fatigue limit

简明释义

疲劳极限

英英释义

例句

1.Testing for the fatigue limit involves subjecting materials to cyclic loading.

测试疲劳极限涉及对材料施加循环载荷。

2.Knowing the fatigue limit of steel helps in designing safer structures.

了解钢材的疲劳极限有助于设计更安全的结构。

3.Materials with a high fatigue limit are preferred in aerospace applications.

在航空航天应用中，优先选择具有高疲劳极限的材料。

4.The fatigue limit of aluminum is lower than that of many steels.

铝的疲劳极限低于许多钢材。

5.The engineer calculated the fatigue limit to ensure the bridge could withstand repeated stress.

工程师计算了疲劳极限以确保桥梁能承受反复的压力。

作文

The concept of fatigue limit is crucial in the field of materials science and engineering, particularly when designing components that are subject to cyclic loading. The fatigue limit, also known as the endurance limit, refers to the maximum stress amplitude a material can withstand for an infinite number of loading cycles without experiencing failure. Understanding this concept is essential for engineers who need to ensure the reliability and longevity of structures and mechanical components.When a material is subjected to repeated loading and unloading, it can develop microscopic cracks due to the accumulation of damage over time. These cracks may eventually lead to catastrophic failure if the applied stress exceeds the fatigue limit. Therefore, determining the fatigue limit of a material is vital for predicting its performance under real-world conditions. For example, consider the design of an aircraft wing. The wing experiences continuous fluctuations in load during flight due to changes in aerodynamic forces and turbulence. Engineers must analyze the materials used in the wing structure to ensure they have a suitable fatigue limit. If the materials selected do not have a high enough fatigue limit, the wing could suffer from fatigue failure, leading to severe consequences.To determine the fatigue limit of a material, engineers typically conduct fatigue tests. These tests involve subjecting samples of the material to a series of controlled cyclic loads until failure occurs. By analyzing the results, engineers can establish the fatigue limit and use this information to inform design decisions. It is important to note that the fatigue limit can vary significantly depending on factors such as temperature, surface finish, and the presence of notches or other stress concentrators.In addition to its importance in structural applications, the fatigue limit is also relevant in various industries, including automotive, aerospace, and manufacturing. For instance, in the automotive industry, components like crankshafts, gears, and suspension parts must be designed with their fatigue limit in mind to prevent premature failure during operation. Similarly, in aerospace, turbine blades and landing gear must withstand cyclic stresses while maintaining their integrity over time.Moreover, understanding the fatigue limit can drive innovation in material development. Researchers are continually exploring new alloys and composite materials that exhibit improved fatigue resistance. By enhancing the fatigue limit, these advanced materials can enable the design of lighter and more efficient structures without compromising safety.In conclusion, the fatigue limit is a fundamental concept in engineering that plays a critical role in ensuring the safety and reliability of materials under cyclic loading conditions. As we continue to push the boundaries of technology and design, a thorough understanding of the fatigue limit will remain essential for engineers across various disciplines. By prioritizing fatigue analysis in the design process, we can create more durable and resilient products that withstand the test of time, ultimately benefiting society as a whole.

疲劳极限的概念在材料科学和工程领域中至关重要，特别是在设计承受循环载荷的组件时。疲劳极限，也称为耐久极限，指的是材料在经历无限次加载循环而不发生失效的最大应力幅值。理解这一概念对工程师来说至关重要，他们需要确保结构和机械组件的可靠性和耐用性。当材料受到重复的加载和卸载时，由于时间的损伤累积，可能会产生微观裂纹。如果施加的应力超过了疲劳极限，这些裂纹最终可能导致灾难性的失效。因此，确定材料的疲劳极限对于预测其在现实条件下的性能至关重要。例如，考虑飞机机翼的设计。机翼在飞行过程中由于气动力和湍流的变化而经历持续的载荷波动。工程师必须分析用于机翼结构的材料，以确保它们具有合适的疲劳极限。如果所选材料的疲劳极限不足，机翼可能会遭受疲劳失效，导致严重后果。为了确定材料的疲劳极限，工程师通常会进行疲劳测试。这些测试涉及将材料样本置于一系列受控的循环载荷下，直到发生失效。通过分析结果，工程师可以建立疲劳极限并利用这些信息来指导设计决策。值得注意的是，材料的疲劳极限可能因温度、表面光洁度以及缺口或其他应力集中物的存在而显著变化。除了在结构应用中的重要性，疲劳极限在汽车、航空航天和制造等各个行业中也很相关。例如，在汽车工业中，曲轴、齿轮和悬挂部件等组件必须在设计时考虑其疲劳极限，以防止在操作过程中出现过早失效。同样，在航空航天领域，涡轮叶片和起落架必须承受循环应力，同时保持其完整性。此外，理解疲劳极限可以推动材料开发的创新。研究人员不断探索具有更好疲劳抗性的合金和复合材料。通过增强疲劳极限，这些先进材料可以使设计出更轻、更高效的结构，而不影响安全性。总之，疲劳极限是工程中的一个基本概念，在确保材料在循环载荷条件下的安全性和可靠性方面发挥着关键作用。随着我们不断推动技术和设计的边界，对疲劳极限的透彻理解将继续对各个学科的工程师至关重要。通过在设计过程中优先考虑疲劳分析，我们可以创造出更耐用和更具韧性的产品，能够经受时间的考验，最终使整个社会受益。