| 焊接表面裂纹的工程评定 |
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| 引用本文： | 霍立兴,王宏达.焊接表面裂纹的工程评定[J].天津大学学报(自然科学与工程技术版),1987(3). |
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| 作者姓名： | 霍立兴 王宏达 |
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| 作者单位： | 天津大学机械制造工程系
(霍立兴)，天津大学机械制造工程系(王宏达) |
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| 摘 要： | 本文通过宽板拉伸试验,根据全面屈服准则和COD参量直接研完和评定了焊接构件中的表面裂纹。指出依据COD概念不能合理地评定和保证具有表面裂纹构件的安全性,而全面屈服准则是评定构件表面缺陷的有力工具。因为他不但保证构件具有不低于屈服限的强度,而且还具有良好的塑性。本文同时还详细地讨论了低温对表面裂纹极限尺寸的影响,
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| 关 键 词： | 全面屈服 韧带屈服 裂纹张开位移 表面裂纹 断裂应力 贯穿裂纹 准则 |
ENGINEERING ASSESSMENT OF WELDED SURFACE CRACKS |
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| Huo Lixing Wang Hongda.ENGINEERING ASSESSMENT OF WELDED SURFACE CRACKS[J].Journal of Tianjin University(Science and Technology),1987(3). |
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| Authors: | Huo Lixing Wang Hongda |
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| Institution: | Department of Mechanical Engineering |
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| Abstract: | The surface cracks in welded structures are assessed and investigated directly by the wide plate test according to the general yielding criteria and COD parameter. It is worth noting that the safety of structures with welded surface cracks cannot be assessed by the COD concept reasonably, and that the general yielding criterion is a most valuable tool for the surface defects. It gurantees a strength equal to the yielding strength and a good overal plastic deformation.
Meanwhile, the effect of low temperatures on critical size of surface cracks in welded structures are discussed in detail. |
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| Keywords: | general yielding ligament yielding COD surface crack fractur estress through crack criterion |
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