基于ABAQUS对疲劳试验夹具螺纹的失效分析
发布时间：2018-09-05 20:22
【摘要】：采用成组法对20Mn Ti B棒材进行疲劳试验,将所得的数据点标在单对数坐标轴上,通过计算相关系数r可知:该组数据不满足S-N曲线拟合的条件,即该组数据离散性较大。基于ABAQUS对失效的夹具螺纹进行有限元分析,并根据失效的螺纹牙部位及几何形状,对失效的螺纹牙进行受力分析,建立有限元模型。分析表明:夹具螺纹孔的偏心误差使得夹具螺纹的局部螺纹牙承受较大应力是导致塑性变形的主要原因,从而证实了试验所得数据离散性较大的原因,为今后的疲劳试验夹具设计及保护提供了一定的经验。
[Abstract]:The fatigue test of 20Mn Ti B bar was carried out by using group method. The data points were marked on the single logarithmic coordinate axis. By calculating the correlation coefficient r, it can be seen that the group data do not satisfy the condition of S-N curve fitting, that is, the group data is more discrete. Based on ABAQUS, the finite element analysis of the broken fixture thread is carried out, and the finite element model is established according to the position and geometry of the broken thread tooth. The analysis shows that the eccentricity error of the thread hole of the fixture causes the local thread teeth of the fixture thread to bear large stress, which is the main reason leading to plastic deformation, thus confirming the reason of the greater dispersion of the data obtained from the test. It provides some experience for the design and protection of fatigue test fixture in the future.
【作者单位】： 沈阳大学机械工程学院;中国船舶重工集团公司第七一二研究所;江苏大学机械工程学院;
【基金】：国家高技术研究发展计划(863)项目(2012AA040104)资助
【分类号】：TG75
[Abstract]:The fatigue test of 20Mn Ti B bar was carried out by using group method. The data points were marked on the single logarithmic coordinate axis. By calculating the correlation coefficient r, it can be seen that the group data do not satisfy the condition of S-N curve fitting, that is, the group data is more discrete. Based on ABAQUS, the finite element analysis of the broken fixture thread is carried out, and the finite element model is established according to the position and geometry of the broken thread tooth. The analysis shows that the eccentricity error of the thread hole of the fixture causes the local thread teeth of the fixture thread to bear large stress, which is the main reason leading to plastic deformation, thus confirming the reason of the greater dispersion of the data obtained from the test. It provides some experience for the design and protection of fatigue test fixture in the future.
【作者单位】： 沈阳大学机械工程学院;中国船舶重工集团公司第七一二研究所;江苏大学机械工程学院;
【基金】：国家高技术研究发展计划(863)项目(2012AA040104)资助
【分类号】：TG75
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相关期刊论文 前1条
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本文编号：2225368
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