(Part-b) Consider the cracked beam subjected to uniaxial tension shown in Figure 1. Consider fixed end and constant force boundary conditions. (Let's assume the plate thickness is t). h/3 h h/3 h/3 a L Find the strain energy release rate (per crack tip). O O O O 9P2 4Ehi 9P2 8Ehi 9Pa 4Eht 9Pa 8Eht P/2 P P/2