repeated stress failure

简明释义

疲劳断裂

英英释义

例句

1.In materials science, repeated stress failure is a critical factor in determining the lifespan of components.

在材料科学中，重复应力失效是决定组件使用寿命的一个关键因素。

2.The engineer explained that the bridge collapsed due to repeated stress failure, which means it couldn't withstand the constant pressure over time.

工程师解释说，桥梁的倒塌是由于重复应力失效，这意味着它无法承受长期的持续压力。

3.To prevent repeated stress failure, engineers often conduct fatigue tests on materials before use.

为了防止重复应力失效，工程师通常在使用之前对材料进行疲劳测试。

4.The aerospace industry pays close attention to repeated stress failure to ensure the safety of aircraft.

航空航天工业密切关注重复应力失效以确保飞机的安全。

5.The manufacturer recalled the product after discovering it was prone to repeated stress failure under certain conditions.

制造商在发现该产品在某些条件下容易发生重复应力失效后进行了召回。

作文

In the field of engineering, understanding the concepts that govern material behavior under various conditions is crucial. One such concept is repeated stress failure, which refers to the phenomenon where materials fail or fracture after being subjected to repeated loading and unloading cycles. This type of failure is particularly significant in structures and components that experience fluctuating stresses during their service life. For instance, consider a bridge that experiences the constant weight of vehicles passing over it. Over time, the materials used in the construction of the bridge may begin to show signs of fatigue due to the repeated stress failure caused by this cyclical loading. The mechanics behind repeated stress failure involve the accumulation of damage within the material. Each time the material is loaded, microscopic cracks may form. If these cracks are not allowed to heal and the loading continues, they can propagate, leading to larger fractures that ultimately result in failure. This is why engineers must carefully consider the materials they use and the expected load conditions when designing structures. To mitigate the risks associated with repeated stress failure, engineers often employ various strategies. One common approach is to select materials that have high fatigue resistance, meaning they can withstand repeated loading without significant degradation. Additionally, design modifications, such as incorporating fillets or reducing stress concentrations, can help distribute loads more evenly and minimize the risk of crack initiation. Another important aspect of addressing repeated stress failure is conducting thorough testing and analysis. Engineers use techniques such as finite element analysis (FEA) to simulate how materials will behave under different loading conditions. By understanding the points at which failure is likely to occur, engineers can make informed decisions about design and material selection. Moreover, regular maintenance and inspection of structures can play a vital role in preventing repeated stress failure. By monitoring for signs of wear and fatigue, engineers can address potential issues before they lead to catastrophic failures. For example, a routine inspection of a bridge might reveal small cracks that could be repaired before they grow larger and compromise the integrity of the structure. In conclusion, repeated stress failure is a critical consideration in engineering, especially for structures subjected to cyclic loads. Understanding the mechanisms behind this type of failure, selecting appropriate materials, employing sound design practices, and conducting regular inspections are all essential strategies in ensuring the safety and longevity of engineered structures. By prioritizing these factors, engineers can help prevent failures that could have devastating consequences for both people and infrastructure.

在工程领域，理解支配材料在各种条件下行为的概念至关重要。其中一个概念是重复应力失效，它指的是材料在经历重复加载和卸载周期后发生失效或断裂的现象。这种类型的失效在经历波动应力的结构和部件中尤为重要。例如，考虑一座经历车辆不断通过的桥梁。随着时间的推移，桥梁建设中使用的材料可能会因这种周期性加载造成的重复应力失效而开始出现疲劳迹象。重复应力失效背后的机制涉及材料内部损伤的积累。每次加载时，微观裂缝可能会形成。如果这些裂缝没有得到修复并继续加载，它们可能会扩展，导致更大的断裂，最终导致失效。这就是为什么工程师在设计结构时必须仔细考虑所用材料和预期荷载条件。为了减轻与重复应力失效相关的风险，工程师通常会采用各种策略。一种常见的方法是选择具有高疲劳抗力的材料，这意味着它们能够承受重复加载而不会显著退化。此外，设计修改，例如加入圆角或减少应力集中，可以帮助更均匀地分配负荷，并最小化裂纹产生的风险。处理重复应力失效的另一个重要方面是进行彻底的测试和分析。工程师使用有限元分析（FEA）等技术来模拟材料在不同加载条件下的行为。通过了解可能发生失效的点，工程师可以就设计和材料选择做出明智的决定。此外，定期维护和检查结构在防止重复应力失效方面也发挥着至关重要的作用。通过监测磨损和疲劳的迹象，工程师可以在潜在问题导致灾难性失效之前解决它们。例如，对桥梁的例行检查可能会发现小裂缝，这些裂缝可以在变大并危及结构完整性之前进行修复。总之，重复应力失效是工程中一个关键的考虑因素，尤其是对于受到周期性荷载的结构。理解这种失效类型背后的机制、选择合适的材料、采用合理的设计实践以及定期检查都是确保工程结构安全和持久性的基本策略。通过优先考虑这些因素，工程师可以帮助防止可能对人和基础设施造成严重后果的失效。