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Mechanics in Engineering ›› 2004, Vol. 26 ›› Issue (2): 0-0.doi: 10.6052/1000-0992-2003-001

• Education Study •    

MEASUREMENT OF VOID SHAPE FROM THE FRACTURE SURFACE USING THE 3-DIMENSIONAL SEM DATA

  

  • Received:2003-01-03 Revised:1900-01-01 Online:2004-04-10 Published:2004-04-10

Abstract: The tensile tests are conducted and the void shape is measured using the 3-dimensional SEM (scanning electron microscope) on the tensile test ductile fracture surface by changing the notch radius of tensile test specimens, which is made of the SiC reinforced metal matrix composite material. The effects of void configuration and coalescence under the different stress-triaxiality condition are analyzed. The results show that the average void aspect ratio increases with the average void size. It means that the stress triaxiality and strain constraint play an important role during the damage process. These experimental results could be used to correctly simulate the ductile damage process of the metal matrix material under the multi-dimensional loads, to propose a reasonable strength evaluation method and to reveal the ductile damage mechanism.

Key words: stress triaxiality, void shape, ductile damage