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<p>Glass matrix particulate composites, known for their high strength-to-weight ratio and superior optical and thermal stability, have emerged as promising materials for applications in missile protection systems, brake pads, and biomedical implants. However, their inherent brittleness and flaw sensitivity pose significant challenges for crack initiation and propagation. In this work, we investigate the fracture mechanisms of these composites using the phase-field model, in which the crack and material interfaces are approximated by two distinct phase-field variables: <i>c</i> and <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\alpha \)</EquationSource> <EquationSource Format="MATHML"><math> <mi>α</mi> </math></EquationSource> </InlineEquation>. The material’s fracture toughness is expressed using the phase-field variable <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\alpha \)</EquationSource> <EquationSource Format="MATHML"><math> <mi>α</mi> </math></EquationSource> </InlineEquation>, with distinct values assigned to the interface compared to the bulk. A series of numerical simulations is performed to investigate the roles of Poisson’s ratio and interfacial fracture toughness in the fracture of glass matrix particulate composite and the associated fracture mechanisms. We explore crack deflection and attraction by fiber, investigating these effects with different Young’s modulus and Poisson’s ratio mismatches and interfacial fracture toughness. The present analysis provides valuable insights into designing crack-propagation paths and improving the fracture toughness of the WG/a-SiO<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(_2\)</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mn>2</mn> <mrow /> </mmultiscripts> </math></EquationSource> </InlineEquation> and WG/BZBa composites by tuning the interface fracture toughness.</p>

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Impact of Poisson’s ratio and interfacial fracture toughness on glass matrix particulate composite fracture

  • 期刊论文

  • 发表日期：

    2026年5月26日

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  • Suyash Chougale,
  • Yash Sharma,
  • Shashank Giri,
  • Hirshikesh Hirshikesh

摘要

Glass matrix particulate composites, known for their high strength-to-weight ratio and superior optical and thermal stability, have emerged as promising materials for applications in missile protection systems, brake pads, and biomedical implants. However, their inherent brittleness and flaw sensitivity pose significant challenges for crack initiation and propagation. In this work, we investigate the fracture mechanisms of these composites using the phase-field model, in which the crack and material interfaces are approximated by two distinct phase-field variables: c and \(\alpha \) α . The material’s fracture toughness is expressed using the phase-field variable \(\alpha \) α , with distinct values assigned to the interface compared to the bulk. A series of numerical simulations is performed to investigate the roles of Poisson’s ratio and interfacial fracture toughness in the fracture of glass matrix particulate composite and the associated fracture mechanisms. We explore crack deflection and attraction by fiber, investigating these effects with different Young’s modulus and Poisson’s ratio mismatches and interfacial fracture toughness. The present analysis provides valuable insights into designing crack-propagation paths and improving the fracture toughness of the WG/a-SiO \(_2\) 2 and WG/BZBa composites by tuning the interface fracture toughness.