| FRACTAL ANALYSIS OF FRACTURE SURFACE OF WELDED JOINT UNDER LOW CYCLE FATIGUE |
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| 作者姓名： | NI Yushan CHENG Guangxu KUANG Zhenbang Xi'an Jiaotong University China doctorate student Institute of Engineering Mechanics Xi'an Jiaotong University Xi'an China |
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| 作者单位： | NI Yushan CHENG Guangxu KUANG Zhenbang Xi'an Jiaotong University，China doctorate student，Institute of Engineering Mechanics，Xi'an Jiaotong University，Xi'an 710049，China |
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| 摘 要： | Hausdorff dimension of fracture surface roughness of welded joint,both welding metal andheat-affected zone.of pressure vessel steel 16MnR,tested under strain-controlled low-cyclefatigue,was examined with computer vision srstem and by two-dimensional variation method.Results show that it decreases with the increase of cyclic hysteresis energy.The Hausdorff di-mension variation at heat-affected zone is greater than that of weld metal.It is believed thatthe greater the fractal dimension is,the longer the fatigue life will be.
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| 收稿时间： | 1993-06-25 |
| 修稿时间： | 1993-06-25 |
FRACTAL ANALYSIS OF FRACTURE SURFACE OF WELDED JOINT UNDER LOW CYCLE FATIGUE |
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| NI Yushan CHENG Guangxu KUANG Zhenbang Xi''''an Jiaotong University,China doctorate student,Institute of Engineering Mechanics,Xi''''an Jiaotong University,Xi''''an ,China.FRACTAL ANALYSIS OF FRACTURE SURFACE OF WELDED JOINT UNDER LOW CYCLE FATIGUE[J].Acta Metallurgica Sinica(English Letters),1993,6(3):172-178. |
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| Authors: | NI Yushan CHENG Guangxu KUANG Zhenbang Xi'an Jiaotong University China doctorate student |
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| Affiliation: | NI Yushan CHENG Guangxu KUANG Zhenbang Xi'an Jiaotong University,China doctorate student,Institute of Engineering Mechanics,Xi'an Jiaotong University,Xi'an,China |
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| Abstract: | Hausdorff dimension of fracture surface roughness of welded joint,both welding metal and heat-affected zone.of pressure vessel steel 16MnR,tested under strain-controlled low-cycle fatigue,was examined with computer vision srstem and by two-dimensional variation method. Results show that it decreases with the increase of cyclic hysteresis energy.The Hausdorff di- mension variation at heat-affected zone is greater than that of weld metal.It is believed that the greater the fractal dimension is,the longer the fatigue life will be. |
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| Keywords: | welded joint low-cycle fatigue fractograph Hausdorff dimension |
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