creep rate

简明释义

蠕变率

英英释义

例句

1.A higher creep rate can lead to premature failure of mechanical components.

较高的蠕变速率可能导致机械部件的过早失效。

2.The creep rate of polymers can vary greatly depending on their molecular structure.

聚合物的蠕变速率可能会因其分子结构而有很大差异。

3.The creep rate of the material under high temperature can significantly affect its performance.

在高温下，材料的蠕变速率会显著影响其性能。

4.Engineers must consider the creep rate when designing components that will be subjected to constant stress.

工程师在设计将承受恒定应力的组件时，必须考虑蠕变速率。

5.To ensure safety, the creep rate of the bridge materials was tested rigorously.

为了确保安全，桥梁材料的蠕变速率进行了严格测试。

作文

Understanding the concept of creep rate is essential for engineers and material scientists alike. The term refers to the slow, time-dependent deformation of materials under constant stress, which can lead to significant changes in dimensions over time. This phenomenon is particularly important in high-temperature applications where materials are subjected to prolonged loads. For instance, metals and polymers exhibit different creep rates, influenced by their molecular structure and temperature conditions. In engineering design, recognizing the creep rate of a material helps predict its long-term performance and reliability. For example, a steel beam used in a bridge may experience a certain creep rate under heavy loads, which could eventually affect the bridge's structural integrity. If engineers do not take this into account, the result could be catastrophic, leading to failures that endanger lives and property. Therefore, it is critical to conduct creep tests to determine the creep rate of materials before they are used in construction. Furthermore, the creep rate can vary significantly between different materials and environmental conditions. For instance, polymers typically have higher creep rates compared to metals, making them less suitable for applications requiring high dimensional stability. Additionally, factors such as temperature, humidity, and the duration of applied stress can all impact the creep rate. In high-temperature environments, materials may exhibit accelerated creep rates, necessitating the use of heat-resistant alloys or composites. To illustrate the importance of creep rate, consider the case of gas turbine engines, which operate at extremely high temperatures. The materials used in these engines must withstand not only the mechanical stresses but also the thermal stresses that lead to creep deformation. Engineers must select materials with low creep rates to ensure that the components maintain their shape and performance over time. In conclusion, the creep rate is a crucial factor in material selection and engineering design. It affects how materials behave under stress over extended periods and can have significant implications for safety and functionality. By understanding and measuring the creep rate, engineers can make informed decisions that enhance the durability and reliability of their designs, ultimately contributing to safer and more efficient structures and systems.

理解蠕变速率的概念对工程师和材料科学家而言至关重要。这个术语指的是材料在恒定应力下的缓慢、时间依赖性变形，这可能导致随时间显著的尺寸变化。这种现象在高温应用中尤为重要，因为材料在长时间承受负载时会受到影响。例如，金属和聚合物表现出不同的蠕变速率，这受其分子结构和温度条件的影响。在工程设计中，识别材料的蠕变速率有助于预测其长期性能和可靠性。例如，用于桥梁的钢梁在重负载下可能经历一定的蠕变速率，这最终可能影响桥梁的结构完整性。如果工程师不考虑这一点，结果可能会是灾难性的，导致危及生命和财产的故障。因此，在使用材料进行建筑之前，进行蠕变测试以确定其蠕变速率是至关重要的。此外，蠕变速率在不同材料和环境条件之间可能会显著变化。例如，聚合物的蠕变速率通常高于金属，使其不太适合需要高尺寸稳定性的应用。此外，温度、湿度和施加应力的持续时间等因素都会影响蠕变速率。在高温环境中，材料可能表现出加速的蠕变速率，因此需要使用耐热合金或复合材料。为了说明蠕变速率的重要性，可以考虑燃气涡轮发动机的案例，这些发动机在极高的温度下运行。用于这些发动机的材料必须承受机械应力和导致蠕变变形的热应力。工程师必须选择具有低蠕变速率的材料，以确保组件在长时间内保持其形状和性能。总之，蠕变速率是材料选择和工程设计中的关键因素。它影响材料在长时间承受应力时的行为，并可能对安全性和功能性产生重大影响。通过理解和测量蠕变速率，工程师可以做出明智的决策，从而增强设计的耐久性和可靠性，最终促进更安全、更高效的结构和系统。