yield stress

简明释义

屈服应力

英英释义

例句

1.The material failed to withstand the load because it exceeded the yield stress 屈服应力.

材料无法承受负载，因为它超过了yield stress 屈服应力。

2.In tensile tests, the point at which a material reaches its yield stress 屈服应力 is critical for analysis.

在拉伸测试中，材料达到其yield stress 屈服应力的点对于分析至关重要。

3.When designing bridges, engineers calculate the yield stress 屈服应力 to prevent structural failure.

在设计桥梁时，工程师计算yield stress 屈服应力以防止结构失效。

4.The yield stress 屈服应力 of steel is significantly higher than that of aluminum.

钢的yield stress 屈服应力明显高于铝。

5.Engineers must ensure that the design does not exceed the yield stress 屈服应力 of the materials used.

工程师必须确保设计不超过所用材料的yield stress 屈服应力。

作文

Understanding the concept of yield stress is crucial in the field of materials science and engineering. Yield stress refers to the stress at which a material begins to deform plastically. This means that the material will not return to its original shape after the stress is removed. For engineers and designers, knowing the yield stress of materials is essential for ensuring the safety and reliability of structures and components. When a material is subjected to stress, it initially deforms elastically, meaning it can return to its original shape once the load is removed. However, as the stress increases and reaches the yield stress, the material transitions from elastic deformation to plastic deformation. This transition point is critical because it marks the limit of the material's ability to withstand stress without permanent deformation.Different materials have different yield stresses. For example, metals tend to have higher yield stresses compared to polymers, which means they can endure greater loads before deforming permanently. Understanding these differences is vital when selecting materials for specific applications. Engineers must consider factors such as the operating environment, load conditions, and potential failure modes when choosing materials based on their yield stress.In practical applications, the yield stress is often determined through standardized testing methods. One common test is the tensile test, where a sample material is pulled until it breaks. The stress and strain are recorded throughout the test, allowing engineers to identify the yield stress accurately. This data is then used in design calculations to ensure that structures can withstand expected loads without exceeding the yield stress of the materials used.Moreover, the concept of yield stress is also important in understanding how materials behave under different temperatures and conditions. For instance, some materials may experience a decrease in yield stress at elevated temperatures, making them more susceptible to deformation. Conversely, materials may exhibit increased yield stress at lower temperatures, which can be advantageous in certain applications.In conclusion, the yield stress of a material is a fundamental property that plays a significant role in engineering design and material selection. By understanding the yield stress, engineers can make informed decisions that enhance the performance and safety of structures and components. As technology advances and new materials are developed, the importance of accurately determining and applying yield stress will continue to grow, ensuring that innovations are both effective and reliable.

理解屈服应力的概念在材料科学和工程领域至关重要。屈服应力是指材料开始发生塑性变形时的应力。这意味着材料在去除应力后不会恢复到其原始形状。对于工程师和设计师来说，了解材料的屈服应力对于确保结构和组件的安全性和可靠性至关重要。当材料受到应力作用时，它最初会发生弹性变形，这意味着一旦去除负载，它可以恢复到其原始形状。然而，随着应力的增加并达到屈服应力，材料将从弹性变形转变为塑性变形。这个转变点至关重要，因为它标志着材料在不发生永久变形的情况下承受应力的能力的极限。不同材料具有不同的屈服应力。例如，金属的屈服应力通常高于聚合物，这意味着它们可以承受更大的负载而不发生永久变形。在选择特定应用的材料时，了解这些差异至关重要。工程师在根据材料的屈服应力选择材料时，必须考虑操作环境、负载条件和潜在失效模式等因素。在实际应用中，屈服应力通常通过标准化测试方法来确定。一种常见的测试是拉伸测试，在该测试中，样品材料被拉伸直到断裂。在整个测试过程中记录应力和应变，从而使工程师能够准确识别屈服应力。然后，这些数据用于设计计算，以确保结构能够承受预期的负载，而不超过所用材料的屈服应力。此外，屈服应力的概念在理解材料在不同温度和条件下的行为时也很重要。例如，一些材料在高温下可能会经历屈服应力的降低，使其更容易发生变形。相反，材料在低温下可能表现出增加的屈服应力，这在某些应用中可能是有利的。总之，材料的屈服应力是一个基本属性，在工程设计和材料选择中发挥着重要作用。通过理解屈服应力，工程师可以做出明智的决策，从而增强结构和组件的性能和安全性。随着技术的发展和新材料的开发，准确确定和应用屈服应力的重要性将继续增长，确保创新既有效又可靠。