According to the twin shear stress theory, this paper improves on Duncan Model. 根据双剪应力理论对邓肯模型进行了修正。
Within reasonable limits, the presence of the shearing stress has no effect on the value of the bending stress, and vice versa. 在适当的限度内,剪应力的存在并不影响弯曲应力之值,反之亦然。