Analysis of traction‐free assumption in high‐resolution EBSD measurements
Analysis of traction‐free assumption in high‐resolution EBSD measurements
复制标题
高分辨率 EBSD 测量中的无牵引假设分析
作者：
T. Hardin;T. Ruggles;D. Koch;S. Niezgoda;D. Fullwood;E. Homer
分析了使用无牵引（平面应力）假设从高分辨率EBSD测量中获得全畸变张量的影响。推导出了由样品表面角取向偏差引起的无牵引力误差的方程；在恢复畸变的误差显示为二次相对于该错误取向，和最大的“安全”角度错误取向显示为2.7度。局部应力场对无牵引假设的影响随后通过数值案例研究进行了检验，该研究使用Boussinesq形式来模拟自由表面附近的应力场。除了局部应力场源非常接近样本点的情况外，无牵引假设似乎非常可靠。
The effects of using a traction‐free (plane‐stress) assumption to obtain the full distortion tensor from high‐resolution EBSD measurements are analyzed. Equations are derived which bound the traction‐free error arising from angular misorientation of the sample surface; the error in recovered distortion is shown to be quadratic with respect to that misorientation, and the maximum ‘safe’ angular misorientation is shown to be 2.7 degrees. The effects of localized stress fields on the traction‐free assumption are then examined by a numerical case study, which uses the Boussinesq formalism to model stress fields near a free surface. Except in cases where localized stress field sources occur very close to sample points, the traction‐free assumption appears to be admirably robust.
使用电子背散射衍射评估应变测量的精度 - 第 1 部分：探测器评估。
影响因子：
2.2
作者：
Britton TB
通讯作者：
Britton TB