This article presents an application of stress-constrained topology optimization to compliant mechanism design. An output displacement maximization formulation is used, together with the SIMP approach and a projection method to ensure convergence to nearly discrete designs. The maximum stress is approximated using a normalized version of the commonly-used p-norm of the effective von Mises stresses. The usual problems associated with topology optimization for compliant mechanism design: one-node and/or intermediate density hinges are alleviated by the stress constraint. However, it is also shown that the stress constraint alone does not ensure mesh-independency.
- Compliant mechanisms
- Stress constraints
- Topology optimization
de Leon, D. M., Alexandersen, J., Jun, J. S., & Sigmund, O. (2015). Stress-constrained topology optimization for compliant mechanism design. Structural and Multidisciplinary Optimization, 52(5), 929-943. https://doi.org/10.1007/s00158-015-1279-z