MIE Distinguished Seminar Series: From Photoelaticity to Nanospeckle Photography, From 2D to 3D – The Evolution of Full-Field Optical Stress/Strain Analysis Techniques

Date(s) - 03/11/2017

Speaker: Fu-Pen Chiang, SUNY Distinguished Professor 
Affiliation: Stony Brook University
Location: MC 102
Date and time: November 3, 2017, 11 AM – 12 PM


Experimental stress/strain analysis techniques maybe categorized into two types: point-wise technique and full-field technique. While the former has its advantages, it suffers from a major deficiency in that the gauges or sensors may not be placed at the most critical parts of the specimen or structure being tested. Thus full-field techniques are necessary if one is not to miss these critical parts. Full-field optical technique offers an additional advantage in that it is visual. In this seminar I shall describe the evolution of major full-field optical techniques over the past 60 years ranging from photoelasticity, classical moire methods, moire interferometry, holographic interferometry, laser speckle interferometry and photography, white light speckle methods, electron speckle photography, and 2D and 3D digital speckle photography techniques. In each technique I shall critique its advantages and deficiencies, if any.

Speaker biosketch

Fu-pen Chiang’s research emphasis is on the development of optical and other experimental mechanics techniques and their applications to stress analysis (including NDE), fracture and fatigue of engineering and biological materials and structures. He has written over 400 journal and conference articles published in 58 archival journals and numerous conference proceedings. He has given invited lectures at 23 institutions in 17 countries and was a visiting faculty of Cambridge University (Cavendish Laboratory), Swiss Federal Institute of Technology (Lausanne), National Taiwan University, Tsinghua University (Beijing and Taiwan), among others.  His research has been supported by NSF, NIH, ARO, ONR, AFOSR, DOT and industrial concerns. Dr. Chiang is a Fellow of American Society of Mechanical Engineers, SPIE – International Society of Optics and Photonics, Optical Society of America, Society for Experimental Mechanics, and a member of National Academy of Inventors. He received Theocaris Award (2015), Frocht Award (2008) and Lazan Award (1993) from the Society of Experimental Mechanics and the Life Time Achievement Medal (2012) from the International Conference of Computational and Experimental Engineering and Sciences. In 2016 he received the Life Time Achievement Award from the European Society of Experimental Mechanics at the 17th International Conference on Experimental Mechanics held in Rhodes, Greece. He served as Editor of Int. J. Optics of Lasers in Engineering, Associate Editor of J. of Experimental Mechanics and ASME J. of Engineering Materials and Technology. He also served as Guest Editor for four special issues of J. Optical Engineering, and organized many international and national conferences.