On topology optimization of large deformation contact-aided shape morphing compliant mechanisms

A topology optimization approach for designing large deformation contact-aided shape morphing compliant mechanisms is presented. Such can be used in varying operating conditions. Design domains are described by regular hexagonal elements. Negative circular masks employed to perform dual task, i.e., decide material states of each element and also, generate rigid contact surfaces. Each mask characterized five design variables, which mutated a zero-order based hill-climbing optimizer. Geometric nonlinearities considered. Continuity normals boundaries the candidate designs ensured using boundary resolution smoothing scheme. Nonlinear mechanical equilibrium equations solved Newton-Raphson method. An updated Lagrange association with segment-to-segment method formulation. Both mutual self modes permitted. Efficacy demonstrated four different desired curves. Performance deformed profiles verified commercial software. The effect frictional surface on actual profile also studied