linear expansion

简明释义

线性膨胀

英英释义

例句

1.When metal rods are heated, they undergo linear expansion 线性膨胀, increasing in length.

当金属杆加热时，它们会经历线性膨胀线性膨胀，长度增加。

2.Engineers must consider linear expansion 线性膨胀 when designing bridges to prevent structural damage.

工程师在设计桥梁时必须考虑线性膨胀线性膨胀以防止结构损坏。

3.A thermometer works on the principle of linear expansion 线性膨胀 of liquids.

温度计的工作原理是液体的线性膨胀线性膨胀。

4.The linear expansion 线性膨胀 of materials can affect the accuracy of precision instruments.

材料的线性膨胀线性膨胀可能影响精密仪器的准确性。

5.In construction, linear expansion 线性膨胀 joints are used to accommodate changes in material size due to temperature.

在建筑中，使用线性膨胀线性膨胀缝来适应材料因温度变化而导致的尺寸变化。

作文

The concept of linear expansion is fundamental in the study of physics and engineering. It refers to the increase in length of a material as it is subjected to changes in temperature. When a substance is heated, its particles gain kinetic energy and move apart, leading to an increase in the distance between them. This phenomenon can be observed in everyday life, such as when metal rails expand on a hot day or when a wooden door swells in humidity. Understanding linear expansion is crucial for engineers and architects as they design structures that can withstand temperature variations without suffering damage.In practical applications, the formula for linear expansion is often used: ΔL = αL₀ΔT, where ΔL is the change in length, α is the coefficient of linear expansion, L₀ is the original length, and ΔT is the change in temperature. This equation allows us to calculate how much a material will expand or contract under specific conditions. For example, if a steel rod measuring 2 meters in length is heated from 20°C to 100°C, and the coefficient of linear expansion for steel is approximately 11 x 10^-6 /°C, we can determine the increase in length.As we delve deeper into the implications of linear expansion, we find that it plays a significant role in various fields, including construction, manufacturing, and even everyday household items. For instance, bridges are designed with expansion joints to accommodate the linear expansion of materials during temperature fluctuations. Without these joints, the stress caused by expansion could lead to structural failure.Moreover, linear expansion is not limited to solids. Liquids and gases also experience expansion, although the mechanisms differ. For instance, when water is heated, it expands, which is why it’s essential to leave space in containers when boiling liquids to prevent overflow. In gases, the expansion can be more pronounced, as the molecules have more freedom to move apart compared to solids and liquids.In conclusion, the understanding of linear expansion is vital across various disciplines. It not only helps in the design and construction of safe structures but also enhances our comprehension of natural phenomena. As temperatures fluctuate in our environment, the knowledge of how materials react to heat through linear expansion becomes increasingly important. Engineers and scientists must continue to study and apply this principle to ensure safety and efficiency in their respective fields. By grasping the concept of linear expansion, we can better appreciate the intricate balance between temperature and material properties, ultimately leading to advancements in technology and infrastructure.

线性膨胀的概念在物理和工程学的研究中是基础的。它指的是当材料受到温度变化时，其长度的增加。当物质被加热时，其粒子获得动能并相互远离，导致它们之间的距离增加。这一现象可以在日常生活中观察到，例如，当金属轨道在炎热的日子里膨胀，或者当木门因湿度而肿胀时。理解线性膨胀对工程师和建筑师至关重要，因为他们设计的结构必须能够承受温度变化而不遭受损坏。在实际应用中，线性膨胀的公式通常被使用：ΔL = αL₀ΔT，其中ΔL是长度的变化，α是线性膨胀系数，L₀是原始长度，ΔT是温度的变化。这个方程使我们能够计算在特定条件下材料将如何膨胀或收缩。例如，如果一根钢杆的长度为2米，从20°C加热到100°C，而钢的线性膨胀系数约为11 x 10^-6 /°C，我们可以确定长度的增加。深入探讨线性膨胀的影响，我们发现它在许多领域中发挥着重要作用，包括建筑、制造业，甚至日常家居用品。例如，桥梁的设计中包含了膨胀缝，以适应材料在温度波动中的线性膨胀。如果没有这些缝隙，由于膨胀造成的压力可能会导致结构失败。此外，线性膨胀并不仅限于固体。液体和气体也会经历膨胀，尽管机制有所不同。例如，当水被加热时，它会膨胀，这就是为什么在煮沸液体时需要在容器中留出空间以防止溢出的原因。在气体中，膨胀可能更为明显，因为与固体和液体相比，分子有更多的自由移动。总之，理解线性膨胀在各个学科中都是至关重要的。它不仅有助于安全结构的设计和建造，还增强了我们对自然现象的理解。随着我们环境中温度的波动，了解材料在热量作用下如何反应，通过线性膨胀变得越来越重要。工程师和科学家必须继续研究和应用这一原则，以确保其各自领域的安全和效率。通过掌握线性膨胀的概念，我们可以更好地理解温度与材料特性之间的微妙平衡，最终推动技术和基础设施的发展。