fatigue limit

简明释义

疲劳极限

英英释义

例句

1.During testing, the team discovered that the fatigue limit of the alloy was much higher than expected.

在测试过程中，团队发现合金的疲劳极限远高于预期。

2.The engineer calculated the fatigue limit to ensure the bridge could withstand repeated stress without failure.

工程师计算了疲劳极限以确保桥梁能够承受反复的压力而不发生故障。

3.The fatigue limit can significantly affect the lifespan of mechanical parts in machinery.

在机械设备中，疲劳极限会显著影响机械部件的使用寿命。

4.Manufacturers often specify the fatigue limit of components to ensure safety and reliability.

制造商通常会指定组件的疲劳极限以确保安全和可靠性。

5.Understanding the fatigue limit of materials is crucial in aerospace engineering.

理解材料的疲劳极限在航空航天工程中至关重要。

作文

The concept of fatigue limit is crucial in the field of materials science and engineering. It refers to the maximum stress level that a material can withstand for an infinite number of loading cycles without experiencing fatigue failure. Understanding the fatigue limit is essential for engineers who design components that are subjected to repeated loading, such as bridges, aircraft wings, and automotive parts. When a material is repeatedly stressed, it can develop microscopic cracks that grow over time, eventually leading to catastrophic failure. The fatigue limit helps determine the safe operational limits for these materials, ensuring their reliability and longevity.In practical applications, the fatigue limit is often determined through rigorous testing. Engineers conduct experiments where a sample material is subjected to cyclic loading until it fails. By analyzing the stress levels at which the material endures the most cycles without failure, they can establish its fatigue limit. This information is vital for selecting appropriate materials for specific applications, as different materials exhibit varying fatigue limits. For instance, metals like steel typically have well-defined fatigue limits, while some polymers may not show a clear limit and can fail at lower stress levels.Moreover, factors such as temperature, surface finish, and environmental conditions can significantly influence the fatigue limit of a material. For example, a rough surface can act as a stress concentrator, reducing the fatigue limit and making the material more susceptible to failure. Therefore, engineers must consider these variables during the design process to ensure that the materials used will perform safely under expected conditions.Another important aspect of the fatigue limit is its role in life prediction models. By understanding the fatigue limit, engineers can predict how long a component will last under specific loading conditions. This predictive capability is vital for maintenance planning and can help avoid unexpected failures in critical infrastructure. For example, in the aerospace industry, knowing the fatigue limit of aircraft components allows engineers to schedule regular inspections and replacements, enhancing safety and performance.In conclusion, the fatigue limit is a fundamental concept in materials engineering that plays a significant role in ensuring the safety and reliability of structures and components subjected to cyclic loading. By understanding and applying the principles associated with the fatigue limit, engineers can make informed decisions about material selection, design, and maintenance strategies. This knowledge not only helps prevent catastrophic failures but also contributes to the efficient use of resources in engineering practices. As technology continues to advance, ongoing research into the fatigue limit of new materials will be essential for developing safer and more durable products across various industries.

疲劳极限的概念在材料科学和工程领域中至关重要。它指的是一种材料在无限次加载循环中能够承受而不发生疲劳破坏的最大应力水平。理解疲劳极限对于设计受到重复加载的部件（如桥梁、飞机机翼和汽车零件）的工程师来说至关重要。当一种材料反复受到应力时，它可能会发展出微观裂纹，随着时间的推移，这些裂纹会不断增长，最终导致灾难性的失败。疲劳极限有助于确定这些材料的安全操作限制，从而确保它们的可靠性和使用寿命。在实际应用中，疲劳极限通常通过严格的测试来确定。工程师进行实验，让样品材料在循环加载下直至失败。通过分析材料在经历最多循环而不失败时的应力水平，他们可以建立其疲劳极限。这些信息对于选择特定应用的合适材料至关重要，因为不同材料表现出不同的疲劳极限。例如，钢等金属通常具有明确的疲劳极限，而某些聚合物可能没有明显的极限，并且在较低的应力水平下就会失败。此外，温度、表面光洁度和环境条件等因素也会显著影响材料的疲劳极限。例如，粗糙的表面可以作为应力集中器，降低疲劳极限，使材料更容易发生故障。因此，工程师在设计过程中必须考虑这些变量，以确保所用材料在预期条件下能够安全运行。疲劳极限的另一个重要方面是它在寿命预测模型中的作用。通过了解疲劳极限，工程师可以预测在特定加载条件下部件的使用寿命。这种预测能力对于维护计划至关重要，可以帮助避免关键基础设施中的意外故障。例如，在航空航天工业中，了解飞机部件的疲劳极限使工程师能够安排定期检查和更换，从而提高安全性和性能。总之，疲劳极限是材料工程中的一个基本概念，在确保承受循环加载的结构和组件的安全性和可靠性方面发挥着重要作用。通过理解和应用与疲劳极限相关的原则，工程师可以在材料选择、设计和维护策略方面做出明智的决策。这一知识不仅有助于防止灾难性故障，还有助于在工程实践中有效利用资源。随着技术的不断进步，对新材料疲劳极限的持续研究将对开发各行业更安全、更耐用的产品至关重要。