ブロック境界要素法を併用した内部応力の分離

抄録

In this paper, an effective hybrid method to obtain the principal stresses throughout the whole interior region of a two-dimensionally stressed photoelastic model is reported. The main feature of this method consists in the brief and accurate technique to separate the principal stresses, and the contents of this report are briefly stated as follows. (1) By using the isochromatic figure which has the high experimental accuracy together with the boundary element method which only needs the discretization along the boundary, the degree of error is considerably decreased. (2) For the photoelastic model which has numerous interior points and the long boundary, we can greatly save the C.P.U. time in computation by using the blocked boundary element method instead of the ordinary boundary element method. (3) The boundary element method gives a high degree of freedom in choosing the interior points at which the principal stresses must be separated because we can arbitrarily specify the interior points according to demand. (4) Once the isochromatic figure is obtained, the separation of the principal stresses will be performed at any time in need.