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    • 9. 发明授权
    • Method of determining internal stresses in structural members
    • 确定结构构件内应力的方法
    • US4155264A
    • 1979-05-22
    • US906633
    • 1978-05-16
    • Norbert BenderGerhard HoferOlaf LenzErwin Stucker
    • Norbert BenderGerhard HoferOlaf LenzErwin Stucker
    • G01L1/00G01L5/00G01N1/04
    • G01L5/0047
    • Method for determining internal stresses in structural members in machine or apparatus manufacturing by machining, around a measuring location provided with strain gages, a circular slot into the surface of the structural member that is to be measured, measuring changes in strain of the core of the measuring location left standing, and calculating the internal stresses from the measured strains and a depth-dependent decay function determined on a calibrating material sample, the improvement therein affording the determination of internal stresses in the structural members at depths greater than about 5 mm, includes the steps of mechanically removing the measuring-location core down to a new surface at the base of the circular slot, securing a strain gage to a new measuring location at the new surface, machining another circular slot around the new measuring location, measuring changes in strain of the core of the new measuring location left standing while measuring changes in strain thereof and repeating the foregoing steps for respective slot depths until a given depth at which internal stresses in the structural members are to be determined is reached, a separate depth-dependent decay function being determined on a calibrating material sample for each new measuring location core.
    • 用于确定机器或设备制造中的结构构件中的内应力的方法,通过机械加工,围绕具有应变计的测量位置,待测量的结构构件的表面中的圆形槽,测量芯的应变变化 测量位置保持不变,并计算来自测量应变的内部应力和在校准材料样品上确定的深度依赖衰减函数,其中提供在大于约5mm深度的结构构件中的内部应力的确定包括 将测量位置的核心机械地移除到圆形槽底部的新表面的步骤,将应变计固定在新表面的新测量位置,在新的测量位置周围加工另一个圆形槽,测量变化 新测量位置的核心应变在测量应变的变化时保持静止 并且对于相应的槽深度重复上述步骤,直到达到要确定结构构件中的内部应力的给定深度,在每个新的测量位置芯的校准材料样品上确定单独的深度依赖衰减函数。