strength was verified by using four actual materials.关键词
小冲杆测试技术/材料强度/双线性模型/有限元方法Key words
small punch test/material strength/bilinear model/finite element method分类
机械制造引用本文复制引用
龙乔涵,钟继如,关凯书..试样厚度对小冲杆试验力与材料强度相关性的影响[J].压力容器,2024,41(5):21-28,8.基金项目
国家磁约束核聚变能发展研究专项(2022YFE03120000) （2022YFE03120000）
国家自然科学基金项目(52105146,52130511) （52105146,52130511）
