A continuum sensitivity analysis is presented for the computation of the shape sensitivity of ®nite hyperelastic±viscoplastic deformations involving contact with friction using a direct di€erentiation method. Weak shape sensitivity equations are developed that are consistent with the kinematic analysis, constitutive sub-problem as well as the analysis of the contact/friction sub-problem used in...

Bat inspired (BI) algorithm is a recently developed metaheuristic optimization technique inspired by echolocation behavior of bats. In this study, the BI algorithm is examined in the context of discrete size optimization of steel frames designed for minimum weight. In the optimum design problem frame members are selected from available set of steel sections for producing practically acceptable ...

Remote Center Compliance (RCC) structure is a passive device for assembly. For round peg-in-hole insertion, the initial misalignments have the same possibility to occur at arbitrary direction and the applied load is concentrated on a radial plane. RCC with rotational symmetry property therefore is a desired design. How to design structures with this property is discussed and it is proved that c...

In this paper we consider optimal design problems that involve shape optimization. The goal is to determine the shape of a certain structure such that it is either as rigid or as soft as possible. To achieve this goal we combine two new ideas for an efficient solution of the problem. First, we replace the eigenvalue problem with an approximation by using the inverse iteration. Second, we use a ...