linear expansion

简明释义

线性膨胀

英英释义

例句

1.The linear expansion 线性膨胀 of materials can lead to misalignment in machinery during temperature fluctuations.

材料的线性膨胀可能导致机械在温度波动期间对齐不当。

2.Engineers must account for linear expansion 线性膨胀 in the design of bridges to prevent structural damage.

工程师在设计桥梁时必须考虑线性膨胀以防止结构损坏。

3.In construction, understanding linear expansion 线性膨胀 helps in selecting appropriate materials that can withstand temperature changes.

在建筑中，理解线性膨胀有助于选择能够承受温度变化的合适材料。

4.The metal rod will undergo linear expansion 线性膨胀 when heated, increasing its length.

当金属棒加热时，它将经历线性膨胀，长度会增加。

5.Thermometers rely on the principle of linear expansion 线性膨胀 of liquids to measure temperature accurately.

温度计依赖于液体的线性膨胀原理来准确测量温度。

作文

Understanding the concept of linear expansion is crucial in the field of physics and engineering. Linear expansion refers to the way materials expand in one dimension when they are heated. This phenomenon occurs because, as the temperature of a substance increases, the kinetic energy of its particles also rises, causing them to move apart from each other. The formula that describes linear expansion is given by 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.In practical applications, understanding linear expansion is essential for engineers and architects when designing structures. For example, bridges and railways must accommodate the expansion and contraction of materials due to temperature changes. If these factors are not considered, it can lead to structural failures or safety hazards. A classic example of linear expansion can be observed in metal rods. When a metal rod is heated, it becomes longer. This is why gaps are often left between sections of railway tracks; if the tracks were laid without any space, the heat from the sun could cause the tracks to expand and potentially buckle under pressure.Moreover, linear expansion is not limited to metals. Other materials, such as plastics and wood, also exhibit this property, although their coefficients of linear expansion may differ significantly. For instance, wood expands more in the direction of its grain than across it, which is an important consideration in woodworking and construction.The implications of linear expansion extend beyond just construction; they are also vital in manufacturing processes. As materials expand when heated, manufacturers must account for these changes to ensure precision in their products. Failure to do so can result in misalignments and defects, leading to increased costs and wasted resources.In summary, linear expansion is a fundamental principle that affects many aspects of our daily lives, from the infrastructure we rely on to the products we use. By understanding how materials respond to temperature changes, we can better design and construct systems that are safe, efficient, and durable. The importance of considering linear expansion cannot be overstated, as it plays a critical role in ensuring the functionality and longevity of various materials and structures. As we continue to innovate and develop new technologies, a solid grasp of linear expansion will remain essential for future advancements in science and engineering.

理解线性膨胀的概念在物理和工程领域至关重要。线性膨胀是指材料在加热时沿一个维度扩展的方式。这一现象发生的原因是，随着物质温度的升高，其粒子的动能也随之增加，导致它们彼此间的距离增大。描述线性膨胀的公式为ΔL = αL₀ΔT，其中ΔL是长度变化，α是线性膨胀系数，L₀是原始长度，ΔT是温度变化。在实际应用中，了解线性膨胀对于工程师和建筑师在设计结构时非常重要。例如，桥梁和铁路必须适应材料因温度变化而导致的膨胀和收缩。如果不考虑这些因素，可能会导致结构故障或安全隐患。一个经典的线性膨胀例子可以在金属杆中观察到。当金属杆被加热时，它会变得更长。这就是为什么铁路轨道之间通常留有间隙；如果没有空间铺设轨道，阳光的热量可能会导致轨道膨胀并在压力下弯曲。此外，线性膨胀并不仅限于金属。其他材料，如塑料和木材，也表现出这种特性，尽管它们的线性膨胀系数可能有显著差异。例如，木材在其纹理方向上的膨胀比横向膨胀要多，这在木工和建筑中是一个重要的考虑因素。线性膨胀的影响不仅限于建筑；它在制造过程中也至关重要。由于材料在加热时会膨胀，制造商必须考虑这些变化，以确保产品的精确性。如果不这样做，可能会导致错位和缺陷，从而增加成本和浪费资源。总之，线性膨胀是一个基本原理，影响着我们日常生活的许多方面，从我们依赖的基础设施到我们使用的产品。通过了解材料如何响应温度变化，我们可以更好地设计和构建安全、高效和耐用的系统。考虑线性膨胀的重要性不容低估，因为它在确保各种材料和结构的功能性和耐久性方面发挥着关键作用。随着我们继续创新和开发新技术，对线性膨胀的扎实理解将始终是科学和工程未来进步的基础。