Moire interferometry method is introduced to study the feasibilities of J integral as a plastic singularity parameter at the tip of the notch in the welded joints. The results show that J dominance in most studied cas...Moire interferometry method is introduced to study the feasibilities of J integral as a plastic singularity parameter at the tip of the notch in the welded joints. The results show that J dominance in most studied cases is not validated in v and u displacement fields. Therefore, it can be concluded that J-integral as controlling parameter used to estimate the safety of welded structures is not always valid.展开更多
A method based on the wavelet transform is proposed for processing white light Interferograms from optical fiber interferometers.With this method,the envelope and the zero optical path difference(ZOPD) of white light ...A method based on the wavelet transform is proposed for processing white light Interferograms from optical fiber interferometers.With this method,the envelope and the zero optical path difference(ZOPD) of white light interferograms are obtained with high accuracy.The results agree well with those obtained by the method of center of gravity.Reasons for the insensitivity to noises of this method are discussed.The method is expected to be useful when processing white light interferograms from optical fiber interferometers,especially with low signal-to-noise ratio.展开更多
文摘Moire interferometry method is introduced to study the feasibilities of J integral as a plastic singularity parameter at the tip of the notch in the welded joints. The results show that J dominance in most studied cases is not validated in v and u displacement fields. Therefore, it can be concluded that J-integral as controlling parameter used to estimate the safety of welded structures is not always valid.
文摘A method based on the wavelet transform is proposed for processing white light Interferograms from optical fiber interferometers.With this method,the envelope and the zero optical path difference(ZOPD) of white light interferograms are obtained with high accuracy.The results agree well with those obtained by the method of center of gravity.Reasons for the insensitivity to noises of this method are discussed.The method is expected to be useful when processing white light interferograms from optical fiber interferometers,especially with low signal-to-noise ratio.
