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用过盈配合方式将轴或销子装入刚性支承板的插口中后,其外伸端就能承受轴端载荷,但须计算出轴的弯曲应力和支承板的支承应力。如用一般的悬臂梁公式计算,算出的轴的弯曲应力值往往不够精确。例如,根据一般悬臂梁计算公式,最大弯曲力矩(和弯曲应力)产生在轴与支承板的接合点处(即图中的 C 处)。但实际上是在轴的插入部分中产生最大的弯矩,而且其弯矩计算值亦较标准悬臂梁公式计算出的值为大。
After the shaft or the pin is inserted into the socket of the rigid support plate by interference fit, the outward end can bear the axial end load, but the bending stress of the shaft and the support stress of the support plate must be calculated. As calculated using the general cantilever formula, the calculated bending stress of the shaft is often not accurate enough. For example, the maximum bending moment (and bending stress) is generated at the joint of the shaft with the support plate (ie, at C in the figure) according to the general cantilever calculation formula. However, the maximum bending moment actually occurs in the insertion portion of the shaft, and the calculated bending moment is also larger than that of the standard cantilever beam formula.