Multiresolution Topology Optimization of Large-Deformation Path-Generation Compliant Mechanisms with Stress Constraints

Topology optimization is a powerful numerical tool in the synthesis of lightweight structures and compliant mechanisms. Compliant mechanisms present challenges for topology optimization, as they typically exhibit large displacements rotations. Path-generation are class that designed to follow an exact path. The characteristics therefore exclude validity linear finite-element analysis ensure proper modeling deformation stresses. As stresses can exceed limit when neglected, stress constraints needed Both nonlinear well consideration significantly increase computational cost optimization. Multiresolution which employs different levels discretization representation material distribution, allows important reduction effort. A multiresolution methodology proposed integrating based on path-generation Two objective formulations used motivate validate this methodology: maximum-displacement formulation their sensitivities within explained. We introduce two academic benchmark examples demonstrate results each formulations. To show practical, large-scale application method, mechanism structure droop-nose morphing wing concept shown.