| 引用本文: | 陈国涛,梅志远,祝熠.FRC/钢嵌入式T型接头疲劳试验及可靠性分析.[J].国防科技大学学报,2023,45(4):224-231.[点击复制] |
| CHEN Guotao,MEI Zhiyuan,ZHU Yi.Fatigue test and reliability analysis of FRC/steel embedded T-joint[J].Journal of National University of Defense Technology,2023,45(4):224-231[点击复制] |
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| FRC/钢嵌入式T型接头疲劳试验及可靠性分析 |
| 陈国涛,梅志远,祝熠 |
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(海军工程大学 舰船与海洋学院, 湖北 武汉 430033)
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| 摘要: |
| 为了研究FRC/钢嵌入式T型连接接头疲劳特性,采用真空成型工艺(VARTM)及缝合技术制作T型连接接头,利用Letry疲劳试验机对接头开展拉-拉疲劳试验。根据疲劳试验结果,研究了T型接头在拉-拉疲劳载荷作用下初始损伤特性及损伤演变规律；基于两参数Weibull分布模型,开展T型连接接头疲劳可靠性分析,拟合得到接头在不同应力水平下的疲劳寿命分布规律,给出接头在不同应力水平下疲劳可靠度函数,以及接头在指定可靠度下应力/寿命双对数曲线关系式(R-lnS-lnN曲线)。结果表明,ln ln[1/R(N)]与lnN呈现良好的线性关系,T型接头疲劳寿命服从Weibull分布；疲劳寿命可靠度双对数方程建立了可靠度、疲劳寿命以及疲劳应力的关系,可指导接头疲劳可靠性设计和工程应用。 |
| 关键词: 嵌入式T型接头 缝合技术 拉-拉疲劳 初始损伤特性 两参数Weibull分布模型 R-lnS-lnN曲线 |
| DOI：10.11887/j.cn.202304022 |
| 投稿日期：2022-01-14 |
| 基金项目:国家自然科学基金面上资助项目(51479205)；国家自然科学基金青年科学基金资助项目(51609252)；海军工程大学自主立项资助项目(2020505040) |
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| Fatigue test and reliability analysis of FRC/steel embedded T-joint |
| CHEN Guotao, MEI Zhiyuan, ZHU Yi |
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(College of Naval Architecture and Ocean Engineering, Naval University of Engineering, Wuhan 430033, China)
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| Abstract: |
| In order to study the fatigue characteristics of FRC/steel embedded T-joint, the vacuum forming process (VARTM) and stitching technology were used to make T-joint, and the tension-tension fatigue test was carried out on the joint using the Letry fatigue testing machine. According to the fatigue test results, the initial damage characteristics and damage evolution of T-joints under tension-tension fatigue load were studied; based on the two-parameter Weibull distribution model, fatigue reliability analysis of T-joint connection joints was carried out, and the distribution law of fatigue life of joints under different stress levels was fitted. The fatigue reliability function of joints under different stress levels was given, as well as the stress/life double logarithmic curve relationship (R-lnS-lnN curve) of joints under specified reliability levels.The results show that ln ln[1/R(N)] has a good linear relationship with lnN, and the fatigue life of T-joints follows Weibull distribution; the double logarithmic equation of fatigue life reliability establishes the relationship between reliability, fatigue life and fatigue stress, which can guide the fatigue reliability design and engineering application of joints. |
| Keywords: embedded T-joint stitch technology tension-tension fatigue initial damage characteristics two parameter Weibull distribution model the cure of R-lnS-lnN |
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