<p>This study investigates the thermo-mechanical properties of woven composites by analyzing how different weaving architectures affect material behavior. Three representative patterns, namely plain weave, 5-harness satin weave, and 8-harness satin weave, are modeled to predict of the effective elastic moduli and thermal expansion coefficients based on the constituent properties of fiber bundles and matrix. A volumetric stiffness averaging method is employed to account for the influence of fiber crimp associated with interlacing frequency. Differences in mechanical stiffness are analyzed by comparing the structural characteristics of each weaving architecture. In addition, parametric studies are conducted to evaluate the effects of preform manufacturing parameters such as fiber volume fraction and inter-bundle gap on the thermo-mechanical behavior of the composites. To validate the prediction model, finite element simulations are performed for the plain weave structure and compared with the predicted results. The findings indicate that variations in interlacing density and crimp intensity significantly influence in-plane stiffness, while out-of-plane properties remain relatively insensitive to structural differences. The influence of manufacturing parameters is also examined for different weaving types. The results of this study are expected to provide useful guidelines for the design and optimization of woven composite materials.</p>

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Thermo-mechanical Property Prediction and Parametric Evaluation of Woven Composites with Varying Weaving Architectures

  • Myungjun Kim,
  • Yongha Kim

摘要

This study investigates the thermo-mechanical properties of woven composites by analyzing how different weaving architectures affect material behavior. Three representative patterns, namely plain weave, 5-harness satin weave, and 8-harness satin weave, are modeled to predict of the effective elastic moduli and thermal expansion coefficients based on the constituent properties of fiber bundles and matrix. A volumetric stiffness averaging method is employed to account for the influence of fiber crimp associated with interlacing frequency. Differences in mechanical stiffness are analyzed by comparing the structural characteristics of each weaving architecture. In addition, parametric studies are conducted to evaluate the effects of preform manufacturing parameters such as fiber volume fraction and inter-bundle gap on the thermo-mechanical behavior of the composites. To validate the prediction model, finite element simulations are performed for the plain weave structure and compared with the predicted results. The findings indicate that variations in interlacing density and crimp intensity significantly influence in-plane stiffness, while out-of-plane properties remain relatively insensitive to structural differences. The influence of manufacturing parameters is also examined for different weaving types. The results of this study are expected to provide useful guidelines for the design and optimization of woven composite materials.