secondary buckling

简明释义

局部压屈

英英释义

例句

1.The report highlighted the risks of secondary buckling (二次屈曲) under certain loading conditions.

报告强调了在特定载荷条件下二次屈曲（二次屈曲）的风险。

2.In structural design, it is essential to account for secondary buckling (二次屈曲) in slender elements.

在结构设计中，必须考虑到细长构件的二次屈曲（二次屈曲）。

3.The analysis showed that secondary buckling (二次屈曲) could occur at loads lower than expected.

分析显示，二次屈曲（二次屈曲）可能在低于预期的载荷下发生。

4.To prevent secondary buckling (二次屈曲), additional bracing was added to the structure.

为了防止二次屈曲（二次屈曲），在结构中增加了额外的支撑。

5.The engineer conducted tests to determine the critical load at which the column would experience secondary buckling (二次屈曲).

工程师进行测试以确定柱子在何种临界载荷下会经历二次屈曲（二次屈曲）。

作文

In the field of structural engineering, understanding various failure modes is crucial for designing safe and efficient structures. One such phenomenon that engineers must consider is secondary buckling, which refers to a form of instability that occurs after the primary buckling of a structural element. This type of buckling is particularly important in slender structures, where the initial buckling may not lead to immediate failure, but can set the stage for more complex forms of deformation. The study of secondary buckling is essential for predicting the behavior of structures under load and ensuring their integrity over time.To illustrate the concept, let’s take the example of a slender column subjected to axial loading. When the load reaches a critical level, the column may experience primary buckling, causing it to bend or deform. However, this initial deformation does not necessarily mean the structure will collapse. Instead, as the load continues to increase, the deformed shape can lead to secondary buckling, where additional bending or twisting occurs due to the altered load path and distribution. This subsequent instability can significantly reduce the load-carrying capacity of the structure, making it vital for engineers to account for it during the design phase.The implications of secondary buckling extend beyond just columns; they are relevant in various structural systems, including beams, plates, and shells. For instance, in the case of a thin-walled tube, once it undergoes primary buckling, the cross-section may distort, leading to secondary buckling as the material tries to redistribute the stresses. Engineers must use sophisticated analysis methods, such as finite element analysis (FEA), to accurately predict these behaviors and ensure that safety factors are adequately applied.Moreover, the presence of secondary buckling can influence the overall design strategy. In some cases, engineers might choose to modify the geometry of a component to enhance its resistance to both primary and secondary buckling. This could involve increasing the thickness of certain areas, adding stiffeners, or changing the material properties to improve performance under load. By understanding the mechanics behind secondary buckling, engineers can develop innovative solutions that enhance the resilience and longevity of structures.In conclusion, secondary buckling is a key consideration in structural engineering that highlights the complexities of material behavior under load. It serves as a reminder that initial failures do not always lead to total collapse, but can instead trigger further complications that must be addressed. By incorporating knowledge of secondary buckling into design practices, engineers can create safer, more reliable structures that stand the test of time. As our understanding of these phenomena continues to evolve, it is imperative that we remain vigilant in our approach to structural integrity, ensuring that we anticipate and mitigate the risks associated with both primary and secondary buckling.

在结构工程领域，理解各种失效模式对设计安全和高效的结构至关重要。其中一个工程师必须考虑的现象是二次屈曲，它指的是在结构元素的初始屈曲之后发生的一种不稳定性。这种屈曲类型在细长结构中尤为重要，因为初始屈曲可能不会导致立即失效，但可以为更复杂的变形形式奠定基础。研究二次屈曲对于预测结构在载荷下的行为以及确保其长期完整性至关重要。为了说明这一概念，让我们以一根承受轴向载荷的细长柱子为例。当载荷达到临界水平时，柱子可能会经历初始屈曲，导致其弯曲或变形。然而，这一初始变形并不一定意味着结构会崩溃。相反，随着载荷的继续增加，变形的形状可能导致二次屈曲，即由于改变的载荷路径和分布而发生额外的弯曲或扭曲。这种后续的不稳定性会显著降低结构的承载能力，因此工程师在设计阶段必须考虑到它。二次屈曲的影响不仅限于柱子；它在各种结构系统中都是相关的，包括梁、板和壳体。例如，在一根薄壁管的情况下，一旦发生初始屈曲，横截面可能会变形，从而导致材料尝试重新分配应力，引发二次屈曲。工程师必须使用先进的分析方法，如有限元分析（FEA），来准确预测这些行为，并确保安全系数得到充分应用。此外，二次屈曲的存在可能会影响整体设计策略。在某些情况下，工程师可能选择修改组件的几何形状，以增强其对初始和二次屈曲的抵抗力。这可能涉及增加某些区域的厚度、添加加强肋或改变材料属性以提高承载性能。通过理解二次屈曲背后的力学原理，工程师可以开发出创新解决方案，增强结构的韧性和耐久性。总之，二次屈曲是结构工程中的一个关键考虑因素，突显了材料在载荷下行为的复杂性。它提醒我们，初始失效并不总是导致完全崩溃，而是可能触发必须解决的进一步复杂情况。通过将对二次屈曲的知识纳入设计实践，工程师可以创建更安全、更可靠的结构，经得起时间的考验。随着我们对这些现象的理解不断发展，我们必须在结构完整性方面保持警惕，确保我们预见并减轻与初始和二次屈曲相关的风险。