microcracks

简明释义

英[ˈmaɪkrəʊkræks]美[ˈmaɪkroʊkræks]

n. 微裂隙

英英释义

单词用法

同义词

反义词

例句

1.As brittle material, the cutting process is complexity, it is in general discontinuous and it is caused by the growth and propagation of the microcracks in Indus trial ceramics.

作为典型的高硬度脆性材料，其切削复杂，切削过程是一个不连续的过程，而内部微裂纹扩展是导致断裂和产生切屑原因。

2.As brittle material, the cutting process is complexity, it is in general discontinuous and it is caused by the growth and propagation of the microcracks in Indus trial ceramics.

作为典型的高硬度脆性材料，其切削复杂，切削过程是一个不连续的过程，而内部微裂纹扩展是导致断裂和产生切屑原因。

3.Seismic velocity anisotropies are mainly caused by lattice preferred orientation( LPO) , shape preferred orientation( SPO) of the major minerals, and oriented microcracks.

影响各向异性的主要因素有岩石的结构构造、矿物的晶格优选方位（LPO）、形态优选方位（SPO）和定向微裂隙。

4.The stable growth of cracks in a brittle material with three mutually perpendicular families of microcracks under proportional tensile loads was studied.

提出了含三相正交分布等尺寸微裂纹的准脆性材料稳定扩展的细观损伤演化模型。

5.One reasonable explanation is that etching removes and blunts microcracks.

有一种合理的解释是说腐蚀能够去掉并钝化微裂纹。

6.It is suggested that the broken crystal layer and microcracks in surface layer of the cold drawn rod is the source of the heat treatment induced cracks.

GH105合金冷拉棒表面存在的碎晶层和其内部的显微裂纹是热处理裂纹源。

7.During the inspection, the technician noted that the ceramic tiles had developed microcracks (微裂纹) over time.

在检查过程中，技术员注意到陶瓷砖随着时间的推移出现了微裂纹。

8.The study found that microcracks (微裂纹) can significantly weaken the material properties of metals.

研究发现，微裂纹会显著削弱金属的材料特性。

9.Researchers are studying how microcracks (微裂纹) in concrete can affect the overall strength of a structure.

研究人员正在研究混凝土中的微裂纹如何影响结构的整体强度。

10.The presence of microcracks (微裂纹) in the glass can lead to its eventual failure under stress.

玻璃中的微裂纹可能导致其在压力下最终失效。

11.The engineer discovered that the bridge had developed several microcracks (微裂纹) during routine maintenance.

工程师在例行维护中发现桥梁出现了几条微裂纹。

作文

In the field of materials science, understanding the behavior of materials under stress is crucial for ensuring their longevity and performance. One of the phenomena that researchers focus on is the presence of microcracks (微裂纹). These tiny fractures can significantly influence the mechanical properties of a material, leading to failure if not properly addressed. This essay will explore the nature of microcracks, their formation, and their implications in various applications.Microcracks are small cracks that typically measure less than a millimeter in length. They can occur in a variety of materials, including metals, ceramics, and polymers. The formation of microcracks often results from repeated loading and unloading cycles, thermal expansion, or environmental factors such as moisture and temperature changes. For instance, in concrete structures, microcracks may develop due to shrinkage as the material cures, or as a result of freeze-thaw cycles that induce stress within the concrete matrix.The presence of microcracks can be both beneficial and detrimental. On one hand, microcracks can help in dissipating stress throughout a material, thereby preventing larger cracks from forming. This mechanism is observed in some composite materials where controlled microcracks enhance toughness. On the other hand, if microcracks propagate unchecked, they can lead to catastrophic failure. In metals, for example, the growth of microcracks under cyclic loading conditions can result in fatigue failure, a common issue in structural components subjected to repeated stress.To mitigate the risks associated with microcracks, engineers and material scientists employ various strategies. One approach is to enhance the material's resistance to crack formation through the use of additives or by altering the manufacturing process. For example, the addition of fibers to concrete can help bridge microcracks and prevent them from growing into larger fissures. Additionally, regular inspection and maintenance of structures can help identify the presence of microcracks early, allowing for timely repairs before significant damage occurs.Moreover, advancements in technology have made it possible to detect microcracks using non-destructive testing methods. Techniques such as ultrasonic testing and acoustic emission monitoring can identify microcracks before they become a serious threat. By employing these technologies, engineers can ensure the integrity of critical infrastructure like bridges, dams, and buildings, ultimately safeguarding public safety.In conclusion, microcracks (微裂纹) are an important consideration in the study of material performance. While they can serve a purpose in energy dissipation, their uncontrolled growth poses a significant risk to the structural integrity of materials. Understanding the mechanisms behind microcracks and implementing effective monitoring and maintenance strategies are essential for preventing failure and extending the lifespan of materials in various applications. As research continues to evolve, the knowledge gained about microcracks will undoubtedly lead to the development of stronger, more resilient materials that can withstand the challenges of modern engineering.

在材料科学领域，理解材料在应力下的行为对于确保其耐久性和性能至关重要。研究人员关注的现象之一是存在的微裂纹（microcracks）。这些微小的裂缝可以显著影响材料的机械性能，如果不加以处理，会导致失效。本文将探讨微裂纹的性质、形成及其在各种应用中的影响。微裂纹是通常长度小于一毫米的小裂缝。它们可以出现在多种材料中，包括金属、陶瓷和聚合物。微裂纹的形成通常是由于重复加载和卸载循环、热膨胀或环境因素（如湿度和温度变化）造成的。例如，在混凝土结构中，微裂纹可能由于材料固化时的收缩而发展，或由于导致混凝土基体内部应力的冻融循环。微裂纹的存在既可以是有利的，也可以是有害的。一方面，微裂纹可以帮助材料内部的应力分散，从而防止较大裂缝的形成。这种机制在某些复合材料中观察到，其中控制的微裂纹增强了韧性。另一方面，如果微裂纹不受控制地扩展，它们可能导致灾难性的失败。例如，在金属中，微裂纹在循环加载条件下的生长可能导致疲劳失效，这是在承受重复应力的结构组件中常见的问题。为了减轻与微裂纹相关的风险，工程师和材料科学家采用各种策略。一种方法是通过使用添加剂或改变制造过程来增强材料对裂纹形成的抵抗力。例如，在混凝土中添加纤维可以帮助桥接微裂纹，防止它们发展成更大的裂缝。此外，定期检查和维护结构可以帮助早期识别微裂纹的存在，从而在重大损坏发生之前进行及时修复。此外，技术的进步使得能够使用无损检测方法检测微裂纹。超声波检测和声发射监测等技术可以在微裂纹成为严重威胁之前识别它们。通过采用这些技术，工程师可以确保关键基础设施（如桥梁、大坝和建筑物）的完整性，最终保障公众安全。总之，微裂纹（microcracks）是材料性能研究中的一个重要考虑因素。虽然它们可以在能量耗散中发挥作用，但其不受控制的增长对材料的结构完整性构成重大风险。理解微裂纹背后的机制并实施有效的监测和维护策略对于防止失效和延长各种应用中材料的使用寿命至关重要。随着研究的不断发展，关于微裂纹的知识无疑将推动开发出更强大、更具韧性的材料，以应对现代工程的挑战。