NI Yushan CHENG Guangxu KUANG Zhenbang Xi'an Jiaotong University
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China doctorate student
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Institute of Engineering Mechanics
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Xi'an Jiaotong University
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Xi'an 710049
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China
金属学报(英文版)
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.
关键词:
welded joint
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