Finite element simulation of bending stress in Al/SiC-SiC interlocking structure brazed joints

WANG Xiaoming; ZHANG Tianlei; ZHANG Zilong; WANG Geng; LIU Jie; DANG Yaoshi; WANG Mingwei

doi:10.12073/j.hjxb.20240905001

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2025 > 46(2): 120-126. > DOI: 10.12073/j.hjxb.20240905001

WANG Xiaoming, ZHANG Tianlei, ZHANG Zilong, WANG Geng, LIU Jie, DANG Yaoshi, WANG Mingwei. Finite element simulation of bending stress in Al/SiC-SiC interlocking structure brazed joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2025, 46(2): 120-126. DOI: 10.12073/j.hjxb.20240905001

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Finite element simulation of bending stress in Al/SiC-SiC interlocking structure brazed joints

1.
School of Materials Science and Engineering, Central South University, Changsha, 410083, China
2.
Beijing Institute of Remote Sensing Equipment, Beijing, 100854, China
3.
State Key Laboratory of Precision Welding & Joining of Materials and Structures, Harbin Institute of Technology, Harbin, 150001, China

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Received Date: September 04, 2024
Available Online: February 18, 2025

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Abstract

Abstract

To enhance the reliability of Al/SiC-SiC heterogeneous material connections between the Al/SiC mirror frame and the SiC main mirror body in space reflector structures, mitigate residual stress, and prevent crack propagation, a small-scale interlocking joint design was employed. This design was analyzed using the ABAQUS finite element simulation software to simulate and calculate the bending stress distribution and stress peaks under different joint structures, quantities, and loading conditions. The results demonstrate that the trapezoidal groove interlocking joint with an aspect ratio of 1 exhibits the lowest simulated bending stress peak of 508 MPa, with no significant stress concentration areas observed in the joint, indicating optimal reliability optimization. This conclusion was further validated through brazing experiments, which revealed that the trapezoidal groove interlocking joint exhibited no apparent defects in its microstructural morphology and achieved a high bending strength of 198 MPa.
- numerical simulation,
- residual stress,
- dissimilar material brazing,
- structural design

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References

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Finite element simulation of bending stress in Al/SiC-SiC interlocking structure brazed joints