Residual Stress Determination by the Hole Drilling Method in the Case of Highly Stressed Surface Layers
Residual Stress Determination by the Hole Drilling Method in the Case of Highly Stressed Surface Layers
复制标题
在高应力表面层情况下通过钻孔法测定残余应力
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
B. Scholtes
中科院分区：
文献类型：
--
作者：
J. Gibmeier;J. Nobre;B. Scholtes
对于不同的旋转对称压缩残余应力分布，通常发现喷丸钢表面，增量钻孔方法的可靠性进行了研究，通过使用有限元代码ABAQUS。进行钻孔过程的模拟，以计算由于相对于实际钻孔深度的材料去除而在表面处的应变松弛。通过两种不同的钻孔评价方法，积分法（IM）和微分法（DM），这些计算的应变松弛曲线进行了评价。通过比较纯弹性模拟结果与弹塑性计算结果，确定了所谓塑性效应的误差。显然，DM的主要困难在于正确地确定残余应力梯度。塑性效应导致这两种方法高估了表面附近区域的残余应力值。
For different rotationally symmetrical compressive residual stress distributions, typically found for shot peened steel surfaces, the reliability of the incremental hole drilling method is investigated by using the finite element code ABAQUS. Simulations of the hole drilling procedure were carried out in order to calculate strain relaxations at the surface due to the material removal with respect to the actual drilling depth. These calculated strain relaxation curves were evaluated by two different hole drilling evaluation methods, the integral method (IM) and the differential method (DM). The errors of the so called plasticity effect were determined by comparing the results of purely elastic simulations with those determined by elasto-plastic calculations. Obviously, the DM has principal difficulties in determining a residual stress gradient properly. The plasticity effect results for both methods in overestimated residual stress values in the surface near region.