| 在航空载荷谱作用下2024铝合金的疲劳行为 |
| |
| 引用本文： | 陈亚军,王艾伦,王付胜,王先超.在航空载荷谱作用下2024铝合金的疲劳行为[J].航空材料学报,2016(5):64-69. |
| |
| 作者姓名： | 陈亚军 王艾伦 王付胜 王先超 |
| |
| 作者单位： | 中国民航大学 中欧航空工程师学院,天津,300300 |
| |
| 基金项目： | 国家自然科学基金(51301198)，中央高校基本科研业务费中国民航大学专项(3122015Z002)，中国民航大学实验技术创新基金项目(2016SYCX21) |
| |
| 摘 要： | 研究了在航空载荷谱TWIST作用下2024铝合金的疲劳特性。对航空载荷谱进行简化处理,对比分析了理论推导、MATLAB程序模拟和疲劳试验给出的飞机疲劳寿命预测值,并微观观察疲劳失效断口特征,分析了失效机理。结果表明：理论推导、程序模拟和疲劳试验得到的疲劳寿命预测值分别为163800,158280和134249次飞行循环；程序模拟得到飞机巡航过程中实际阵风载荷和忽略极小波动载荷的疲劳寿命预测值分别为92314和92321次飞行循环；观察疲劳断口可以发现裂纹萌生形核起源于试验件近表面,疲劳裂纹的扩展以沿晶和穿晶两种方式进行,有明显的疲劳条带,在瞬时断裂区呈现韧窝形貌。
|
| 关 键 词： | 铝合金 航空载荷谱 疲劳寿命预测 微观分析 |
Fatigue Behaviors of 2024 Aluminum Alloy under Aviation Load Spectrum |
| |
| Abstract: | The fatigue properties of 2024 aluminum alloy under the influence of TWIST on the aviation load spectrum were studied. The aircraft load spectrum was simplified, and the fatigue life of the aircraft was predicted by theoretical analysis, MATLAB program simu-lation and fatigue was test, and the failure mechanism was observed. The results show that the predicted values of fatigue life are 163800, 158280 and 134249 respectively. Aircraft cruise loads during actual gust load spectrum is simulated, the minimal fluctuation spectrum is ignored. The flight cycles are 92314 and 92321 times respectively. Crack initiation nucleation is originated in the test piece near the surface. Fatigue crack is propagated between intergranular and transcrystalline rupture. Instantaneous, rupture zone and crack propagation can be observed. |
| |
| Keywords: | aluminum alloy aviation load spectrum fatigue life predict microscopic analysis |
| 本文献已被 万方数据 等数据库收录！ |
|
