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有关周边不变形闭口薄壁杆件的约束扭转效应,在现行出版物中有多种理论的解析方法,根据这些理论计算将会得出相差很大的计算结果。文献[2]指出,按照有的理论计算所得的应力与运用另一种理论时相比,差异可达529倍。实际上,随着杆件性质的不同,这种差异可能更大。其原因在于它们采用了不同的假设和处理方法,而有的理论所作的假设是武断的,但这种错误理论由于其简单仍在广泛流传。某些书籍中对各种理论几乎都作了介绍,但未加评论。
For the constrained torsion effect of thin-walled bars with non-distorted perimeters, there are many theoretical analytical methods in current publications. Based on these theoretical calculations, very different results will be obtained. The literature [2] points out that the difference between the calculated stress according to some theories and the application of another theory can reach 529 times. In fact, with the different nature of the rod, this difference may be greater. The reason is that they adopt different assumptions and processing methods, while the assumption made by some theories is arbitrary, but the theory of such errors is still widely circulated due to its simplicity. Almost all books in the introduction of various theories, but did not comment.