true stress

简明释义

实际应力

英英释义

例句

1.When analyzing stress-strain curves, the true stress provides a more accurate representation of material behavior.

在分析应力-应变曲线时，真实应力提供了材料行为的更准确表现。

2.In tensile testing, the true stress is determined by dividing the load by the actual cross-sectional area.

在拉伸测试中，真实应力是通过将载荷除以实际横截面积来确定的。

3.Understanding true stress is crucial for predicting material failure under real-world conditions.

理解真实应力对于预测材料在实际条件下的失效至关重要。

4.The concept of true stress helps engineers design safer structures by accounting for material deformation.

真实应力的概念帮助工程师通过考虑材料变形来设计更安全的结构。

5.The engineer calculated the true stress to ensure the material would withstand the applied loads.

工程师计算了真实应力以确保材料能够承受施加的载荷。

作文

In the field of materials science and engineering, understanding the mechanical properties of materials is crucial. One important concept that engineers and scientists often encounter is true stress. This term refers to the actual stress experienced by a material as it undergoes deformation, rather than the nominal stress calculated based on the original dimensions of the material. The distinction between these two types of stress is essential for accurate analysis and design in engineering applications.To better understand true stress, we must first explore the concept of nominal stress. Nominal stress is defined as the load applied to a material divided by its original cross-sectional area. This calculation assumes that the material's dimensions remain constant throughout the loading process. However, during deformation, particularly in processes such as tensile testing, the cross-sectional area of the material changes. As the material stretches, its cross-section becomes smaller, leading to an increase in stress that is not captured by the nominal stress calculation.This is where true stress comes into play. It is calculated using the instantaneous cross-sectional area of the material at any given point during deformation. Therefore, true stress provides a more accurate representation of the stress state within the material as it undergoes changes in shape and size. The formula for calculating true stress can be expressed as:true stress = Load / Instantaneous Area.By using true stress, engineers can better predict how materials will behave under different loading conditions. This is particularly important in applications where materials are subjected to high levels of stress or strain, such as in aerospace, automotive, and civil engineering structures. Understanding the true behavior of materials helps in preventing catastrophic failures and ensuring the safety and reliability of engineered systems.Moreover, the relationship between true stress and strain is crucial for determining a material's mechanical properties. The stress-strain curve, which plots true stress against strain, provides valuable information about a material's yield strength, ultimate tensile strength, and ductility. These properties are essential for selecting appropriate materials for specific applications and for designing components that can withstand expected loads.In conclusion, the concept of true stress is fundamental in the study of material behavior under load. By accounting for changes in cross-sectional area during deformation, true stress offers a more precise understanding of how materials respond to applied forces. This knowledge is vital for engineers and designers who strive to create safe and efficient structures and products. As we continue to advance in materials science, the importance of accurately measuring and interpreting true stress will only grow, further enhancing our ability to innovate and improve the performance of materials in various applications.

在材料科学和工程领域，理解材料的机械性能至关重要。工程师和科学家经常遇到的一个重要概念是真实应力。这个术语指的是材料在变形过程中所经历的实际应力，而不是基于材料原始尺寸计算的名义应力。这两种应力之间的区别对于工程应用中的准确分析和设计至关重要。为了更好地理解真实应力，我们首先需要探讨名义应力的概念。名义应力定义为施加在材料上的负载除以其原始横截面积。此计算假设材料的尺寸在加载过程中保持不变。然而，在变形过程中，特别是在拉伸测试等过程中，材料的横截面积会发生变化。随着材料的拉伸，其横截面变得更小，导致应力增加，而这一点在名义应力计算中并未体现。这就是真实应力发挥作用的地方。它是通过在变形的任意时刻使用材料的瞬时横截面积进行计算的。因此，真实应力提供了材料在形状和大小变化过程中应力状态的更准确表示。计算真实应力的公式可以表示为：真实应力 = 负载 / 瞬时面积。通过使用真实应力，工程师可以更好地预测材料在不同加载条件下的行为。这在材料承受高应力或应变的应用中尤为重要，例如航空航天、汽车和土木工程结构。了解材料的真实行为有助于防止灾难性故障，并确保工程系统的安全性和可靠性。此外，真实应力与应变之间的关系对于确定材料的机械性能至关重要。应力-应变曲线，即将真实应力与应变绘制在一起，提供了关于材料屈服强度、极限抗拉强度和延展性的重要信息。这些属性对于选择特定应用所需的合适材料以及设计能够承受预期负载的组件至关重要。总之，真实应力的概念在研究材料在负载下的行为中是基础。通过考虑变形过程中横截面积的变化，真实应力提供了对材料如何响应施加力的更精确理解。这一知识对于努力创造安全和高效结构和产品的工程师和设计师至关重要。随着我们在材料科学领域的不断进步，准确测量和解释真实应力的重要性只会增加，从而进一步增强我们在各种应用中创新和提高材料性能的能力。