linear expansion

简明释义

线膨胀

英英释义

例句

1.The concept of linear expansion is crucial in engineering when designing structures that will be subjected to temperature changes.

在工程设计中，当设计会受到温度变化影响的结构时，线性膨胀的概念至关重要。

2.Metals typically exhibit linear expansion when heated, which can affect the fit of components in machinery.

金属在加热时通常表现出线性膨胀，这可能会影响机器中组件的适配。

3.In construction, understanding linear expansion helps prevent cracking in concrete due to temperature fluctuations.

在建筑中，理解线性膨胀有助于防止由于温度波动而导致混凝土开裂。

4.Thermometers rely on the linear expansion of liquids to measure temperature accurately.

温度计依赖于液体的线性膨胀来准确测量温度。

5.When designing railroads, engineers must account for linear expansion to avoid track misalignment.

在设计铁路时，工程师必须考虑线性膨胀以避免轨道错位。

作文

The concept of linear expansion is a fundamental principle in physics that describes how materials change in length when subjected to changes in temperature. When a solid material is heated, its particles begin to vibrate more vigorously, causing the material to expand. This phenomenon is particularly important in engineering and construction, where precise measurements are crucial for the integrity of structures. For instance, bridges and railways must account for linear expansion to avoid structural failures. Without proper calculations, the expansion of materials due to heat can lead to significant issues such as buckling or cracking. To understand linear expansion, we can refer to the formula: ΔL = αL₀ΔT, where ΔL represents 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 illustrates how different materials react differently to temperature changes. For example, metals typically have higher coefficients of linear expansion compared to ceramics or glass. This means that as temperatures rise, metals will expand more than these other materials, which can lead to complications in mixed-material constructions.Moreover, linear expansion is not only limited to solids. It can also be observed in liquids and gases, although the principles governing their expansion may differ slightly. In everyday life, we witness linear expansion when we see gaps between wooden floorboards in summer; the wood expands due to increased temperatures and humidity. Conversely, in winter, the boards contract, creating larger gaps. This is a practical example of how linear expansion affects our daily lives and the materials we use.In conclusion, understanding linear expansion is essential for anyone involved in fields related to materials science, engineering, or construction. The ability to predict how much a material will expand or contract with temperature changes can prevent costly mistakes and ensure the safety and longevity of structures. As we continue to innovate and develop new materials, the principles of linear expansion will remain a critical consideration in design and application. Ignoring this concept could lead to disastrous consequences, emphasizing the need for thorough knowledge and careful planning in any project involving thermal dynamics.

“线性膨胀”是物理学中的一个基本概念，描述了材料在温度变化时如何改变长度。当固体材料被加热时，其粒子开始更加剧烈地振动，从而导致材料膨胀。这种现象在工程和建筑中尤为重要，因为精确的测量对于结构的完整性至关重要。例如，桥梁和铁路必须考虑到“线性膨胀”，以避免结构故障。如果没有适当的计算，由于热量导致的材料膨胀可能会导致严重的问题，如翘曲或开裂。要理解“线性膨胀”，我们可以参考公式：ΔL = αL₀ΔT，其中ΔL代表长度变化，α是线性膨胀系数，L₀是原始长度，ΔT是温度变化。这个方程说明了不同材料对温度变化的反应是不同的。例如，与陶瓷或玻璃相比，金属通常具有更高的“线性膨胀”系数。这意味着随着温度的升高，金属的膨胀程度将大于这些其他材料，这可能在混合材料的构造中导致复杂的问题。此外，“线性膨胀”不仅限于固体。它也可以在液体和气体中观察到，尽管支配其膨胀的原则可能略有不同。在日常生活中，我们可以看到“线性膨胀”的例子，当我们看到夏天木地板之间的缝隙时；木材由于温度和湿度的升高而膨胀。相反，在冬季，地板收缩，形成更大的缝隙。这是“线性膨胀”如何影响我们的日常生活和我们使用的材料的一个实际例子。总之，理解“线性膨胀”对于任何涉及材料科学、工程或建筑领域的人来说都是至关重要的。能够预测材料在温度变化时将扩展或收缩多少，可以防止代价高昂的错误，并确保结构的安全性和耐久性。随着我们继续创新和开发新材料，“线性膨胀”的原理将始终是设计和应用中的关键考虑因素。忽视这一概念可能导致灾难性的后果，这强调了在任何涉及热力学的项目中需要深入的知识和仔细的计划。