fatigue life

简明释义

披劳寿命

英英释义

例句

1.Understanding the fatigue life of materials is crucial for aerospace applications.

了解材料的疲劳寿命对于航空航天应用至关重要。

2.The engineer calculated the fatigue life of the bridge to ensure its safety over time.

工程师计算了桥梁的疲劳寿命以确保其长期安全。

3.The team used simulations to predict the fatigue life of the new alloy.

团队使用模拟来预测新合金的疲劳寿命。

4.Manufacturers often test the fatigue life of their products to meet industry standards.

制造商通常测试其产品的疲劳寿命以满足行业标准。

5.A longer fatigue life means fewer replacements and lower costs in the long run.

更长的疲劳寿命意味着更少的更换和更低的长期成本。

作文

In the field of engineering and materials science, the term fatigue life refers to the duration or number of cycles that a material or structure can withstand under repeated loading before it fails. This concept is crucial for understanding how materials behave under stress and is particularly important in industries such as aerospace, automotive, and civil engineering. The fatigue life of a material is influenced by various factors, including the type of material, the magnitude of the applied load, the frequency of loading, and the environment in which the material operates. When engineers design components that will experience cyclic loading, they must consider the fatigue life to ensure safety and reliability. For example, an airplane wing undergoes constant stress during flight due to changes in air pressure and turbulence. If the fatigue life of the materials used in the wing is not adequately assessed, it could lead to catastrophic failure, endangering passengers and crew. Therefore, understanding the fatigue life is essential for preventing such disasters.To determine the fatigue life of a material, engineers often conduct fatigue tests, which involve subjecting samples to repeated loading until they fail. These tests help establish S-N curves, which plot the number of cycles to failure against the stress amplitude. By analyzing these curves, engineers can predict the fatigue life of materials under specific conditions, allowing for more informed design decisions.Moreover, the fatigue life can be improved through various methods, such as surface treatments, alloying, and optimizing the geometry of components. For instance, shot peening is a process that introduces compressive stresses on the surface of a material, effectively increasing its fatigue life. Similarly, using higher quality alloys can enhance the performance of components subjected to cyclic loads.In addition to mechanical applications, the concept of fatigue life also extends to biological systems. For instance, human bones can experience fatigue due to repetitive activities, leading to stress fractures. Understanding the fatigue life of bones can help in developing better rehabilitation strategies and preventive measures for athletes.In conclusion, the concept of fatigue life is integral to the fields of engineering and materials science. It provides critical insights into how materials respond to cyclic loading and helps engineers design safer and more reliable structures. By understanding and improving the fatigue life of materials, we can enhance the performance and longevity of various products, ultimately contributing to technological advancement and safety in our daily lives.

在工程和材料科学领域，术语疲劳寿命指的是材料或结构在重复加载下能够承受的持续时间或循环次数，直到其失效。这个概念对于理解材料在应力下的行为至关重要，尤其在航空航天、汽车和土木工程等行业中尤为重要。材料的疲劳寿命受多种因素的影响，包括材料类型、施加负荷的大小、加载频率以及材料所处的环境。当工程师设计会经历循环加载的组件时，他们必须考虑疲劳寿命以确保安全性和可靠性。例如，飞机机翼在飞行过程中由于气压变化和湍流而不断承受压力。如果机翼使用的材料的疲劳寿命没有得到充分评估，可能会导致灾难性的故障，危及乘客和机组人员的安全。因此，理解疲劳寿命对于防止此类灾难至关重要。为了确定材料的疲劳寿命，工程师通常会进行疲劳测试，这涉及将样品施加重复负荷，直到它们失效。这些测试有助于建立S-N曲线，该曲线绘制了到失效的循环次数与应力幅值之间的关系。通过分析这些曲线，工程师可以预测材料在特定条件下的疲劳寿命，从而做出更明智的设计决策。此外，通过各种方法可以提高疲劳寿命，例如表面处理、合金化和优化组件几何形状。例如，喷丸是一种在材料表面引入压应力的工艺，有效地增加了其疲劳寿命。同样，使用更高质量的合金可以增强承受循环负荷的组件的性能。除了机械应用之外，疲劳寿命的概念也延伸到生物系统。例如，由于重复活动，人类骨骼可能会经历疲劳，导致应力性骨折。理解骨骼的疲劳寿命可以帮助制定更好的康复策略和运动员的预防措施。总之，疲劳寿命的概念是工程和材料科学领域不可或缺的一部分。它提供了关于材料如何响应循环加载的关键见解，并帮助工程师设计更安全、更可靠的结构。通过理解和改善材料的疲劳寿命，我们可以提高各种产品的性能和寿命，从而最终促进技术进步和我们日常生活中的安全。