Elastic properties of dislocation 上清充通大学 SHEAMGRAI DUD TONO UHTVEREETTY Stress field of screw dislocation The elastic field in cylindrical polar coordinate 0 Note:No strain in radial direction 0 0 T-0 0 b L 2才 Z b z0 Y0:= 2·π·r Gb tg:=t:0=GY6:= 2π Institute of Forming Technology Equipment 10Elastic properties of dislocation Institute of Forming Technology & Equipment 10  The elastic field in cylindrical polar coordinate  Note: No strain in radial direction Stress field of screw dislocation θ L r0 b z x y   z z  r P L b z   z   z z  z  2 r P r b z       2 r Gb z z G z        2       0 0 0 0 0 0 0     z z