SUMMARYA Regular Indirect Boundary Element formulation is developed following a weighted residual approach. In this formulation, the fictitious source density, which appears in the integral equations of the method, is distributed on a surface which is exteriorly separated from the physical field boundary of the problem. This approach does not require the evaluation of singular integrals and produces undeteriorated solutions at geometric discontinuities. The formulation is presented here as applied to two dimensional and axisymmetric thermal problems. It includes a different subregioning scheme which treats each subregion, of a multidomain problem, separately, thereby eliminating the need for a sophisticated reduction scheme.
The stresses in the lug of a pin-lug assembly can be easily calculated using a finite element model of the lug, provided the load distribution is known. Described in this paper is a technique which utilizes the finite element mesh of the lug to model the loading on the lug at the pin-lug interface. The technique has been incorporated into a finite element program which was then used to calculate the stresses in the lug. These calculated results, assuming a rigid pin and negligible friction between the pin and the lug, were compared with those obtained from a photoelastic study and agreement was found to be good.
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