TJ993 : Dynamic crack growth in variable angle tow composite laminate under generalized thermal shock
Thesis > Central Library of Shahrood University > Mechanical Engineering > PhD > 2024
Authors:
[Author], [Supervisor], [Supervisor]
Abstarct: In this study, the dynamic crack propagation in variable angle tow (VAT) composite laminates subjected to thermal shock has been investigated. To analyze variable angle tow composite laminate, the extended finite element method (XFEM) was employed for modeling. The generalized thermoelasticity model of Lord-Shulman was employed to apply thermal shock. After discretizing the governing equations baxsed on dimensionless generalized thermoelasticity models, the Newmark method was used to solve the dynamic system of equations in the time domain. To calculate the stress intensity factors (SIF) for a moving crack, A domain-independent interaction integral was developed for dynamic crack growth problems in VAT composite laminate. This modification incorporated additional terms into the interaction integral. After obtaining the stress intensity factors using the interaction integral, the Asymptotic fields near the moving crack tip were calculated. These fields were then employed to determine the crack growth angle using the modified maximum hoop stress criterion. In several numerical examples, the effects of fiber orientation, initial crack angle, classical and non-classical thermal shock, heat wave velocity, and anisotropy ratio variations on the crack propagation path and speed, changes in stress intensity factors, and temperature variations at the crack tip were analyzed and evaluated.
Keywords:
#Keywords: Variable Angle Tow (VAT) composite laminate #Dynamic crack growth #Extended Finite Element Method (XFEM) #Generalized Thermoelasticity model #Stress Intensity Factors (SIFs) #Domain-independent integral.   Keeping place: Central Library of Shahrood University
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