<p>This study examines the failure sequence of plies in multilayered glass fiber reinforced polymer (GFRP) laminates subjected to tensile loads, both with and without central holes. An 18-ply GFRP laminate with a stacking sequence of [45/0/-45]<sub>6</sub> and a central hole is used to validate numerical models under tensile loading. Initially, experimental results from a GFRP specimen with a central hole are compared with numerical simulations to determine modeling parameters. Following validation, a comprehensive parametric study is conducted on laminates with and without holes. Various stacking configurations, including [0/45/0]<sub>2</sub>, [0]<sub>6</sub>, [0/90/0]<sub>2</sub>, [45/0/-45]<sub>2</sub>, [45/-45/45]<sub>2</sub>, [45]<sub>6</sub>, and [45/0/90]<sub>2</sub> are analyzed to assess maximum load capacity, ply failure sequences, damage initiation, and progression. Force-displacement and damage-force diagrams are utilized to interpret the results. The findings indicate that matrix tensile failure and shear damage are the predominant failure modes which subsequently trigger fiber tension and matrix compression failures, leading to overall laminate failure across various configurations.</p>

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Failure Sequence of Plies in Multilayered GFRP Laminates with and Without Center Holes Subjected to Tensile Loads

  • Farshad Behzadinia,
  • Saeed Erfani

摘要

This study examines the failure sequence of plies in multilayered glass fiber reinforced polymer (GFRP) laminates subjected to tensile loads, both with and without central holes. An 18-ply GFRP laminate with a stacking sequence of [45/0/-45]6 and a central hole is used to validate numerical models under tensile loading. Initially, experimental results from a GFRP specimen with a central hole are compared with numerical simulations to determine modeling parameters. Following validation, a comprehensive parametric study is conducted on laminates with and without holes. Various stacking configurations, including [0/45/0]2, [0]6, [0/90/0]2, [45/0/-45]2, [45/-45/45]2, [45]6, and [45/0/90]2 are analyzed to assess maximum load capacity, ply failure sequences, damage initiation, and progression. Force-displacement and damage-force diagrams are utilized to interpret the results. The findings indicate that matrix tensile failure and shear damage are the predominant failure modes which subsequently trigger fiber tension and matrix compression failures, leading to overall laminate failure across various configurations.