CAJ | 학술논문

为探讨复合材料定向断裂密封盖的可靠性,建立了密封盖材料的等效强度模型、失效准则及三维有限元计算模型.分析了在引信反向冲击下密封盖断裂破坏过程中引信冲击应力、密封层应变能随密封层厚度变化的规律,在火箭弹燃气射流正向冲击下密封盖自锁可靠性随支撑层厚度变化规律.结果表明:拓扑自锁密封盖要满足定向断裂要求,保证引信体的安全性和可靠性,其密封层厚度越小越好;在燃气射流的冲击下,随着支撑层厚度的减小,会显著增大密封盖支撑层子结构间最大接触应力.降低拓扑自锁的可靠性.
위탐토복합재료정향단렬밀봉개적가고성,건립료밀봉개재료적등효강도모형、실효준칙급삼유유한원계산모형.분석료재인신반향충격하밀봉개단렬파배과정중인신충격응력、밀봉층응변능수밀봉층후도변화적규률,재화전탄연기사류정향충격하밀봉개자쇄가고성수지탱층후도변화규률.결과표명:탁복자쇄밀봉개요만족정향단렬요구,보증인신체적안전성화가고성,기밀봉층후도월소월호;재연기사류적충격하,수착지탱층후도적감소,회현저증대밀봉개지탱층자결구간최대접촉응력.강저탁복자쇄적가고성.
In order to explore the directional fracture reliability of a composite seal cover, the models of equivalent strength, failure criteria and the 3D finite element were established. The laws of fuze impact stress during the process of fracture damage under fuze backward impact force, changes of seal layer strain energy with seal layer thickness, and the reliability of seal cov-er clue to the interlocking function under the adjacent fired-gas streams positive impact with sup-port layer thickness variation were analyzed. The results show that: 1)To meet the requirements of topological self-locking closures fracture orientation, ensure the security and reliability of fuze body, the smaller the seal layer thickness, the better; 2)At the impact of fired-gas streams, with the support layer thickness decreasing, sub-structure support layer closures largest contact stress will be greatly increased and the reliability of sell-locking topology may be lowered.