【中文篇名】 | LY-12CS铝合金在空气和盐水介质中△K_(th)和da/dN规律的研究 |
【英文篇名】 | THE ΔK_(th)AND da/dN OF LY-12CS ALUMINUM ALLOY IN BOTH 3.5% NaCl SOLUTION AND LABORATORY AIR |
【作者】 | 穆在勤; 尹花子; 田铁忠; 解思适; |
【英文作者】 | Mu Zaiqin and Yin Huazi (Institute of Metal Reseach; Academia Sinica )Tian Tiezhong and Xie Sishi ( Design Department of Aircraft Company; Shenyang ); |
【作者单位】 | 中国科学院金属研究所; 沈阳飞机制造厂设计部; |
【文献出处】 | 航空材料 , [英文刊名], 编辑部邮箱 1981年 S2期 期刊荣誉:中文核心期刊要目总览 ASPT来源刊 CJFD收录刊 |
【中文关键词】 | 盐水介质; 门坎值; 载荷比; 空气介质; da/dN; |
【摘要】 | 本文用中心缺口拉伸试样(CCT试样)测试了LY-12CS铝合金在室温空气和3.5%NaCl水溶液介质中三种载荷比(R=0,R=0.33,R=0.67)条件下的疲劳裂纹扩展门坎值△K_(th)及da/dN,结果表明: (1)在三种载荷比条件下,盐水介质比空气介质明显地降低了△K_(th)而提高了疲劳裂纹扩展速率da/dN。在我们试验的三种载荷比△K=7~15kg/mm~(3/2)范围内,盐水介质的da/dN是空气介质的1.6~3.4倍。 (2)在两种介质中,随着载荷比R(或平均应力)的增加,门坎值△K_(th)下降而da/dN增加。 |
【英文摘要】 | The threshold AKth and the fatigue-crack-growth rate da/dN were investigated with LY-12CS aluminum in both 3.5% NaCl Salution and laboratory air. Three load ratios R were selected. That is R=o, 0.33, 0.67. The results showed that the ΔKth for the case of 3.5% NaCl solution was apparently lower than that in laboratory air.However,the da/dN for 3.5% NaCl solution was found to be 1.6 to 3.4 times higher than that in air when the stress intensity range ΔK increased from 7 to 15kg/mm8/2 for all three load ratios… |
【DOI】 | CNKI:SUN:CLGC.0.1981-S2-005 |
【正文快照】 | 一、前 忆兰‘ 口 随着近代宇航科学的发展,飞行器的结构设计已逐渐从系统的“安全寿命设计”准则逐步地过渡到“破损安全设计”准则。为了满足近代飞机设计规范一完整性大纲的要求,多年来国内外许多学者不断地从微观强度理论和宏观弹一塑性力学进行了大量的理论分析和试验研究 |