lower yield point

简明释义

下屈服点

英英释义

例句

1.When subjected to high temperatures, some plastics exhibit a lower yield point 较低屈服点 than at room temperature.

在高温下，一些塑料的较低屈服点比室温下要低。

2.A lower yield point 较低屈服点 can lead to early failure in mechanical components.

较低的屈服点可能导致机械部件的早期失效。

3.In materials science, a metal with a lower yield point 较低屈服点 may deform more easily under stress.

在材料科学中，具有较低屈服点的金属在应力下可能更容易变形。

4.The alloy's lower yield point 较低屈服点 indicates it is suitable for applications requiring flexibility.

该合金的较低屈服点表明它适用于需要灵活性的应用。

5.Engineers must consider the lower yield point 较低屈服点 when designing structures to ensure safety.

工程师在设计结构时必须考虑较低屈服点以确保安全。

作文

The concept of the lower yield point is crucial in materials science and engineering, particularly when we are discussing the mechanical properties of materials. The lower yield point refers to the stress level at which a material begins to deform plastically. This means that beyond this point, the material will not return to its original shape when the applied stress is removed. Understanding the lower yield point is essential for engineers and designers as it helps them select appropriate materials for specific applications. For instance, in construction, using materials with a low lower yield point could lead to structural failure under heavy loads.In metals, the lower yield point can often be identified through a stress-strain curve, which plots the relationship between the amount of stress applied to a material and the resulting strain or deformation. Initially, as stress is applied, the material will deform elastically, meaning it will return to its original shape once the stress is removed. However, once the lower yield point is reached, the material enters the plastic deformation stage, where permanent changes occur in the structure of the material.Different materials exhibit different lower yield points. For example, ductile materials like steel have a well-defined yield point, while brittle materials like glass may not exhibit a clear lower yield point because they tend to fracture rather than deform. This difference is significant when selecting materials for various engineering applications. Engineers must consider the lower yield point alongside other properties such as tensile strength, hardness, and toughness to ensure that the material will perform adequately under expected service conditions.Moreover, the lower yield point can also be influenced by factors such as temperature, strain rate, and the presence of impurities. For instance, increasing the temperature of a metal typically decreases its lower yield point, making it more malleable and easier to work with. Conversely, certain treatments or alloying elements can increase the lower yield point of a material, enhancing its strength and durability.In practical applications, understanding the lower yield point is vital for ensuring safety and reliability. For example, in the aerospace industry, components must withstand high stresses without failing. Engineers utilize the concept of the lower yield point to design parts that can endure the extreme conditions of flight without undergoing permanent deformation. Similarly, in automotive engineering, the lower yield point helps in selecting materials that can absorb impact without compromising the integrity of the vehicle structure.In conclusion, the lower yield point is a fundamental concept that plays a critical role in the selection and application of materials in engineering. By understanding how a material behaves at its lower yield point, engineers can make informed decisions that enhance the safety, performance, and longevity of structures and products. As technology advances, the ability to manipulate and understand the lower yield point will continue to be an essential aspect of materials science, leading to innovations in various fields such as construction, aerospace, and automotive industries.

“下屈服点”的概念在材料科学和工程中至关重要，特别是在讨论材料的机械性能时。“下屈服点”是指材料开始发生塑性变形的应力水平。这意味着超过这个点，材料在施加的应力去除后将无法恢复到其原始形状。理解“下屈服点”对工程师和设计师至关重要，因为它帮助他们选择适合特定应用的材料。例如，在建筑中，使用具有较低“下屈服点”的材料可能会导致在重负荷下结构失效。在金属中，“下屈服点”通常可以通过应力-应变曲线来识别，该曲线绘制了施加在材料上的应力与由此产生的应变或变形之间的关系。最初，当施加应力时，材料将弹性变形，这意味着一旦去除应力，它将恢复到其原始形状。然而，一旦达到“下屈服点”，材料就进入了塑性变形阶段，此时材料的结构发生了永久性变化。不同材料表现出不同的“下屈服点”。例如，像钢这样的延展性材料具有明确的屈服点，而像玻璃这样的脆性材料可能没有明显的“下屈服点”，因为它们往往会破裂而不是变形。这种差异在选择各种工程应用的材料时非常重要。工程师必须考虑“下屈服点”以及其他性质，如抗拉强度、硬度和韧性，以确保材料在预期服务条件下能够充分发挥作用。此外，“下屈服点”还可能受到温度、应变速率和杂质存在等因素的影响。例如，提高金属的温度通常会降低其“下屈服点”，使其更加可锻造且易于加工。相反，某些处理或合金元素可以提高材料的“下屈服点”，增强其强度和耐久性。在实际应用中，理解“下屈服点”对于确保安全性和可靠性至关重要。例如，在航空航天工业中，组件必须承受高应力而不发生故障。工程师利用“下屈服点”的概念来设计能够承受飞行极端条件而不发生永久变形的部件。同样，在汽车工程中，“下屈服点”有助于选择能够吸收冲击而不影响车辆结构完整性的材料。总之，“下屈服点”是一个基本概念，在工程材料的选择和应用中起着关键作用。通过了解材料在其“下屈服点”下的行为，工程师可以做出明智的决定，从而增强结构和产品的安全性、性能和耐用性。随着技术的进步，操控和理解“下屈服点”的能力将继续成为材料科学的重要方面，推动建筑、航空航天和汽车工业等各个领域的创新。