fatigue life

简明释义

疲劳损坏期限

英英释义

例句

1.Understanding the fatigue life of materials is crucial in aerospace design.

理解材料的疲劳寿命在航空航天设计中至关重要。

2.Regular testing helps to determine the fatigue life of the bridge under heavy traffic conditions.

定期测试有助于确定桥梁在重交通条件下的疲劳寿命。

3.The engineer calculated the fatigue life of the metal component to ensure it would withstand repeated stress.

工程师计算了金属部件的疲劳寿命以确保其能承受反复的应力。

4.Manufacturers often provide data on the fatigue life of their products to assure customers of quality.

制造商通常提供其产品的疲劳寿命数据，以向客户保证质量。

5.The fatigue life of a tire can significantly affect vehicle safety and performance.

轮胎的疲劳寿命可以显著影响车辆的安全性和性能。

作文

Understanding the concept of fatigue life is crucial in various engineering fields, particularly in materials science and structural engineering. The term fatigue life refers to the duration or number of cycles a material can endure under fluctuating stress before failure occurs. This phenomenon is particularly important for components that are subjected to repeated loading and unloading, such as those found in bridges, aircraft, and machinery. As engineers, our goal is to design structures and components that can withstand these stresses over their expected lifespan without experiencing catastrophic failure.The study of fatigue life involves examining how materials behave under cyclic loading. Unlike static loads, where the force applied remains constant, cyclic loads vary over time, which can lead to the gradual deterioration of materials. When materials are exposed to repeated stress, microscopic cracks can form, grow, and eventually lead to complete failure. Understanding the mechanisms behind this process allows engineers to predict the lifespan of a component and make informed decisions about material selection and design.One of the key factors influencing fatigue life is the material's inherent properties, such as its strength, ductility, and toughness. Different materials respond differently to cyclic loading; for instance, metals typically exhibit a distinct fatigue limit, while polymers may not have a defined limit. By conducting fatigue tests, engineers can gather data on how long a material can last under specific loading conditions, which is essential for ensuring safety and reliability in design.Moreover, environmental factors also play a significant role in determining fatigue life. For example, temperature fluctuations, humidity, and exposure to corrosive substances can accelerate the degradation of materials. Engineers must consider these factors when designing components for use in harsh environments, as they can significantly reduce the fatigue life of a material.In practical applications, the concept of fatigue life is used to inform maintenance schedules and inspection protocols. For instance, in the aviation industry, aircraft undergo regular inspections to assess the condition of critical components. By understanding the fatigue life of these components, engineers can predict when maintenance is required, preventing potential failures that could compromise safety.In conclusion, mastering the concept of fatigue life is essential for engineers and designers involved in creating durable and reliable structures. By comprehensively understanding the factors that affect fatigue life, including material properties and environmental conditions, professionals can enhance the longevity and safety of their designs. This knowledge not only contributes to the efficiency of engineering projects but also plays a vital role in protecting lives and investments in various industries.

理解疲劳寿命的概念在多个工程领域中至关重要，特别是在材料科学和结构工程中。术语疲劳寿命指的是材料在承受波动应力之前能够承受的持续时间或循环次数。这一现象对于那些经历重复加载和卸载的组件尤为重要，例如桥梁、飞机和机械中的部件。作为工程师，我们的目标是设计出能够在预期使用寿命内承受这些应力而不发生灾难性故障的结构和组件。对疲劳寿命的研究涉及考察材料在循环加载下的行为。与静态载荷不同，静态载荷施加的力保持不变，循环载荷随时间变化，这可能导致材料的逐渐劣化。当材料暴露于重复应力时，微观裂纹可能形成、扩展，最终导致完全失效。理解这一过程背后的机制使工程师能够预测组件的使用寿命，并就材料选择和设计做出明智的决策。影响疲劳寿命的关键因素之一是材料的固有特性，如强度、延展性和韧性。不同材料对循环加载的反应各不相同；例如，金属通常表现出明显的疲劳极限，而聚合物可能没有明确的极限。通过进行疲劳测试，工程师可以收集有关材料在特定加载条件下能够持续多长时间的数据，这对确保设计的安全性和可靠性至关重要。此外，环境因素也在确定疲劳寿命中发挥着重要作用。例如，温度波动、湿度和暴露于腐蚀性物质中都可能加速材料的降解。工程师在为恶劣环境设计组件时，必须考虑这些因素，因为它们会显著降低材料的疲劳寿命。在实际应用中，疲劳寿命的概念用于通知维护计划和检查协议。例如，在航空工业中，飞机会定期检查以评估关键组件的状况。通过了解这些组件的疲劳寿命，工程师可以预测何时需要进行维护，从而防止可能导致安全隐患的故障。总之，掌握疲劳寿命的概念对于参与创建耐用和可靠结构的工程师和设计师至关重要。通过全面理解影响疲劳寿命的因素，包括材料特性和环境条件，专业人士可以增强其设计的耐久性和安全性。这一知识不仅有助于提高工程项目的效率，还有助于保护各行业的生命和投资。