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Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates
Published on: April 27, 2019
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Multiscale Compressive Failure Analysis of Wrinkled Laminates Based on Multiaxial Damage Model
Jian Shi1, Guang Yang2,3, Nan Sun4
1College of Aviation Engineering, Civil Aviation Flight University of China, Chengdu 641419, China.
Materials (Basel, Switzerland)
|October 16, 2025
Summary
Wrinkles in Carbon Fiber Reinforced Composites (CFRC) reduce load capacity and cause buckling. This study used experiments and a novel multiscale model to analyze wrinkle effects on CFRC failure modes and performance.
Area of Science:
- Materials Science
- Mechanical Engineering
- Composite Materials
Background:
- Waviness defects (wrinkles) are common in composite manufacturing.
- These defects can significantly degrade the mechanical performance of composite structures.
Purpose of the Study:
- To investigate the impact of wrinkles on the ultimate load and failure modes of Carbon Fiber Reinforced Composite (CFRC) laminates.
- To analyze the effects of varying waviness ratios on laminate behavior under compression.
Main Methods:
- Experimental compression tests were conducted on CFRC laminates with different stacking sequences and waviness ratios.
- A novel multiscale progressive damage model using a user material (UMAT) subroutine was developed for simulations.
- The model integrated a generalized method of cells with Hashin failure criteria for macro-microscopic damage analysis.
Main Results:
- The multiscale model accurately predicted load-displacement curves and failure modes, showing good agreement with experimental data.
- Wrinkle defects were found to reduce the ultimate load-carrying capacity of CFRC laminates.
- Wrinkles promoted local buckling and altered damage distribution and failure mechanisms.
Conclusions:
- Wrinkles significantly compromise the structural integrity and performance of CFRC laminates.
- The developed multiscale model is effective for predicting the behavior of wrinkled composite structures.
- Understanding wrinkle effects is crucial for designing reliable composite components.
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