Reliability and sensitivity analysis of the edgewise compressive strength of scarf repaired honeycomb sandwich structures

doi:10.19936/j.cnki.2096-8000.20240128.001

Abstract

Abstract: Taking the scarf repaired honeycomb sandwich structure of composite materials as the research object and considering the uncertainty of the adhesive layer material properties, the edgewise compression progressive damage analysis model of the scarf repaired honeycomb sandwich structure was established by ABAQUS-MATLAB-Python simulation, and the corresponding output response of random variables was obtained. Then, the reliability analysis was carried out based on Monte Carlo method, and the global sensitivity analysis method based on variance and failure probability was used to analyze the parameter sensitivity. The results show that the failure probability of the structure has great differences under different numerical intervals of external loads, and the failure probability increases significantly when approaching the ultimate failure load. The elastic modulus in the thickness direction of the adhesive layer and the shear modulus in the two mutually perpendicular directions in the plane have a great influence on the variance of the lateral compressive strength and failure probability of the honeycomb sandwich structure of the digging and repair.

Key words: composite, honeycomb sandwich structure, scarf repaired, global sensitivity, reliability

CLC Number:

TB332

WANG Xuan, WANG Wei, YU Fen, ZOU Runwen, WANG Kuikui. Reliability and sensitivity analysis of the edgewise compressive strength of scarf repaired honeycomb sandwich structures[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(1): 5-12.

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