Size Effect on Failure of Pre-stretched Free-Standing Nanomembranes.
Free-standing nanomembranes are two-dimensional materials with nanometer thickness but can have macroscopic lateral dimensions. We develop a fracture model to evaluate a pre-stretched free standing circular ultrathin nanomembrane and establish a relation between the energy release rate of a circumferential interface crack and the pre-strain in the membrane. Our results demonstrate that detachment cannot occur when the radius of the membrane is smaller than a critical size. This critical radius is inversely proportional to the Young's modulus and square of the pre-strain of the membrane.
Long
Rong
R
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, 14853, USA. rl267@cornell.edu.
Hui
Chung-Yuen
CY
Cheng
Wenlong
W
Campolongo
Michael J
MJ
Luo
Dan
D