Micro-Computed Tomography Non-Destructive Testing and Defect Quantitative Analysis of Carbon Fiber-Reinforced Polymer, Glass Fiber-Reinforced Polymer and Carbon/Glass Hybrid Laminates Using Deep Learning Recognition
Source abstract
Abstract
X-ray micro-computed tomography (Micro-CT) is an advanced technique capable of non-destructive detection of internal defects in materials. Fiber-reinforced polymer (FRP) laminates are prone to forming defects such as pores during the manufacturing process, which significantly affect their mechanical properties. In this study, Micro-CT technology was employed to conduct non-destructive testing on carbon fiber (CFRP), glass fiber (GFRP) and carbon/glass hybrid (C/G) laminates. Combined with the U-Net++ deep learning model, precise segmentation and three-dimensional reconstruction of pores were achieved. A systematic quantitative analysis was carried out on the distribution, size, volume and porosity of pores in six specimens with two layup angles (0/90 and ±45). The research results show that the pores in CFRP are mainly dispersed micro-pores and are relatively evenly distributed; the porosity of GFRP is the highest, and large interlaminar pores are prone to forming. The porosity fluctuates sharply in the thickness direction, revealing that the interlaminar interface is a defect-sensitive area. This provides a reliable quantitative basis and theoretical support for optimization and defect assessment.
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Research context
OpenAlex topics: Thermography and Photoacoustic Techniques · Mechanical Behavior of Composites · Advanced machining processes and optimization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu 610000, China
School of Mechanical Engineering, Southwest Jiaotong Universtiy, Chengdu 610000, China
School of Mechanical Engineering, Sichuan University, Chengdu 610000, China
School of Mechanical Engineering, Sichuan University of Science & Technology, Chengdu 644004, China
State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China
Funding
the National Natural Science Foundation of China · Open Subject of State Key Laboratory of Rail Transit Vehicle System · Natural Science Foundation of Sichuan Province · Science Foundation of Zigong Government and Sichuan University · Open Subject of State Key Laboratory for Strength and Vibration of Mechanical Structures
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