true stress

简明释义

真实应力

英英释义

例句

1.The difference between engineering stress and true stress becomes significant during plastic deformation.

工程应力和真实应力之间的差异在塑性变形过程中变得显著。

2.When analyzing tensile tests, the true stress can be calculated using the instantaneous load and the current cross-sectional area.

在分析拉伸试验时，可以使用瞬时载荷和当前横截面积来计算真实应力。

3.The true stress at fracture provides insights into the ductility of the material.

断裂时的真实应力提供了对材料延展性的洞察。

4.To accurately predict failure, engineers must consider true stress rather than just nominal stress.

为了准确预测失效，工程师必须考虑真实应力而不仅仅是名义应力。

5.In material science, the calculation of true stress is essential for understanding how materials behave under load.

在材料科学中，计算真实应力对于理解材料在载荷下的行为至关重要。

作文

In the field of materials science and engineering, understanding the mechanical properties of materials is crucial for designing safe and efficient structures. One important concept that engineers must grasp is true stress. The term true stress refers to the actual stress experienced by a material when it is subjected to an external load, taking into account the changes in its cross-sectional area as it deforms. This is in contrast to nominal stress, which assumes that the cross-sectional area remains constant during deformation. When a material is loaded, it begins to deform, and as it deforms, its cross-sectional area decreases. The true stress is calculated using the formula: true stress = load / instantaneous cross-sectional area. This means that as the material continues to stretch or compress, the true stress provides a more accurate representation of the internal forces at play within the material. For example, consider a tensile test performed on a metal specimen. Initially, when the load is applied, the specimen has a certain cross-sectional area, and we can calculate the nominal stress. However, as the specimen elongates, its cross-sectional area diminishes, leading to an increase in true stress. This relationship is critical in predicting failure points and understanding the material's behavior under different loading conditions. Engineers often use true stress in conjunction with true strain, which accounts for the actual deformation of the material. Together, these concepts help in creating stress-strain curves that are essential for characterizing materials. The area under the curve can indicate the toughness of the material, while the peak point reveals the ultimate tensile strength. Moreover, the significance of true stress extends beyond just theoretical calculations. In practical applications, knowing the true stress helps engineers design components that can withstand real-world conditions. For instance, in aerospace engineering, where materials are subjected to extreme forces and temperatures, accurate knowledge of true stress is vital for ensuring safety and performance. In conclusion, the concept of true stress is fundamental in materials science and engineering. It allows for a more precise understanding of how materials behave under load, leading to better design practices and enhanced safety. As engineers continue to innovate and create new materials, the importance of accurately measuring and interpreting true stress will remain a cornerstone of engineering education and practice. Understanding this concept not only aids in the development of stronger and more reliable materials but also ensures that structures and components can perform as intended without catastrophic failure.

在材料科学和工程领域，理解材料的力学性能对于设计安全高效的结构至关重要。工程师必须掌握的一个重要概念是true stress。术语true stress指的是材料在受到外部载荷时所经历的实际应力，它考虑了材料变形时横截面积的变化。这与名义应力相对，后者假设在变形过程中横截面积保持不变。当材料被加载时，它开始变形，随着变形，其横截面积减小。true stress的计算公式为：true stress = 载荷 / 瞬时横截面积。这意味着，随着材料继续拉伸或压缩，true stress提供了一个更准确的内部力的表示。例如，考虑对金属试件进行的拉伸试验。最初，当施加载荷时，试件具有一定的横截面积，我们可以计算名义应力。然而，随着试件的延伸，其横截面积减少，导致true stress增加。这种关系对于预测失效点和理解材料在不同加载条件下的行为至关重要。工程师通常将true stress与true strain结合使用，后者考虑了材料的实际变形。这两个概念一起帮助创建应力-应变曲线，这对于表征材料是必不可少的。曲线下方的面积可以指示材料的韧性，而峰值点揭示了极限抗拉强度。此外，true stress的重要性不仅仅局限于理论计算。在实际应用中，了解true stress有助于工程师设计能够承受现实条件的组件。例如，在航空航天工程中，材料承受极端的力和温度，准确了解true stress对于确保安全和性能至关重要。总之，true stress的概念在材料科学和工程中是基础性的。它允许对材料在载荷下的行为有更精确的理解，从而导致更好的设计实践和增强的安全性。随着工程师不断创新和创造新材料，准确测量和解释true stress的重要性将继续成为工程教育和实践的基石。理解这一概念不仅有助于开发更强大、更可靠的材料，还能确保结构和组件能够按照预期执行，而不会发生灾难性故障。