Fiber orientation in brittle materials considering post-fracture behavior

Author(s)

da Silva, Andre Luis Ferreira ; Salas, Ruben Andres ; Moscatelli, Eduardo ; de Sa, Luis Fernando Nogueira ; Silva, Emilio Carlos Nelli

• Document type: Journal article
• Source: COMPOSITE STRUCTURES; v. 368, p. 17-pg., 2025-09-15.

Abstract

This study presents a new framework designed to optimize fiber orientation in brittle materials, with an emphasis on post-fracture behavior. It integrates phase-field fracture modeling with topology optimization to enhance the mechanical performance of fiber-reinforced concrete by more effectively managing crack propagation. The framework utilizes a novel constitutive model based on phase-field theory, which represents damage evolution in brittle materials. The optimization process involves a multi-objective function that balances structural stiffness with damage mitigation. Numerical simulations show that the optimized fiber orientation improves fracture resistance and stiffness, even after crack initiation, thereby extending the overall durability of the structure. (AU)

• FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
• Grantee: Julio Romano Meneghini
• Support Opportunities: Research Grants - Research Centers in Engineering Program
• FAPESP's process: 20/15230-5 - Research Centre for Greenhouse Gas Innovation - RCG2I
• Grantee: Julio Romano Meneghini
• Support Opportunities: Research Grants - Research Centers in Engineering Program
• FAPESP's process: 21/02340-0 - Topology optimization to design labyrinth seals considering turbulent flow and fluid-structure interaction with binary variables
• Grantee: Eduardo Moscatelli de Souza
• Support Opportunities: Scholarships in Brazil - Doctorate