Open Access
ARTICLE
Bearing Failure Optimization of Composite Double-Lap Bolted Joints Based on a Three-Step Strategy Marked By Feasible Region Reduction and Model Decoupling
Fengrui Liu1, 2, 3, Wanting Yao1, 2, Xinhong Shi4, *, Libin Zhao1, 2, Jianyu Zhang5, *
1 School of Astronautics, Beihang University, Beijing, 100191, China.
2 Key Laboratory of Spacecraft Design Optimization and Dynamic Simulation Technologies, Ministry of Education, Beihang University, Beijing, 100191, China.
3 State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an, 710049, China.
4 Institute of Solid Mechanics, Beihang University, Beijing, 100191, China. 5 College of Aerospace Engineering, Chongqing University, Chongqing, 400044, China.
* Corresponding Authors: Xinhong Shi. Email: .
Jianyu Zhang. Email: .
Computers, Materials & Continua 2020, 62(2), 977-999. https://doi.org/10.32604/cmc.2020.07184
Abstract
To minimize the mass and increase the bearing failure load of composite doublelap bolted joints, a three-step optimization strategy including feasible region reduction,
optimization model decoupling and optimization was presented. In feasible region
reduction, the dimensions of the feasible design region were reduced by selecting dominant
design variables from numerous multilevel parameters by sensitivity analyses, and the
feasible regions of variables were reduced by influence mechanism analyses. In model
decoupling, the optimization model with a large number of variables was divided into
various sub-models with fewer variables by variance analysis. In the third step, the
optimization sub-models were solved one by one using a genetic algorithm, and the
modified characteristic curve method was adopted as the failure prediction method. Based
on the proposed optimization method, optimization of a double-lap single-bolt joint was
performed using the ANSYS
® code. The results show that the bearing failure load increased
by 13.5% and that the mass decreased by 8.7% compared with those of the initial design of
the joint, which validated the effectiveness of the three-step optimization strategy.
Keywords
Cite This Article
F. Liu, W. Yao, X. Shi, L. Zhao and J. Zhang, "Bearing failure optimization of composite double-lap bolted joints based on a three-step strategy marked by feasible region reduction and model decoupling,"
Computers, Materials & Continua, vol. 62, no.2, pp. 977–999, 2020. https://doi.org/10.32604/cmc.2020.07184
Citations