fatigue strength

简明释义

疲劳强度

英英释义

例句

1.Understanding the fatigue strength of metals is crucial in aerospace applications.

理解金属的疲劳强度在航空航天应用中至关重要。

2.In construction, the fatigue strength of materials affects the longevity of structures.

在建筑中，材料的疲劳强度影响结构的耐久性。

3.The engineer calculated the fatigue strength of the material to ensure it could withstand repeated stress.

工程师计算了材料的疲劳强度以确保其能够承受重复的应力。

4.Testing for fatigue strength can help predict when a component will fail.

测试疲劳强度可以帮助预测组件何时会失效。

5.The fatigue strength of this alloy is significantly higher than that of pure metal.

这种合金的疲劳强度明显高于纯金属。

作文

Fatigue strength is a critical concept in materials science and engineering, referring to the maximum stress that a material can withstand for a specified number of cycles without failing. This property is particularly important for components that are subjected to repeated loading and unloading, such as in automotive, aerospace, and structural applications. Understanding fatigue strength (疲劳强度) is essential for engineers to design safe and reliable structures and machinery.When materials are exposed to cyclic loading, they can experience fatigue failure even at stress levels lower than their ultimate tensile strength. This phenomenon occurs because microscopic cracks can initiate and propagate within the material over time, leading to eventual fracture. Therefore, it is vital to consider fatigue strength (疲劳强度) when selecting materials for specific applications, especially those that will undergo repetitive stress.The process of determining the fatigue strength (疲劳强度) of a material typically involves conducting fatigue tests. In these tests, samples are subjected to controlled cyclic loading until failure occurs. The results are then plotted on a S-N curve, which illustrates the relationship between the applied stress (S) and the number of cycles to failure (N). This curve provides valuable information about the endurance limit of the material, which is the maximum stress level below which the material can theoretically endure an infinite number of cycles without failing.Different materials exhibit varying fatigue strength (疲劳强度) characteristics. For instance, metals generally have a well-defined fatigue limit, while polymers and composites may not. Additionally, factors such as surface finish, temperature, and environmental conditions can significantly influence a material's fatigue performance. Engineers must account for these variables when designing components to ensure they meet the required safety and durability standards.In practical applications, understanding fatigue strength (疲劳强度) helps engineers to perform life predictions for components. By knowing the expected loading conditions and the material properties, they can estimate how long a component will last under service conditions. This predictive capability is crucial in industries where safety is paramount, such as aerospace, where failures can have catastrophic consequences.Moreover, advancements in material science have led to the development of high-performance alloys and composite materials with enhanced fatigue strength (疲劳强度). These innovations allow for lighter and more efficient designs, contributing to improved fuel efficiency and overall performance in vehicles and aircraft. As technologies continue to evolve, the importance of understanding and improving fatigue strength (疲劳强度) will remain a key focus for engineers and researchers alike.In conclusion, fatigue strength (疲劳强度) is a fundamental property that plays a vital role in the design and analysis of materials subjected to cyclic loading. Its significance cannot be overstated, as it directly impacts the safety, reliability, and longevity of various engineering applications. By studying and applying the principles of fatigue strength (疲劳强度), engineers can create more resilient structures and systems, ultimately leading to safer and more efficient technologies.

疲劳强度是材料科学和工程中的一个关键概念，指的是材料在特定循环次数内能够承受的最大应力而不发生失效的能力。这个属性对于那些受到重复加载和卸载的组件尤为重要，例如汽车、航空航天和结构应用。理解疲劳强度（fatigue strength）对工程师设计安全可靠的结构和机械至关重要。当材料暴露于循环加载时，即使在其极限抗拉强度以下，它们也可能经历疲劳失效。这种现象的发生是因为微观裂纹可以在材料内部逐渐产生并扩展，最终导致断裂。因此，在选择特定应用的材料时，考虑疲劳强度（fatigue strength）是至关重要的，尤其是那些将经历重复应力的材料。确定材料的疲劳强度（fatigue strength）通常涉及进行疲劳测试。在这些测试中，样品在控制的循环加载下直至失效。结果随后被绘制在S-N曲线上，展示施加应力(S)与失效循环次数(N)之间的关系。该曲线提供了有关材料耐久极限的有价值信息，即在理论上材料可以承受无限次循环而不失效的最大应力水平。不同材料表现出不同的疲劳强度（fatigue strength）特性。例如，金属通常具有明确的疲劳极限，而聚合物和复合材料可能没有。此外，表面处理、温度和环境条件等因素也会显著影响材料的疲劳性能。工程师在设计组件时必须考虑这些变量，以确保它们符合所需的安全性和耐久性标准。在实际应用中，理解疲劳强度（fatigue strength）帮助工程师对组件进行使用寿命预测。通过了解预期的加载条件和材料特性，他们可以估算组件在服务条件下的使用寿命。这种预测能力在安全至关重要的行业中至关重要，例如航空航天，失效可能导致灾难性后果。此外，材料科学的进步导致开发出具有增强疲劳强度（fatigue strength）的高性能合金和复合材料。这些创新使得更轻便和更高效的设计成为可能，有助于提高车辆和飞机的燃油效率和整体性能。随着技术的不断发展，理解和改善疲劳强度（fatigue strength）的重要性将始终是工程师和研究人员关注的重点。总之，疲劳强度（fatigue strength）是一个基本属性，在设计和分析受到循环加载的材料时发挥着至关重要的作用。它的重要性不容小觑，因为它直接影响到各种工程应用的安全性、可靠性和耐用性。通过研究和应用疲劳强度（fatigue strength）的原理，工程师可以创造出更具韧性的结构和系统，最终导致更安全和更高效的技术。