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曲線研究硫酸陽極化、鉻酸陽極化和硼酸硫酸陽極化對(duì)航空鋁合金疲勞極限的影響。
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.
基于經(jīng)驗(yàn)的疲勞強(qiáng)度衰減模型,提出了一種測(cè)定材料和結(jié)構(gòu)的S-N曲線簡(jiǎn)易方法,同時(shí)可以確定材料和結(jié)構(gòu)的臨界載荷。
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.
對(duì)LF2鋁合金攪拌摩擦焊接接頭的靜載力學(xué)行為和疲勞特性進(jìn)行了研究,建立了焊接接頭的S-N曲線。
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.
對(duì)迄今前人在石墨材料上所開展的疲勞研究工作進(jìn)行了綜述,以不同的疲勞設(shè)計(jì)方法為線索,一方面 通過對(duì)石墨壽命評(píng)價(jià)的S-N曲線來分析石墨的疲勞行為;另一方面從疲勞裂紋擴(kuò)展的角度來分析在外應(yīng) 力作用下有預(yù)制裂紋的石墨的疲勞行為。
Experimental results indicated that the effect of shot-peening and ion implantation on the S-N curves is related to temperature.
結(jié)果表明,噴丸和離子注入對(duì)材料疲勞S-N曲線的影響與實(shí)驗(yàn)溫度有關(guān)。
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曲線和Miner-Palmgren線性累計(jì)損傷理論,根據(jù)BV船級(jí)社規(guī)范以及GTT文件要求,針對(duì)大型No96薄膜型LNG船舶開展了結(jié)構(gòu)疲勞強(qiáng)度評(píng)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軟件,利用E-N曲線,以初始裂紋法為主要分析方法,對(duì)U型波紋管進(jìn)行疲勞壽命分析,得到波紋管在各種工況下的疲勞壽命,從而進(jìn)行波紋管的優(yōu)化設(shè)計(jì)。
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.
從試驗(yàn)結(jié)果比較得出,這3種材料在-40℃的a-N曲線和da/dN-△K曲線全部高于25℃下的a-N曲線和da/dN-△K曲線,說明這3種材料在-40℃環(huán)境下的裂紋擴(kuò)展速率要比在25℃(常溫)下的裂紋擴(kuò)展速率要低,即同樣材料在同一載荷譜作用下,低溫環(huán)境下的裂紋擴(kuò)展壽命要高于常溫環(huán)境下的裂紋擴(kuò)展壽命。