coefficient of thermal expansion

简明释义

热膨胀系数

英英释义

例句

1.A material's coefficient of thermal expansion can impact its suitability for high-temperature applications.

材料的热膨胀系数会影响其在高温应用中的适用性。

2.When designing pipes, it is important to consider the coefficient of thermal expansion to avoid leaks.

在设计管道时，考虑热膨胀系数以避免泄漏是很重要的。

3.The engineer calculated the coefficient of thermal expansion to ensure the bridge would withstand temperature changes.

工程师计算了热膨胀系数以确保桥梁能够承受温度变化。

4.The coefficient of thermal expansion of metals is usually higher than that of ceramics.

金属的热膨胀系数通常高于陶瓷。

5.Different materials have different coefficients of thermal expansion, which affects their performance in construction.

不同材料具有不同的热膨胀系数，这会影响它们在建筑中的表现。

作文

The concept of coefficient of thermal expansion is fundamental in understanding how materials behave when subjected to changes in temperature. In simple terms, the coefficient of thermal expansion is a measure of how much a material expands or contracts per degree of temperature change. This property is crucial in various fields such as engineering, construction, and manufacturing, where materials are often exposed to fluctuating temperatures.For instance, when metals are heated, they tend to expand. This expansion can lead to significant implications in structural integrity if not properly accounted for. The coefficient of thermal expansion varies from one material to another; for example, aluminum has a higher coefficient of thermal expansion than steel. This means that, under the same temperature increase, aluminum will expand more than steel. Therefore, when designing structures that incorporate different materials, engineers must consider the differences in their coefficients of thermal expansion to avoid potential issues such as warping, cracking, or even catastrophic failures.In everyday life, we can observe the effects of the coefficient of thermal expansion. A common example is the gaps found in railway tracks. As the temperature rises, the metal rails expand. If there were no gaps to accommodate this expansion, the tracks could buckle, leading to dangerous situations for trains. This is why engineers leave space between rail sections, a practice informed by the knowledge of the coefficient of thermal expansion of the materials used.Moreover, the coefficient of thermal expansion is not only limited to metals. It also applies to other materials like plastics, ceramics, and even concrete. For example, concrete has a relatively low coefficient of thermal expansion, which is beneficial in construction as it minimizes the stress caused by temperature changes. However, when combining materials with different coefficients of thermal expansion, such as concrete and steel, careful consideration must be given to ensure that the composite structure can withstand thermal stresses without failing.In the aerospace industry, understanding the coefficient of thermal expansion is vital due to the extreme temperature variations experienced during flight. Components of an aircraft are made from a variety of materials, each with its own coefficient of thermal expansion. Engineers must ensure that these components work together harmoniously, especially when subjected to the high temperatures of engine operation and the cold of high altitudes.In conclusion, the coefficient of thermal expansion plays a critical role in the design and functionality of materials across various industries. Its implications are far-reaching, affecting everything from the safety of transportation systems to the durability of buildings. Understanding this property allows engineers and designers to create better, safer, and more efficient products that can withstand the test of time and temperature. As we continue to innovate and develop new materials, the importance of the coefficient of thermal expansion will undoubtedly remain a key consideration in engineering practices worldwide.

热膨胀系数的概念对于理解材料在温度变化时的行为至关重要。简单来说，热膨胀系数是衡量材料每摄氏度温度变化时扩展或收缩多少的指标。这个属性在工程、建筑和制造等多个领域中至关重要，因为材料通常会暴露在波动的温度下。例如，当金属被加热时，它们往往会膨胀。这种膨胀如果没有得到适当考虑，可能会对结构完整性产生重大影响。不同材料的热膨胀系数各不相同；例如，铝的热膨胀系数高于钢。这意味着在相同的温度升高下，铝的膨胀量会大于钢。因此，在设计包含不同材料的结构时，工程师必须考虑它们的热膨胀系数差异，以避免潜在的问题，如变形、开裂甚至灾难性故障。在日常生活中，我们可以观察到热膨胀系数的影响。一个常见的例子是铁路轨道之间的缝隙。随着温度的升高，金属轨道会膨胀。如果没有缝隙来容纳这种膨胀，轨道可能会翘曲，从而导致列车出现危险情况。这就是为什么工程师在轨道段之间留出空间，这一做法是基于对材料热膨胀系数的了解。此外，热膨胀系数不仅限于金属。它也适用于其他材料，如塑料、陶瓷甚至混凝土。例如，混凝土的热膨胀系数相对较低，这在建筑中是有利的，因为它最小化了温度变化引起的应力。然而，当将具有不同热膨胀系数的材料组合在一起时，如混凝土和钢，必须仔细考虑，以确保复合结构能够承受热应力而不发生故障。在航空航天工业中，理解热膨胀系数至关重要，因为飞行过程中经历的极端温度变化。飞机的组件由多种材料制成，每种材料都有其自身的热膨胀系数。工程师必须确保这些组件和谐地工作，特别是在发动机运行的高温和高空的寒冷环境中。总之，热膨胀系数在各个行业的材料设计和功能中发挥着关键作用。它的影响深远，涉及从交通系统的安全性到建筑物的耐久性等方方面面。理解这一属性使工程师和设计师能够创造出更好、更安全和更高效的产品，这些产品能够经受住时间和温度的考验。随着我们继续创新和开发新材料，热膨胀系数的重要性无疑将继续成为全球工程实践中的关键考虑因素。