yield stress

简明释义

屈服应力

英英释义

例句

1.When designing beams, engineers must consider the yield stress to prevent deformation.

在设计梁时，工程师必须考虑屈服应力以防止变形。

2.The yield stress of steel is higher than that of aluminum, making it suitable for heavy structures.

钢的屈服应力高于铝，使其适合重型结构。

3.In engineering, understanding the yield stress of a material is crucial for safety.

在工程中，理解材料的屈服应力对安全至关重要。

4.The material failed under stress levels exceeding its yield stress.

材料在超过其屈服应力的应力水平下失效。

5.A material's yield stress can vary with temperature and strain rate.

材料的屈服应力可能会随温度和应变速率变化。

作文

Understanding the concept of yield stress is crucial in the field of materials science and engineering. Yield stress refers to the minimum amount of stress that a material can withstand while still returning to its original shape when the applied stress is removed. When the stress exceeds this limit, the material undergoes permanent deformation. This characteristic is vital for engineers and designers who need to ensure that structures and components can handle the forces they will encounter during their service life without failing or deforming irreversibly.In practical terms, yield stress is often determined through tensile tests, where a sample of material is pulled until it deforms. The point at which the material begins to deform permanently is recorded as the yield stress. Different materials have different yield stresses, which is why understanding this property is essential for selecting the right material for a specific application. For example, metals typically have higher yield stresses compared to plastics, making them suitable for load-bearing applications.The significance of yield stress extends beyond just material selection; it also plays a critical role in safety considerations. Engineers must take into account the yield stress of materials when designing structures such as bridges, buildings, and vehicles. If a structure is subjected to stress levels that exceed the yield stress of the materials used, it could lead to catastrophic failure. Therefore, understanding and calculating the yield stress helps in ensuring that safety factors are incorporated into designs, which provides a buffer against unexpected loads.Moreover, the yield stress can be influenced by various factors including temperature, strain rate, and the presence of impurities within the material. For example, as temperature increases, some materials may experience a decrease in yield stress, which can affect their performance in high-temperature applications. Similarly, the rate at which stress is applied can also change the yield stress; materials might behave differently under rapid loading conditions compared to slow loading conditions.In summary, the concept of yield stress is fundamental to understanding how materials behave under stress. It is a critical parameter in material selection, design, and safety assessments in engineering. By grasping the importance of yield stress, engineers can make informed decisions that lead to safer and more reliable structures and products. As technology continues to advance, the study of yield stress and its implications will remain a vital area of research and application in materials science and engineering.

理解屈服应力的概念在材料科学和工程领域至关重要。屈服应力是指材料在施加的应力移除后仍能恢复其原始形状的最小应力。当施加的应力超过此极限时，材料将发生永久变形。这个特性对于需要确保结构和组件能够承受在其使用寿命中遇到的力量而不发生失效或不可逆变形的工程师和设计师来说至关重要。在实际应用中，屈服应力通常通过拉伸试验来确定，在试验中，材料样本被拉伸直到变形。记录下材料开始发生永久变形的点作为屈服应力。不同材料具有不同的屈服应力，这就是理解这一属性对选择特定应用的合适材料至关重要的原因。例如，金属通常比塑料具有更高的屈服应力，使其适用于承载应用。屈服应力的重要性不仅限于材料选择；它在安全考虑中也起着关键作用。工程师在设计桥梁、建筑物和车辆等结构时，必须考虑所用材料的屈服应力。如果结构受到的应力超过所用材料的屈服应力，可能会导致灾难性的失败。因此，理解和计算屈服应力有助于确保在设计中纳入安全系数，从而为意外载荷提供缓冲。此外，屈服应力还可以受到温度、应变速率和材料中杂质存在等各种因素的影响。例如，随着温度的升高，一些材料的屈服应力可能会降低，这可能会影响它们在高温应用中的性能。同样，施加应力的速率也可能改变屈服应力；材料在快速加载条件下的表现可能与在慢速加载条件下的表现不同。总之，屈服应力的概念是理解材料在应力下行为的基础。它是材料选择、设计和工程安全评估中的关键参数。通过掌握屈服应力的重要性，工程师可以做出明智的决策，从而导致更安全、更可靠的结构和产品。随着技术的不断进步，对屈服应力及其影响的研究将继续成为材料科学和工程领域的重要研究和应用方向。