permissible stress

简明释义

容许应力

英英释义

例句

1.The engineer calculated the permissible stress to ensure the beam could support the load without failure.

工程师计算了允许应力以确保梁能够在不发生失效的情况下支撑负载。

2.The design specifications included a detailed analysis of the permissible stress for each component.

设计规范包括对每个组件的允许应力的详细分析。

3.Regular inspections help ensure that the actual stress remains below the permissible stress levels.

定期检查有助于确保实际应力保持在允许应力水平以下。

4.Before construction, it's crucial to know the permissible stress of the materials used.

在施工之前，了解所用材料的允许应力是至关重要的。

5.Exceeding the permissible stress can lead to structural damage or collapse.

超过允许应力可能导致结构损坏或倒塌。

作文

In the field of engineering and construction, understanding the concept of permissible stress is essential for ensuring the safety and durability of structures. Permissible stress refers to the maximum amount of stress that a material can withstand without experiencing failure or permanent deformation. This concept is critical in the design phase of any construction project, as it helps engineers determine the appropriate materials and dimensions to use for various components of a structure.When designing a building or a bridge, engineers must take into account the different forces that will act upon the structure, such as weight, wind, and seismic activity. By calculating the permissible stress for the materials selected, they can ensure that these materials will not fail under expected loads. For example, steel has a high permissible stress, making it a popular choice for structural beams and columns. In contrast, materials like wood or concrete have lower permissible stress values, which means they must be used more carefully to avoid failure.Moreover, the permissible stress is not a fixed value; it can vary based on several factors, including temperature, humidity, and the presence of defects in the material. Engineers often apply safety factors to the permissible stress to account for these uncertainties. A safety factor is a multiplier applied to the permissible stress that provides a buffer against unexpected conditions. For instance, if the permissible stress of a material is determined to be 200 MPa, an engineer may choose to use a safety factor of 1.5, resulting in a design stress limit of only 133.3 MPa. This ensures that even under unforeseen circumstances, the material will perform safely.Understanding permissible stress also plays a role in the maintenance and inspection of existing structures. Over time, materials can degrade or experience fatigue, which may reduce their permissible stress. Regular inspections help identify potential issues before they lead to catastrophic failures. If a material is found to be operating close to its permissible stress, engineers can recommend repairs or reinforcements to extend the life of the structure.In conclusion, the concept of permissible stress is fundamental in engineering and construction. It ensures that structures are designed and maintained to withstand the forces they encounter throughout their lifespan. By accurately assessing the permissible stress of materials and applying appropriate safety factors, engineers can create safe, reliable, and durable structures that serve society’s needs. As technology advances and new materials are developed, the understanding of permissible stress will continue to evolve, leading to even safer and more efficient designs in the future.

在工程和建筑领域，理解允许应力的概念对于确保结构的安全性和耐久性至关重要。允许应力指的是材料在不发生失效或永久变形的情况下能够承受的最大应力。这一概念在任何建筑项目的设计阶段都是至关重要的，因为它帮助工程师确定在各种结构组件中使用合适的材料和尺寸。在设计建筑物或桥梁时，工程师必须考虑将作用于结构的不同力，例如重量、风和地震活动。通过计算所选材料的允许应力，他们可以确保这些材料在预期负载下不会失效。例如，钢材具有较高的允许应力，使其成为结构梁和柱的热门选择。相比之下，像木材或混凝土这样的材料具有较低的允许应力值，因此必须更加小心使用，以避免失效。此外，允许应力并不是一个固定值；它可能会根据多种因素而变化，包括温度、湿度以及材料中缺陷的存在。工程师通常会对允许应力应用安全系数，以应对这些不确定性。安全系数是施加于允许应力的乘数，为意外情况提供缓冲。例如，如果某种材料的允许应力被确定为200 MPa，工程师可能选择使用1.5的安全系数，从而导致设计应力限制仅为133.3 MPa。这确保了即使在不可预见的情况下，该材料也能安全地表现。理解允许应力在现有结构的维护和检查中也起着重要作用。随着时间的推移，材料可能会退化或经历疲劳，这可能会降低它们的允许应力。定期检查有助于在潜在问题导致灾难性故障之前识别它们。如果发现某种材料的操作接近其允许应力，工程师可以建议进行修复或加固，以延长结构的使用寿命。总之，允许应力的概念在工程和建筑中是基础性的。它确保结构被设计和维护以承受其整个生命周期内遇到的力量。通过准确评估材料的允许应力并应用适当的安全系数，工程师可以创建安全、可靠且耐用的结构，以满足社会的需求。随着技术的进步和新材料的发展，对允许应力的理解将继续发展，从而在未来实现更安全、更高效的设计。