... 切线模数tangent modulus 切线应力tangent shearing stress 切线应力tangential stress ...
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Based on shearing stress Theorem, we know that the shearing stress direction of all the spots on the edge of circular cross-section should be tangent to the circle.
由切应力互等定理可知，在截面边缘上各点处切应力方向必与圆周相切。
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