creep rupture

简明释义

蠕变断裂

英英释义

例句

1.During the testing, we observed signs of creep rupture in the plastic samples after prolonged stress.

在测试中，我们观察到塑料样本在长时间应力作用后出现了蠕变破裂的迹象。

2.The engineer warned that the material could experience creep rupture if subjected to high temperatures for extended periods.

工程师警告说，如果材料在高温下长时间使用，可能会发生蠕变破裂。

3.To prevent creep rupture, we need to select materials with better thermal stability.

为了防止蠕变破裂，我们需要选择热稳定性更好的材料。

4.In the design phase, we must consider the potential for creep rupture in our components.

在设计阶段，我们必须考虑组件发生蠕变破裂的潜在可能性。

5.The failure analysis revealed that creep rupture was the primary cause of the structural collapse.

故障分析显示，蠕变破裂是结构倒塌的主要原因。

作文

Creep rupture is a critical concept in materials science and engineering, particularly when dealing with metals and polymers at elevated temperatures. It refers to the failure of a material due to prolonged exposure to stress at high temperatures, resulting in a gradual deformation that ultimately leads to fracture. Understanding this phenomenon is essential for engineers and designers who work with materials that will be subjected to such conditions. To illustrate the importance of understanding creep rupture, consider the case of gas turbines used in power plants. These turbines operate at extremely high temperatures, often exceeding 1000 degrees Celsius. The materials used in their construction must withstand not only the intense heat but also the mechanical stresses imposed by rotating components. If the materials are not adequately designed to resist creep rupture, they may fail prematurely, leading to catastrophic consequences such as equipment damage, safety hazards, and significant financial losses.The mechanisms behind creep rupture involve several factors, including the temperature of the material, the applied stress, and the duration of that stress. At elevated temperatures, the atomic structure of materials begins to change, allowing for increased mobility of dislocations—defects within the crystal lattice of metals. This mobility can lead to a gradual elongation of the material under constant load, a process known as creep. Over time, this creep can accumulate to the point where the material reaches its ultimate tensile strength and fails, resulting in creep rupture.To mitigate the risks associated with creep rupture, engineers often employ various strategies during the design and selection of materials. One common approach is to use alloys that are specifically formulated to enhance creep resistance. For example, nickel-based superalloys are frequently used in high-temperature applications because they exhibit superior mechanical properties and stability under stress. Additionally, engineers may choose to reduce operating temperatures or lower the applied stresses to minimize the likelihood of creep rupture occurring.Another important aspect of managing creep rupture is conducting thorough testing and analysis of materials under simulated service conditions. This can include long-term stress tests at elevated temperatures to determine the material's creep rate and eventual rupture time. By understanding how a material behaves over time, engineers can make informed decisions about its suitability for specific applications.In conclusion, creep rupture is a significant concern in the field of materials science, especially for applications involving high temperatures and sustained loads. Understanding the mechanisms behind this phenomenon, as well as implementing effective design strategies and testing protocols, is crucial for ensuring the safety and reliability of engineering systems. As technology continues to advance, ongoing research into new materials and methods will further enhance our ability to predict and prevent creep rupture, ultimately leading to safer and more efficient designs in various industries.

蠕变断裂是材料科学和工程中的一个关键概念，特别是在处理高温下的金属和聚合物时。它指的是由于长时间暴露在高温下的应力而导致材料的失效，这种失效表现为逐渐的变形，最终导致断裂。理解这一现象对于从事将会遭受此类条件的材料的工程师和设计师至关重要。为了说明理解creep rupture的重要性，可以考虑发电厂中使用的燃气涡轮的案例。这些涡轮在极高的温度下运行，通常超过1000摄氏度。用于其构造的材料必须承受不仅是剧烈的热量，还有旋转部件施加的机械应力。如果材料未能充分设计以抵抗creep rupture，它们可能会过早失效，导致灾难性的后果，如设备损坏、安全隐患和显著的经济损失。creep rupture背后的机制涉及多个因素，包括材料的温度、施加的应力以及该应力的持续时间。在高温下，材料的原子结构开始发生变化，允许位错（晶体晶格内的缺陷）的移动增加。这种移动可能导致在恒定负载下材料的逐渐延伸，这个过程称为蠕变。随着时间的推移，这种蠕变可能累积到材料达到其极限拉伸强度并破裂，从而导致creep rupture。为了减轻与creep rupture相关的风险，工程师在材料的设计和选择过程中通常会采用各种策略。一种常见的方法是使用专门配制以增强蠕变抗性的合金。例如，镍基超级合金通常用于高温应用，因为它们在应力下表现出优越的机械性能和稳定性。此外，工程师可能会选择降低操作温度或降低施加的应力，以尽量减少发生creep rupture的可能性。管理creep rupture的另一个重要方面是在模拟服务条件下对材料进行彻底测试和分析。这可以包括在高温下进行长期应力测试，以确定材料的蠕变速率和最终断裂时间。通过了解材料随时间的行为，工程师可以做出关于其适用性的明智决策。总之，creep rupture在材料科学领域是一个重要的关注点，特别是在涉及高温和持续负载的应用中。理解这一现象背后的机制，以及实施有效的设计策略和测试方案，对于确保工程系统的安全性和可靠性至关重要。随着技术的不断进步，针对新材料和方法的持续研究将进一步增强我们预测和防止creep rupture的能力，最终导致各个行业更安全、更高效的设计。