School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai,200030, P.R.China School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai,200030, P.R.China School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai,200030, P.R.China School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai,200030, P.R.China;
photoelastic; stress; intensity; factors; isochromatic; fringe; V-shaped; notch;