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Micromechanical modeling of longitudinal compression behavior and failure mechanism of unidirectional carbon fiber reinforced aluminum composites involving initial fiber misalignment

Jiang, Wengang; Wang, Zhenjun; Liu, Qipeng; Gao, Yuehua; Wu, Zhiyong; Xiong, Bowen; Wang, Fang; Yao, Yufeng


Wengang Jiang

Zhenjun Wang

Qipeng Liu

Yuehua Gao

Zhiyong Wu

Bowen Xiong

Fang Wang

Yufeng Yao
Professor in Aerospace Engineering


A micromechanical model with realistic initial fiber misalignment (IFM) was developed to simulate the longitudinal compression behavior of unidirectional carbon fiber/aluminum composites. The matrix and fiber were modeled using ductile damage law and brittle fracture model, respectively. The interfacial properties were firstly determined by the single-fiber push-out and transverse tensile tests, and the cohesive zone model was adopted to capture the interfacial behavior. The calculated compressive response curve is in alignment with the experimental data. Compression failure can be attributed to fiber kinking, possibly triggered by the matrix shear damage. The increase of IFM angle makes the failure mode being transformed from fiber crushing to fiber kinking, along with a significant decrease in compressive strength. With the fiber content increasing, the compressive strength increases first and then decreases, while the compressive modulus increases monotonically. Increasing interfacial strength significantly improves the compressive strength, but this is limited by the matrix properties.

Journal Article Type Article
Acceptance Date Jun 1, 2024
Online Publication Date Jun 14, 2024
Deposit Date Jun 25, 2024
Publicly Available Date Jun 15, 2025
Journal Fatigue and Fracture of Engineering Materials and Structures
Print ISSN 8756-758X
Electronic ISSN 1460-2695
Publisher Wiley
Peer Reviewed Peer Reviewed
Public URL