TY - GEN
T1 - Mixed-mode I/II fracture of amorphous diamond-like carbon films
AU - Jonnalagadda, Krishna
AU - Chasiotis, Ioannis
PY - 2006
Y1 - 2006
N2 - Mixed-mode I/II stress intensity factors were obtained from experiments conducted on tetrahedral amorphous diamond-like carbon (ta-C) MEMS-scale specimens. The thin film ta-C specimens contained sharp edge precracks that were generated using microindentation. The crack angle varied in the range of 7°-32° resulting in varying mode mixity (K II/K I) at the crack tip. The microscale freestanding fracture specimens were loaded in uniaxial tension and the load at failure was measured and used to calculate the mixed-mode I/II stress intensity factors, K I and K II, by a finite element solution. For the limited range of pre-crack angles employed here, the resulting stress intensity factor values were comparable to those obtained for brittle materials tested at the macro scale using similar specimen geometries.
AB - Mixed-mode I/II stress intensity factors were obtained from experiments conducted on tetrahedral amorphous diamond-like carbon (ta-C) MEMS-scale specimens. The thin film ta-C specimens contained sharp edge precracks that were generated using microindentation. The crack angle varied in the range of 7°-32° resulting in varying mode mixity (K II/K I) at the crack tip. The microscale freestanding fracture specimens were loaded in uniaxial tension and the load at failure was measured and used to calculate the mixed-mode I/II stress intensity factors, K I and K II, by a finite element solution. For the limited range of pre-crack angles employed here, the resulting stress intensity factor values were comparable to those obtained for brittle materials tested at the macro scale using similar specimen geometries.
KW - MEMS
KW - Stress intensity factors
KW - Thin films
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M3 - Conference contribution
AN - SCOPUS:33750380235
SN - 091205395X
SN - 9780912053950
T3 - Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006
SP - 1353
EP - 1357
BT - Proceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006
T2 - SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006
Y2 - 4 June 2006 through 7 June 2006
ER -