Abstract
The boundary element method is established as a powerful technique for the stress analysis needed in shape design optimization. Two alternative algorithms for determining the optimum are available, using either sensitivity derivatives or normal movement of the boundary on the basis of local stresses. These algorithms are investigated in relation to the problem of shape optimization of fillets in plates under tension. The results are compared with others published previously, and it is concluded that, particularly for problems such as fillets, where the feasible region for design changes is restricted by practical considerations, the normal movement approach is preferable, and avoids the need to calculate large numbers of sensitivity derivatives.
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