thermal fatigue

简明释义

热疲劳

英英释义

例句

1.The study focused on how thermal fatigue 热疲劳 affects the lifespan of aerospace components.

该研究集中于热疲劳如何影响航空航天组件的使用寿命。

2.To prevent thermal fatigue 热疲劳, engineers designed the material to withstand extreme temperature variations.

为了防止热疲劳，工程师设计了能够承受极端温度变化的材料。

3.Regular maintenance is essential to monitor thermal fatigue 热疲劳 in high-performance engines.

定期维护对于监测高性能发动机中的热疲劳至关重要。

4.The engine components experienced significant thermal fatigue 热疲劳 due to repeated heating and cooling cycles.

由于反复的加热和冷却周期，发动机组件经历了显著的热疲劳。

5.Excessive thermal fatigue 热疲劳 can lead to cracks in metal parts, compromising their integrity.

过度的热疲劳可能导致金属部件出现裂缝，从而影响其完整性。

作文

Thermal fatigue is a critical concept in materials science and engineering, especially when dealing with components that are subjected to varying temperatures during their service life. This phenomenon occurs when materials experience repeated thermal cycling, leading to the development of cracks and eventual failure. Understanding thermal fatigue (热疲劳) is essential for engineers who design systems that operate under extreme conditions, such as jet engines, nuclear reactors, and even everyday appliances like ovens and heaters.The process of thermal fatigue (热疲劳) can be explained through the mechanics of thermal expansion and contraction. When materials are heated, they expand; conversely, when they cool, they contract. This cycle of expansion and contraction can create stress within the material, particularly at points where there are irregularities or weaknesses. Over time, these stresses accumulate, leading to microscopic cracks that can grow larger with each thermal cycle.One of the most significant challenges in managing thermal fatigue (热疲劳) is predicting when and how it will occur. Different materials respond differently to thermal cycling, and factors such as the rate of temperature change, the maximum and minimum temperatures reached, and the material's inherent properties all play a role. For instance, metals typically have high thermal conductivity, which allows them to dissipate heat quickly, but they also have a tendency to expand and contract significantly, making them susceptible to thermal fatigue (热疲劳). On the other hand, ceramics may not expand as much, but they are more brittle and can fail suddenly without much warning.To mitigate the effects of thermal fatigue (热疲劳), engineers often employ various strategies. One common approach is to use materials that have been specifically designed to withstand thermal cycling. These materials may include alloys that exhibit improved resistance to thermal stresses or composites that combine different materials to enhance performance. Additionally, careful design considerations, such as avoiding sharp corners or notches in components, can help reduce stress concentrations that lead to thermal fatigue (热疲劳).Another important aspect of addressing thermal fatigue (热疲劳) is regular maintenance and monitoring of components. In many applications, especially in aerospace and power generation, components are subjected to rigorous inspection protocols to detect early signs of fatigue. Technologies such as non-destructive testing (NDT) can be employed to identify cracks before they propagate to a point of failure. This proactive approach helps ensure safety and reliability in systems where thermal fatigue (热疲劳) could lead to catastrophic failures.In conclusion, thermal fatigue (热疲劳) is a significant concern in the design and maintenance of materials used in high-temperature applications. By understanding the mechanisms behind this phenomenon and implementing appropriate strategies, engineers can enhance the durability and safety of critical components. As technology advances, ongoing research into new materials and methods will continue to improve our ability to manage thermal fatigue (热疲劳) and extend the lifespan of engineered systems.