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Structural Health Monitoring with Piezoelectric Wafer Active Sensors, 2nd Edition by Victor Giurgiutiu

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image (77)

B.11.2 Plane-Strain Conditions

Plane-strain conditions are used in the analysis of structures that are very thick in the z-direction. The z-direction strain is assumed zero (εzz=0)image. Also zero are the shear strains εyz=0image and εzx=0image. Hence, the 3-D elasticity relations (39) that express stresses in terms of strains are reduced to

σxx=E(1+ν)

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