creep curve

简明释义

蠕变曲线

英英释义

例句

1.The creep curve helps predict when maintenance will be required for aging infrastructure.

这条蠕变曲线有助于预测老化基础设施何时需要维护。

2.In construction, engineers refer to the creep curve to ensure the stability of structures over decades.

在建筑中，工程师参考蠕变曲线以确保结构在数十年内的稳定性。

3.The creep curve indicates how much deformation a material will experience over time.

这条蠕变曲线显示了材料在一段时间内会经历多少变形。

4.The engineer analyzed the material's performance using the creep curve to predict its long-term behavior under stress.

工程师使用蠕变曲线分析材料的性能，以预测其在应力下的长期表现。

5.Understanding the creep curve is essential for designing components that will endure high temperatures.

理解蠕变曲线对于设计能够承受高温的部件至关重要。

作文

The concept of the creep curve is fundamental in understanding how materials behave under sustained stress over time. In engineering and material science, the creep curve represents a graphical depiction of the relationship between time and deformation of a material when subjected to constant load at elevated temperatures. This phenomenon is particularly relevant for materials used in high-temperature applications, such as metals in turbine engines or polymers in automotive components.When a material is first subjected to a load, it experiences an initial elastic deformation. This is the immediate response of the material, which is reversible once the load is removed. However, with continued application of the load, the material begins to undergo creep, a gradual and time-dependent deformation that occurs even when the stress remains constant.The creep curve typically consists of three distinct stages: the primary creep, secondary creep, and tertiary creep. During the primary stage, the rate of deformation decreases over time as the material adjusts to the load. This stage is characterized by a relatively high initial creep rate that slows down as the material undergoes some internal changes, such as dislocation movements and the rearrangement of microstructures.In the secondary creep stage, the rate of deformation becomes relatively constant, which is often referred to as steady-state creep. This phase can last for an extended period and is crucial for engineers to consider when designing components that will be subjected to long-term loads. The material's properties during this stage are essential for predicting its lifespan and performance under operational conditions.Finally, the tertiary creep stage signifies the onset of accelerated deformation leading to failure. This stage is marked by a rapid increase in the creep rate, which ultimately results in fracture or rupture. Understanding the creep curve is vital for predicting when a material might fail under prolonged stress, allowing engineers to design safer and more reliable structures.The implications of the creep curve extend beyond just material selection; they influence design choices, maintenance schedules, and safety assessments in various industries. For instance, in aerospace engineering, knowing the creep characteristics of turbine blades can help engineers ensure that these components can withstand the extreme conditions they face without failing prematurely. Similarly, in civil engineering, understanding the creep behavior of concrete can lead to better predictions of how bridges and buildings will settle over time.In conclusion, the creep curve is a critical tool for engineers and scientists working with materials under constant stress. By analyzing the stages of creep, professionals can make informed decisions about material selection, design parameters, and maintenance practices. As technology advances and materials continue to evolve, the study of the creep curve will remain essential in ensuring the longevity and safety of engineered systems.

“蠕变曲线”的概念在理解材料在持续应力下随时间变化的行为中是基础。在工程和材料科学中，creep curve代表了材料在高温下施加恒定负载时，时间与变形之间关系的图形表示。这种现象对于用于高温应用的材料尤为相关，例如涡轮发动机中的金属或汽车部件中的聚合物。当材料首次承受负载时，它会经历初始的弹性变形。这是材料的即时反应，一旦负载移除，这种变形是可逆的。然而，随着负载的持续施加，材料开始发生蠕变，即使在应力保持不变的情况下，也会出现逐渐的、依赖于时间的变形。蠕变曲线通常由三个不同的阶段组成：初级蠕变、次级蠕变和三级蠕变。在初级阶段，变形速率随时间减小，因为材料对负载进行调整。这个阶段的特征是相对较高的初始蠕变速率，随着材料经历一些内部变化，如位错运动和微观结构的重新排列而减缓。在次级蠕变阶段，变形速率相对恒定，通常被称为稳态蠕变。这个阶段可以持续很长时间，对于工程师在设计将承受长期负载的组件时至关重要。此阶段材料的特性对预测其在操作条件下的使用寿命和性能至关重要。最后，三级蠕变阶段标志着加速变形导致失效的开始。这个阶段的特征是蠕变速率的快速增加，最终导致断裂或破裂。理解蠕变曲线对于预测材料在长期应力下可能失败的时间至关重要，从而使工程师能够设计出更安全、更可靠的结构。蠕变曲线的影响不仅仅局限于材料选择；它们还影响设计选择、维护计划和各行业的安全评估。例如，在航空航天工程中，了解涡轮叶片的蠕变特性可以帮助工程师确保这些组件能够承受极端条件而不会过早失效。同样，在土木工程中，理解混凝土的蠕变行为可以更好地预测桥梁和建筑物随时间的沉降情况。总之，creep curve是工程师和科学家在处理承受恒定应力的材料时的重要工具。通过分析蠕变的各个阶段，专业人员可以就材料选择、设计参数和维护实践做出明智的决策。随着技术的发展和材料的不断演变，研究蠕变曲线将继续在确保工程系统的耐久性和安全性方面发挥重要作用。