coefficient of thermal expansion

简明释义

热膨胀系数

英英释义

例句

1.The coefficient of thermal expansion 热膨胀系数 for glass is much lower than that of aluminum.

玻璃的热膨胀系数 热膨胀系数 远低于铝的。

2.Different materials have different coefficients of thermal expansion 热膨胀系数, which can affect their compatibility in construction.

不同材料具有不同的热膨胀系数 热膨胀系数，这会影响它们在建筑中的兼容性。

3.The coefficient of thermal expansion 热膨胀系数 of metals is generally higher than that of ceramics.

金属的热膨胀系数 热膨胀系数 通常高于陶瓷。

4.Engineers must consider the coefficient of thermal expansion 热膨胀系数 when designing bridges to prevent structural failure.

工程师在设计桥梁时必须考虑热膨胀系数 热膨胀系数 以防止结构失效。

5.When heated, the coefficient of thermal expansion 热膨胀系数 of rubber causes it to stretch significantly.

当加热时，橡胶的热膨胀系数 热膨胀系数 会导致其显著伸长。

作文

The concept of coefficient of thermal expansion is fundamental in understanding how materials behave under temperature changes. This coefficient measures the extent to which a material expands when it is heated and contracts when it cools. It is expressed as a fractional change in length per degree of temperature change. For engineers and architects, knowing the coefficient of thermal expansion of various materials is crucial for designing structures that can withstand temperature fluctuations without suffering damage. For example, consider the construction of bridges. Bridges are subjected to varying temperatures throughout the year. During hot summer days, the metal components of a bridge may expand significantly. If the coefficient of thermal expansion is not taken into account during the design phase, this expansion could lead to structural failures, such as buckling or cracking. Therefore, engineers must calculate the expected expansion and incorporate features such as expansion joints that allow for this movement.Similarly, in the manufacturing of electronic devices, the coefficient of thermal expansion plays a critical role. Different materials, such as metals, plastics, and ceramics, expand at different rates. If these materials are bonded together, the differing expansions can cause stress at the joints, potentially leading to failure. Manufacturers must carefully select materials with compatible coefficient of thermal expansion values to ensure reliability and longevity of their products.In addition to engineering applications, the coefficient of thermal expansion is also important in everyday life. For instance, when cooking, a glass baking dish may crack if it is placed directly from the refrigerator into a hot oven. This occurs because the glass expands rapidly due to the heat, but the inner part of the dish, which is still cold, does not expand at the same rate. Understanding the coefficient of thermal expansion can help us avoid such mishaps in our kitchens.Moreover, in climate science, the coefficient of thermal expansion is significant when studying the effects of global warming on sea levels. As ocean water warms, it expands, contributing to rising sea levels. Scientists measure the coefficient of thermal expansion of seawater to predict how much sea levels will rise as temperatures increase. This understanding is vital for coastal planning and environmental protection efforts.In summary, the coefficient of thermal expansion is a key parameter in various fields, including engineering, manufacturing, cooking, and environmental science. Its implications are far-reaching, affecting everything from the safety of our infrastructure to the functionality of our electronic devices and the health of our planet. By grasping the significance of the coefficient of thermal expansion, we can better appreciate the complexities of material behavior and the importance of thoughtful design in our daily lives.

热膨胀系数的概念在理解材料在温度变化下的行为中是基础性的。该系数测量材料在加热时膨胀和冷却时收缩的程度。它以每度温度变化的长度变化的分数表示。对于工程师和建筑师来说，了解各种材料的热膨胀系数对于设计能够承受温度波动而不受损害的结构至关重要。例如，考虑桥梁的建设。桥梁在一年中的不同时间会受到不同温度的影响。在炎热的夏季，桥梁的金属部件可能会显著膨胀。如果在设计阶段没有考虑热膨胀系数，这种膨胀可能导致结构故障，例如翘曲或开裂。因此，工程师必须计算预期的膨胀，并结合扩展接头等特征，以允许这种运动。同样，在电子设备的制造中，热膨胀系数也起着关键作用。不同的材料，如金属、塑料和陶瓷，其膨胀速率不同。如果这些材料粘合在一起，膨胀的差异可能在接缝处造成应力，可能导致故障。制造商必须仔细选择具有相容热膨胀系数值的材料，以确保其产品的可靠性和耐用性。除了工程应用外，热膨胀系数在日常生活中也很重要。例如，在烹饪时，如果将一个玻璃烤盘直接从冰箱放入热烤箱，它可能会破裂。这是因为玻璃由于热量迅速膨胀，但盘子的内侧仍然是冷的，没有以相同的速度膨胀。理解热膨胀系数可以帮助我们避免在厨房中出现这样的意外。此外，在气候科学中，热膨胀系数在研究全球变暖对海平面影响时也很重要。随着海洋水温升高，水会膨胀，导致海平面上升。科学家们测量海水的热膨胀系数，以预测随着温度升高，海平面将上升多少。了解这一点对于沿海规划和环境保护工作至关重要。总之，热膨胀系数是在工程、制造、烹饪和环境科学等多个领域中的关键参数。它的影响深远，影响着我们的基础设施安全、电子设备的功能以及我们星球的健康。通过掌握热膨胀系数的重要性，我们可以更好地理解材料行为的复杂性，以及在日常生活中周到设计的重要性。