Research on the Failure of Bolted Flange Connection Structure between Stages of the Missiles (Rockets) under the AbnormalLoad

doi:10.3969/j.issn.1000-1093.2020.02.022

Abstract

Abstract: According to the structural characteristics of the bolted flange connection structure between stages of the missiles (rockets), two sets of simplified principle test specimens were manufactured, and the failure experiments of connection structure under impact and quasi-static loads were designed and carried out. The response data of bolts and the slotted displacement of connecting interface are analyzed by comparing the failure results under the action of impact force and quasi-static loading force, and the failure mechanism of connection structure is summarized. A finite element model is established to stimulate the failure process of connection structure, which is verified by the measured data. The research results indicate that the connection structure shows a sequential failure mode under the transverse abnormal load, and the actual failure mode of single bolt is “stretching-bending coupling” failure due to the obvious bending deformation caused by the “leverage effect” of flange. The “strain rate effect” of bolt material under impact loading is not significant, and the “strain rate effect” of dynamic loading can be temporarily ignored in the choice of constitutive model in simulation. It can be seen from the comparison with the measured data that the simulation model based on the explicit algorithm of Abaqus has the simulation error of failure process of connection structure within 15%, and the conclusion obtained by the numerical simulation can be considered to be reliable in the engineering. Key

Key words: missile, rocket, boltedflangeconnectionstructure, impactload, quasi-staticload, failuremechanism, finiteelementmodel

CLC Number:

TIAN Tonghui, YUAN Jiehong, WANG Qingwen, GUAN Zhenqun, CHEN Baisheng. Research on the Failure of Bolted Flange Connection Structure between Stages of the Missiles (Rockets) under the AbnormalLoad[J]. Acta Armamentarii, 2020, 41(2): 388-397.

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第41卷
第2期2020 年2月兵工学报ACTA
ARMAMENTARIIVol.41No.2Feb.2020

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