15 research outputs found
Stress concentration minimization of 2D filets using X-FEM and level set description
This paper presents and applies a novel shape optimization approach based on the level set description of the geometry and the extended finite element method (X-FEM). The method benefits from the fixed mesh work using X-FEM and from the curves smoothness of the level set description. Design variables are shape parameters of basic geometric features that are described with a level set representation. The number of design variables of this formulation remains small, whereas global (i.e. compliance) and local constraints (i.e. stresses) can be considered. To illustrate the capability of the method to handle stress constraints, numerical applications revisit the minimization of stress concentration in a 2D filet in tension, which has been previously studied in Pedersen (2003). Our results illustrate the great interest of using X-FEM and level set description together. A special attention is also paid to stress computation and accuracy with the X-FEM
A generative design method for structural topology optimization via transformable triangular mesh (TTM) algorithm
New strategy to promote conversion efficiency using high-index nanostructures in thin-film solar cells
Concurrent optimization of material spatial distribution and material anisotropy repartition for two-dimensional structures
A new overhang constraint for topology optimization of self-supporting structures in additive manufacturing
On topology optimization with elliptical masks and honeycomb tessellation with explicit length scale constraints
Motion error based robust topology optimization for compliant mechanisms under material dispersion and uncertain forces
Computer-Aided Tissue Engineering: application to the case of Anterior Cruciate Ligament Repair
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