【作者】 李仲； 葛森； 陈莉； 白生宝； 刘国强；

【Author】 Li Zhong Ge Sen Chin Chen Bai Shengbao Liu Guoqiang Aircraft Strength Research Institute of china,Xi’an,710065

【机构】 中国飞机强度研究所；

【摘要】 紧固孔结构细节的原始疲劳质量是飞机结构耐久性设计分析中最重要的内容之一, 本文对钛合金 TC4锻件紧固孔结构细节的原始疲劳质量进行了研究。进行了钛合金锻件的耐久性试验。给出了原始疲劳质量的描述参数,即结构细节的当量初始裂纹尺寸(EIFS)。用这种描述参数,建立了相应的当量初始裂纹尺寸判据和寿命判据。并用所建立的判据对钛合金紧固孔结构细节的原始疲劳质量进行了评定,结果表明钛合金紧固孔结构细节的原始疲劳质量评定结果满足飞机结构的原始疲劳质量控制要求。更多还原

【Abstract】 Initial fatigue quality of fastener hole details is one of important contents for durability design and analysis of airerafc structures.The titanium alloy specimens with fastener hole were tested.A describing parameter for initial fatigue quality of fastener hole details is presented that is equivalent initial flaw size(EIFS)of structure detail.The EIFS criteria and life criteria are respectively established based on the describing parameter,and the initial fatigue quality of fastener hole details is established based on the describing parameter,and the initial fatigue quality of fastener hole details of integral forging structures of titanium alloys is evaluated by using established criteria. It is shown the established criteria are available for the initial fatigue quality evaluation of fastener hole,and evaluation results are satisfied with the control requirement of initial fatigue quality.更多还原