Simple strategy toward tailoring fracture properties of brittle architected materials

2022/09/08 by Daicong Da, Wei Chen
Engineering · Computer Science · #Topology Optimization in Engineering #Advanced Mathematical Modeling in Engineering #Composite Material Mechanics

paper · doi:10.1002/nme.7123

Abstract

ABSTRACT Based on standard stiffness (compliance) and stress designs in structural topology optimization (TO), this work proposes a simple strategy to tailor fracture properties of brittle architected materials. Material distribution in the design domain is customized through a stress‐constrained strain‐energy maximization TO framework. Structures consisting of a singlephase brittle material are studied. Mechanical fracture properties of the optimized structure including stiffness, toughness, strength, and failure displacement are thereafter quantified via the phase field modeling. Reported results show that the obtained architecture can achieve 6 times tougher and more than 1.5 times stronger compared with the stiffness‐only TO result. Against to stress‐only optimization, all concerned mechanical properties including stiffness, toughness, and strength can be improved by more than 15% simultaneously.

Citations

• Topology optimization of structures under variable loading using a damage superposition approach
• The method of moving asymptotes—a new method for structural optimization
• Gmsh: A 3‐D finite element mesh generator with built‐in pre‐ and post‐processing facilities
• Thermodynamically consistent phase‐field models of fracture: Variational principles and multi‐field FE implementations
• Topology optimization of energy absorbing structures with maximum damage constraint
• Topology optimization of particle‐matrix composites for optimal fracture resistance taking into account interfacial damage
• A novel topology optimization formulation for enhancing fracture resistance with a single quasi‐brittle material
• Level‐set topology optimization for maximizing fracture resistance of brittle materials using phase‐field fracture model
• Doing Topology Optimization Explicitly and Geometrically—A New Moving Morphable Components Based Framework

Related

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