TY - GEN
T1 - Mixed mode fracture in brittle materials for MEMS
AU - Jonnalagadda, Krishna
AU - Chasiotis, Ioannis
AU - Friedmann, Thomas
PY - 2006/1/1
Y1 - 2006/1/1
N2 - Planar defects such as cracks are rarely normal to the loading direction. To investigate the case of arbitrarily oriented cracks mixed mode I/II fracture experiments were conducted on amorphous diamond-like carbon (ta-C) thin films. The mixed mode I/II loading at the crack tip was obtained using oblique edge pre-cracks in uniform gage finite width tensile specimens. The pre-cracks were generated using microindentation in 1μm thick micro-tensile specimens. Uniaxial tensile tests were performed to measure the applied far-field stress at failure and a numerical solution was used to extract the stress intensity factor values. The results were compared against the maximum tensile stress (MTS) and maximum energy release rate (MERR) criteria for mixed mode fracture and the data showed good agreement.
AB - Planar defects such as cracks are rarely normal to the loading direction. To investigate the case of arbitrarily oriented cracks mixed mode I/II fracture experiments were conducted on amorphous diamond-like carbon (ta-C) thin films. The mixed mode I/II loading at the crack tip was obtained using oblique edge pre-cracks in uniform gage finite width tensile specimens. The pre-cracks were generated using microindentation in 1μm thick micro-tensile specimens. Uniaxial tensile tests were performed to measure the applied far-field stress at failure and a numerical solution was used to extract the stress intensity factor values. The results were compared against the maximum tensile stress (MTS) and maximum energy release rate (MERR) criteria for mixed mode fracture and the data showed good agreement.
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U2 - 10.1115/IMECE2006-13832
DO - 10.1115/IMECE2006-13832
M3 - Conference contribution
AN - SCOPUS:84920631261
SN - 0791837904
SN - 9780791837900
T3 - American Society of Mechanical Engineers, Micro-Electro Mechanical Systems Division, (Publications) MEMS
BT - Proceedings of 2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006 - Microelectromechanical Systems
PB - American Society of Mechanical Engineers (ASME)
T2 - 2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006
Y2 - 5 November 2006 through 10 November 2006
ER -