expansion coefficient

简明释义

膨胀系数

英英释义

例句

1.In thermodynamics, the expansion coefficient 膨胀系数 is used to describe how gases expand with temperature.

在热力学中，膨胀系数用于描述气体随温度的变化而膨胀的情况。

2.When selecting materials for a thermal insulator, the expansion coefficient 膨胀系数 must be low to minimize expansion and contraction.

在选择热绝缘材料时，膨胀系数必须较低，以最小化膨胀和收缩。

3.The expansion coefficient of concrete varies with its composition, affecting its durability in extreme weather conditions.

混凝土的膨胀系数因其成分而异，影响其在极端天气条件下的耐久性。

4.The expansion coefficient of steel is crucial for engineers to consider when designing structures that will experience temperature changes.

钢的膨胀系数对于工程师在设计会经历温度变化的结构时至关重要。

5.Understanding the expansion coefficient of different metals is essential for applications in aerospace engineering.

了解不同金属的膨胀系数对于航空航天工程中的应用至关重要。

作文

The concept of the expansion coefficient is crucial in various fields of science and engineering. It refers to the measure of how much a material expands when it is heated. Understanding this property is essential for designing structures and materials that can withstand temperature changes without failing. For instance, when constructing bridges or railways, engineers must account for the expansion coefficient of the materials used. If they do not, the structures may warp or crack due to thermal expansion during hot weather. In physics, the expansion coefficient is often expressed as a ratio of the change in size to the original size per degree of temperature change. This means that different materials have different rates of expansion, which can lead to complications when combining materials with varying expansion coefficients. For example, if a metal with a high expansion coefficient is joined with a ceramic that has a low one, the two materials may expand and contract at different rates, leading to stress and potential failure at the joint. Moreover, the expansion coefficient is not only relevant in construction but also plays a significant role in everyday life. Consider the scenario of heating a metal lid on a glass jar. The metal lid expands more than the glass due to its higher expansion coefficient, making it easier to open. This simple observation demonstrates how the principles of thermal expansion affect our daily activities. Furthermore, the expansion coefficient varies depending on the state of matter. Solids typically have lower expansion coefficients compared to liquids and gases. For instance, water has a unique property where its expansion coefficient changes near its freezing point, causing ice to float. This phenomenon is vital for aquatic life, as it insulates the water below and maintains a stable environment for organisms. In conclusion, the expansion coefficient is a fundamental property that influences a wide array of applications in science and engineering. From the design of infrastructure to everyday tasks, understanding how materials respond to temperature changes is essential for ensuring safety and functionality. As we continue to explore new materials and technologies, the importance of accurately measuring and applying the expansion coefficient will only grow. Therefore, it is imperative for students and professionals in related fields to grasp this concept thoroughly and consider its implications in their work. By doing so, we can create more resilient structures and improve our interactions with the world around us.

“膨胀系数”这一概念在科学和工程的各个领域都至关重要。它指的是材料在加热时膨胀的程度。理解这一属性对设计能够承受温度变化而不失效的结构和材料至关重要。例如，在建造桥梁或铁路时，工程师必须考虑所用材料的膨胀系数。如果他们不这样做，结构可能会因高温天气下的热膨胀而变形或开裂。在物理学中，膨胀系数通常表示为温度变化每度的原始尺寸与尺寸变化的比率。这意味着不同材料的膨胀速率不同，这可能导致在组合具有不同膨胀系数的材料时出现复杂情况。例如，如果将一个具有高膨胀系数的金属与一个具有低膨胀系数的陶瓷连接在一起，这两种材料可能会以不同的速率膨胀和收缩，从而导致接头处产生应力并可能失效。此外，膨胀系数不仅与建筑相关，还在日常生活中发挥着重要作用。考虑加热玻璃罐金属盖的场景。由于金属盖的膨胀系数较高，它比玻璃膨胀得更多，从而使打开罐子更容易。这一简单的观察展示了热膨胀原理如何影响我们的日常活动。此外，膨胀系数还因物质的状态而异。固体的膨胀系数通常低于液体和气体。例如，水具有独特的性质，其膨胀系数在接近冰点时发生变化，导致冰浮在水面上。这一现象对于水生生物至关重要，因为它为下面的水提供了绝缘，保持了生物体的稳定环境。总之，膨胀系数是影响科学和工程中广泛应用的基本属性。从基础设施的设计到日常任务，理解材料如何响应温度变化对于确保安全性和功能性至关重要。随着我们继续探索新材料和技术，准确测量和应用膨胀系数的重要性只会增加。因此，相关领域的学生和专业人员必须彻底掌握这一概念，并考虑其在工作中的影响。通过这样做，我们可以创造出更具韧性的结构，并改善我们与周围世界的互动。