The effect of sulfuric acid,chromate acid and boric/sulfuric acid anodizing on fatigue performance of aeronautic aluminum alloys was studied by using S-N curve.
采用S-N曲线研究硫酸阳极化、铬酸阳极化和硼酸硫酸阳极化对航空铝合金疲劳极限的影响。
A simple method for measuring S-N curve and fatigue limit of a material or a machine part was detailed by a experiential fatigue strength decreasing model in this paper.
基于经验的疲劳强度衰减模型,提出了一种测定材料和结构的S-N曲线简易方法,同时可以确定材料和结构的临界载荷。
Mechanical behavior and fatigue properties of the LF2 aluminum joints by friction stir welding (FSW) were studied and the S-N curve of joints were established.
对LF2铝合金搅拌摩擦焊接接头的静载力学行为和疲劳特性进行了研究,建立了焊接接头的S-N曲线。
The fatigue life of graphitic materials is estimated from their S-N curves,And the fatigue behavior of graphitic materials with pre -fabricated cracks is analysed from crack propagation.
对迄今前人在石墨材料上所开展的疲劳研究工作进行了综述,以不同的疲劳设计方法为线索,一方面 通过对石墨寿命评价的S-N曲线来分析石墨的疲劳行为;另一方面从疲劳裂纹扩展的角度来分析在外应 力作用下有预制裂纹的石墨的疲劳行为。
Experimental results indicated that the effect of shot-peening and ion implantation on the S-N curves is related to temperature.
结果表明,喷丸和离子注入对材料疲劳S-N曲线的影响与实验温度有关。
The paper describes the evaluation of the fatigue life of membrane tank LNG carriers based on the S-N curves method under the assumption of linear cumulative damage (Miner-Palmgren s rule).
基于S-N曲线和Miner-Palmgren线性累计损伤理论,根据BV船级社规范以及GTT文件要求,针对大型No96薄膜型LNG船舶开展了结构疲劳强度评估研究。
Fatigue software and E-N curve are used with the initial crack method as the main method to analyze the fatigue life of U-shaped bellows under various work conditions,so as to know its fatigue life expectancy for an optimal design if it.
Fatigue软件,利用E-N曲线,以初始裂纹法为主要分析方法,对U型波纹管进行疲劳寿命分析,得到波纹管在各种工况下的疲劳寿命,从而进行波纹管的优化设计。
To study the crack growth behaviors of areonautical materials at low temperature and room temperature, the a-N curves and da/dN-△K curves of LY12CZ, LC4CS aluminium alloys and 30CrMnSiNi2A steel are tested at -40℃ and 25℃ separately.
从试验结果比较得出,这3种材料在-40℃的a-N曲线和da/dN-△K曲线全部高于25℃下的a-N曲线和da/dN-△K曲线,说明这3种材料在-40℃环境下的裂纹扩展速率要比在25℃(常温)下的裂纹扩展速率要低,即同样材料在同一载荷谱作用下,低温环境下的裂纹扩展寿命要高于常温环境下的裂纹扩展寿命。