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Mechanical performance and parameter sensitivity analysis of 3D braided composites joints.
Yue Wu1, Bo Nan1, Liang Chen2
1School of Civil Engineering, Harbin Institute of Technology, No. 77 Huanghe Road, Nangang District, Harbin 150090, China.
Thescientificworldjournal
|August 15, 2014
Summary
This study investigates the mechanical performance of 3D braided composite joints in CFRP trusses. Key findings reveal that main pipe diameter, thickness ratio, and braided angle significantly impact the ultimate bearing capacity of these critical structural components.
Area of Science:
- Materials Science and Engineering
- Mechanical Engineering
- Composite Materials
Background:
- 3D braided composite joints are crucial for the reliability and lightweight design of Carbon Fiber Reinforced Polymer (CFRP) truss structures.
- Understanding their mechanical performance is essential for advanced structural applications.
Purpose of the Study:
- To investigate the mechanical performance of 3D braided composite joints.
- To establish a method for determining the ultimate bearing capacity, considering strength failure.
- To analyze the sensitivity of various parameters to the joints' ultimate bearing capacity.
Main Methods:
- A numerical method based on microscopic mechanics was developed for performance investigation.
- Detailed discussion on modeling technologies: material constants, element type, grid size, and boundary conditions.
- Global sensitivity analysis was employed to assess parameter effects on ultimate bearing capacity.
Main Results:
- A method for determining ultimate bearing capacity, incorporating strength failure, was established.
- Sensitivity analysis identified key parameters influencing ultimate bearing capacity (N).
- The main pipe diameter thickness ratio (γ), main pipe diameter (D), and braided angle (α) were found to be sensitive parameters.
Conclusions:
- The developed numerical method provides a robust approach for evaluating 3D braided composite joints.
- The identified sensitive parameters (γ, D, α) are critical for optimizing joint design and performance.
- This research contributes to enhancing the reliability and lightweight characteristics of CFRP truss structures.
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