linear expansivity

简明释义

线膨胀性

英英释义

例句

1.Thermal expansion occurs due to linear expansivity 线性膨胀系数, causing materials to expand with heat.

由于线性膨胀系数，热膨胀会导致材料在加热时膨胀。

2.The engineer calculated the linear expansivity 线性膨胀系数 of the material to ensure it would withstand temperature changes.

工程师计算了材料的线性膨胀系数，以确保它能承受温度变化。

3.The linear expansivity 线性膨胀系数 of concrete must be considered when designing large structures.

在设计大型结构时，必须考虑混凝土的线性膨胀系数。

4.Understanding the linear expansivity 线性膨胀系数 of metals is crucial for constructing bridges.

理解金属的线性膨胀系数对于建造桥梁至关重要。

5.Different materials have different linear expansivity 线性膨胀系数, which affects their applications in engineering.

不同材料具有不同的线性膨胀系数，这影响了它们在工程中的应用。

作文

Understanding the concept of linear expansivity is crucial in various fields of science and engineering. It refers to the tendency of a material to change its dimensions, particularly its length, in response to changes in temperature. As temperatures rise, materials generally expand; conversely, they contract when temperatures fall. This phenomenon is not only observable in everyday life but also plays a significant role in the design and construction of buildings, bridges, and other structures. For instance, if a bridge does not account for the linear expansivity of the materials used, it may suffer from structural damage over time due to temperature fluctuations.In physics, linear expansivity is quantitatively defined as the change in length per unit length per degree change in temperature. The formula often used is: Λ = ΔL / (L0 * ΔT), where ΔL is the change in length, L0 is the original length, and ΔT is the change in temperature. Understanding this relationship allows engineers to select appropriate materials for specific environments, ensuring that structures can withstand thermal stresses without failing.Moreover, different materials exhibit different coefficients of linear expansivity. For example, metals typically have higher coefficients compared to ceramics or glass. This means that metal components in a structure will expand and contract more than non-metal components when subjected to the same temperature changes. This discrepancy can lead to complications if not properly managed, such as warping or cracking in joints where different materials meet.In practical applications, engineers often include expansion joints in their designs. These joints are specifically designed to accommodate the expected movement due to linear expansivity. They allow for the natural expansion and contraction of materials while maintaining the integrity of the overall structure. Without these joints, buildings might develop cracks, and bridges could become unstable, leading to significant safety hazards.Furthermore, the understanding of linear expansivity extends beyond civil engineering. In manufacturing processes, knowing how materials behave under thermal stress can influence production methods. For instance, when molding plastics, manufacturers must account for the expansion of the material as it heats up during processing. Failure to do so can result in defective products that do not meet specifications.In conclusion, linear expansivity is a fundamental concept that has far-reaching implications across various disciplines. Its importance cannot be overstated, as it affects everything from the stability of large infrastructures to the quality of manufactured goods. By grasping the principles of linear expansivity, professionals can make informed decisions that enhance safety, durability, and performance in their respective fields. As technology advances and we encounter new materials and challenges, the significance of understanding linear expansivity will continue to grow, emphasizing the need for ongoing education and research in this area.

理解线性膨胀性的概念在科学和工程的各个领域都是至关重要的。它指的是材料在温度变化时，尤其是长度方面改变其尺寸的倾向。随着温度的升高，材料通常会膨胀；相反，当温度下降时，它们会收缩。这种现象不仅在日常生活中可见，而且在建筑、桥梁及其他结构的设计和施工中也发挥着重要作用。例如，如果一座桥没有考虑所用材料的线性膨胀性，那么由于温度波动，它可能会随着时间的推移而遭受结构损坏。在物理学中，线性膨胀性被定量定义为单位长度在温度变化下的长度变化。通常使用的公式是：Λ = ΔL / (L0 * ΔT)，其中ΔL是长度变化，L0是原始长度，ΔT是温度变化。理解这种关系使工程师能够为特定环境选择合适的材料，确保结构能够承受热应力而不发生失效。此外，不同的材料表现出不同的线性膨胀性系数。例如，金属通常具有比陶瓷或玻璃更高的系数。这意味着在相同温度变化下，结构中的金属部件将比非金属部件扩展和收缩得更多。如果不加以管理，这种差异可能会导致接头处的翘曲或开裂。在实际应用中，工程师通常在设计中加入膨胀缝。这些缝隙专门设计用于适应由于线性膨胀性引起的预期运动。它们允许材料的自然膨胀和收缩，同时保持整体结构的完整性。如果没有这些缝隙，建筑可能会出现裂缝，桥梁可能会变得不稳定，从而导致重大安全隐患。此外，对线性膨胀性的理解超越了土木工程。在制造过程中，了解材料在热应力下的行为可以影响生产方法。例如，在塑料成型时，制造商必须考虑材料在加工过程中加热时的膨胀。如果不这样做，可能会导致不合格的产品无法满足规格。总之，线性膨胀性是一个基本概念，在各个学科中具有深远的影响。它的重要性不容小觑，因为它影响从大型基础设施的稳定性到制造产品的质量。通过掌握线性膨胀性的原理，专业人员可以做出明智的决策，从而增强各自领域的安全性、耐用性和性能。随着技术的发展，我们遇到的新材料和挑战，理解线性膨胀性的重要性将继续增长，强调在这一领域持续教育和研究的必要性。