fatigue durability

简明释义

耐疲劳性

英英释义

例句

1.In aerospace engineering, fatigue durability 疲劳耐久性 is essential for ensuring the longevity of aircraft structures.

在航空工程中，疲劳耐久性对于确保飞机结构的长期使用至关重要。

2.The new alloy was tested for its fatigue durability 疲劳耐久性 under extreme conditions.

新合金在极端条件下测试了其疲劳耐久性。

3.Engineers must consider fatigue durability 疲劳耐久性 when designing components that will undergo repeated stress.

工程师在设计将承受重复应力的组件时，必须考虑疲劳耐久性。

4.Testing the fatigue durability 疲劳耐久性 of materials can prevent catastrophic failures in machinery.

测试材料的疲劳耐久性可以防止机械设备的灾难性故障。

5.The bridge's fatigue durability 疲劳耐久性 was a critical factor in its safety assessment.

桥梁的疲劳耐久性是其安全评估中的一个关键因素。

作文

In the field of engineering and materials science, the term fatigue durability refers to a material's ability to withstand repeated loading and unloading cycles without failing. This characteristic is crucial for components that experience fluctuating stresses during their operational life. For instance, in the automotive industry, parts such as axles, springs, and gears are subjected to continuous stress from driving conditions, making fatigue durability an essential property for ensuring safety and performance.The concept of fatigue durability can be understood through the S-N curve, which plots the number of cycles a material can endure against the applied stress level. As the stress level increases, the number of cycles to failure typically decreases. This relationship illustrates that materials designed for high fatigue durability must be able to sustain significant loads over extended periods without succumbing to fatigue failure.One of the key factors affecting fatigue durability is the microstructure of the material. For example, metals with fine grains often exhibit better fatigue resistance compared to those with coarse grains. This is because finer grains can impede the movement of dislocations, which are defects within the crystal structure that can lead to failure under cyclic loading. Therefore, understanding the microstructural properties of materials is vital for engineers who aim to enhance fatigue durability.Another important aspect to consider is the role of surface treatments in improving fatigue durability. Techniques such as shot peening or surface hardening can significantly increase the lifespan of components by introducing compressive residual stresses on the surface, which counteract the tensile stresses that occur during operation. By enhancing the surface condition, engineers can effectively improve the fatigue durability of critical components, thereby increasing their overall reliability.Moreover, the environment in which a material operates can also impact its fatigue durability. Factors such as temperature fluctuations, corrosive environments, and the presence of notches or defects can reduce a material's ability to withstand cyclic loads. Engineers must consider these external factors when designing components to ensure they meet the necessary fatigue durability requirements.In conclusion, fatigue durability is a fundamental property that determines the longevity and safety of materials used in various applications. By understanding the factors that influence this characteristic, engineers can design more reliable and efficient components. As technology advances, the importance of enhancing fatigue durability will continue to grow, especially in industries where safety and performance are paramount. Through ongoing research and development, we can expect to see improvements in materials that offer superior fatigue durability, ultimately leading to safer and more efficient products in our daily lives.

在工程和材料科学领域，术语疲劳耐久性指的是材料在经历重复加载和卸载循环时不发生破坏的能力。这一特性对于在其操作生命周期中经历波动应力的组件至关重要。例如，在汽车工业中，车轴、弹簧和齿轮等部件在驾驶条件下会持续承受应力，因此疲劳耐久性成为确保安全和性能的重要属性。疲劳耐久性的概念可以通过S-N曲线来理解，该曲线绘制了材料能够承受的循环次数与施加的应力水平之间的关系。随着应力水平的增加，破坏前的循环次数通常会减少。这一关系表明，设计具有高疲劳耐久性的材料必须能够在较长时间内承受显著的负荷而不出现疲劳失效。影响疲劳耐久性的关键因素之一是材料的微观结构。例如，细晶粒的金属通常比粗晶粒的金属表现出更好的疲劳抗性。这是因为细晶粒可以阻碍位错的运动，而位错是晶体结构中的缺陷，可能导致在循环加载下的失效。因此，理解材料的微观结构特性对旨在增强疲劳耐久性的工程师至关重要。另一个重要方面是表面处理在提高疲劳耐久性中的作用。诸如喷丸或表面硬化等技术可以通过在表面引入压缩残余应力显著延长组件的使用寿命，这些残余应力可以抵消在操作过程中出现的拉伸应力。通过改善表面状态，工程师可以有效提高关键组件的疲劳耐久性，从而增加其整体可靠性。此外，材料所处的环境也会影响其疲劳耐久性。温度波动、腐蚀环境以及缺口或缺陷的存在等因素都可能降低材料承受循环载荷的能力。工程师在设计组件时必须考虑这些外部因素，以确保它们满足必要的疲劳耐久性要求。总之，疲劳耐久性是决定材料在各种应用中使用寿命和安全性的基本属性。通过理解影响这一特性的因素，工程师可以设计出更可靠和高效的组件。随着技术的进步，提高疲劳耐久性的重要性将继续增长，尤其是在安全和性能至关重要的行业中。通过持续的研究和开发，我们可以期待看到在提供优越疲劳耐久性的材料方面的改进，最终导致我们日常生活中更安全和更高效的产品。