Test and inversion of properties parameters of Ti/EPDM bonded interface

doi:10.19936/j.cnki.2096-8000.20251228.011

Abstract

Abstract: The bonded interface of Titanium alloy/ethylene propylene diene monomer (EPDM) is one of the crucial interfaces in the solid rocket engine shell. In this paper, the simulation performance parameters were obtained based on the fracture toughness analysis test of mode Ⅰ and Ⅱ interface, and the failure criterion parameters were obtained through shear and peel tests. The finite element model of the double cantilever beam (DCB) specimen was established, and the contact of bonding surface was defined with the bilinear cohesive zone model. The degree of coincidence between the simulation and the experimental curve was calculated by formula, and the optimal value of the function was obtained by artificial neural network in combination with genetic algorithm (GA-ANN), simulated annealing (SA-ANN), and MATLAB in combination with genetic algorithm (GA-MAT) and simulated annealing (SA-MAT). Thus, the precise value of the interface modulus was obtained. Based on the experimental test results, numerical simulation was used as a reverse engineering tool, optimization calculation was used as an analysis method, and the precise value of the Ti/EPDM bonding interface performance parameters was obtained by combining testing, simulation, and calculation. The results are verified based on the test, and are in good agreement, providing a criterion for evaluating the environmental adaptability of the combustion chamber shell interface structure.

Key words: ethylene propylene diene monomer, double cantilever beam, adhesive interface, artificial neutral network, parameter inversion, composites

CLC Number:

TB332

CHEN Caiyue, DING Anxin, ZHANG Yu, HUANG Zeyong, YANG Fan, ZHAO Fei, ZHOU Rui, TANG Zijia. Test and inversion of properties parameters of Ti/EPDM bonded interface[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(12): 79-87.

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