endurance limit

简明释义

耐久极限

英英释义

例句

1.The endurance limit of concrete is significantly lower than that of steel, making it important to choose the right material for construction.

混凝土的耐久极限明显低于钢材，因此选择合适的建筑材料非常重要。

2.In fatigue testing, the endurance limit helps predict how many cycles a component can endure before failure.

在疲劳测试中，耐久极限有助于预测组件在失效之前可以承受多少个循环。

3.Understanding the endurance limit of materials is crucial in designing long-lasting structures.

理解材料的耐久极限对于设计持久的结构至关重要。

4.By calculating the endurance limit, engineers can ensure that the design will not fail under cyclic loading.

通过计算耐久极限，工程师可以确保设计在循环载荷下不会失效。

5.The engineer tested the metal to determine its endurance limit, which is the maximum stress it can withstand without failing.

工程师测试了金属以确定其耐久极限，这是它在不失效的情况下可以承受的最大应力。

作文

The concept of endurance limit plays a crucial role in materials science and engineering. It refers to the maximum stress that a material can withstand for an infinite number of loading cycles without failing. In simpler terms, it is the threshold below which a material can endure repeated stress without experiencing fatigue failure. Understanding the endurance limit is essential for engineers and designers who are tasked with creating components that will be subjected to cyclic loading conditions, such as in bridges, aircraft, and machinery.When a material is subjected to repeated loading and unloading, it can develop microscopic cracks over time. If the applied stress remains below the endurance limit, these cracks may not propagate, and the material can continue to perform its function effectively. However, if the stress exceeds this limit, the material is likely to fail due to fatigue, often resulting in catastrophic consequences.To illustrate the importance of the endurance limit, consider the case of a bicycle frame. When a cyclist rides, the frame experiences various forces due to the rider's weight and the terrain. If the frame is designed with materials that have a low endurance limit, it may eventually suffer from fatigue cracks, leading to a potential failure during use. Therefore, engineers must select materials with suitable endurance limits to ensure safety and longevity.Different materials exhibit different endurance limits. For example, steel generally has a higher endurance limit compared to aluminum. This difference is crucial when selecting materials for applications where fatigue resistance is paramount. Engineers often conduct tests to determine the endurance limit of materials, using methods such as rotating beam tests or axial loading tests. These experiments help them establish safe design parameters to prevent material failure.Moreover, the endurance limit can be influenced by several factors, including the material's microstructure, the presence of defects, and environmental conditions. For instance, a material with a fine-grained structure may exhibit a higher endurance limit than one with a coarse structure. Additionally, factors like temperature, humidity, and corrosive environments can also affect the fatigue properties of materials, making it essential for engineers to consider these aspects during the design process.In conclusion, the endurance limit is a fundamental concept that underscores the importance of material selection and design in engineering applications. By understanding and applying the principles related to the endurance limit, engineers can create safer and more reliable structures and components that withstand the test of time. The implications of neglecting the endurance limit can be severe, leading to failures that could endanger lives and result in significant economic losses. Therefore, it is imperative for professionals in the field to have a thorough understanding of this concept and its practical applications.

“耐久极限”这一概念在材料科学和工程中扮演着至关重要的角色。它指的是材料在无限次加载循环中能够承受的最大应力，而不会发生故障。简单来说，它是材料在经历重复应力而不发生疲劳失效的阈值。理解“耐久极限”对于工程师和设计师来说至关重要，他们需要创建将在循环加载条件下使用的部件，例如在桥梁、飞机和机械中。当材料受到重复加载和卸载时，它可能会随着时间的发展而产生微观裂纹。如果施加的应力保持在“耐久极限”以下，这些裂纹可能不会扩展，材料可以继续有效地执行其功能。然而，如果应力超过了这一极限，材料就可能因疲劳而失效，通常导致灾难性的后果。为了说明“耐久极限”的重要性，可以考虑自行车框架的案例。当骑自行车时，框架会因骑行者的体重和地形而经历各种力量。如果框架使用的材料具有较低的“耐久极限”，它最终可能会因疲劳裂纹而受到损害，从而在使用过程中潜在地发生故障。因此，工程师必须选择具有合适“耐久极限”的材料，以确保安全和耐用性。不同材料表现出不同的“耐久极限”。例如，钢材通常具有比铝材更高的“耐久极限”。这一差异在选择对疲劳抗性要求较高的应用材料时至关重要。工程师通常进行测试以确定材料的“耐久极限”，使用旋转梁试验或轴向加载试验等方法。这些实验帮助他们建立安全设计参数，以防止材料失效。此外，“耐久极限”还可能受到多种因素的影响，包括材料的微观结构、缺陷的存在以及环境条件。例如，具有细晶结构的材料可能表现出比粗晶结构的材料更高的“耐久极限”。此外，温度、湿度和腐蚀性环境等因素也可能影响材料的疲劳性能，因此工程师在设计过程中必须考虑这些方面。总之，“耐久极限”是一个基本概念，强调了材料选择和设计在工程应用中的重要性。通过理解和应用与“耐久极限”相关的原则，工程师可以创造出更加安全和可靠的结构和部件，能够经受时间的考验。忽视“耐久极限”的后果可能是严重的，导致可能危及生命的故障，并造成重大经济损失。因此，专业人士必须深入理解这一概念及其实际应用。