J Shi, C. Kumar/ Materials Science and Engineering 4250(1998)194-208 Interface roughness=0. lum Interface roughness=0.01um e3%5 连AAAA 50 Distance along contact (um) -- Interface roughness =0. lum Interface roughness=0. olum Distance along contact (um) for CMCs whose debonded interface exhibits a large 3.3. Stress distribution within the unit cell roughness it would give a high strength. However, the failure strain would be smaller due to a large So far only stresses along the interface have been stiffness discussed. The radial and axial direct stresses plus theJ. Shi, C. Kumar / Materials Science and Engineering A250 (1998) 194–208 203 Fig. 9. (Continued) for CMCs whose debonded interface exhibits a large roughness it would give a high strength. However, the failure strain would be smaller due to a large stiffness. 3.3. Stress distribution within the unit cell So far only stresses along the interface have been discussed. The radial and axial direct stresses plus the