期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 125, 期 7, 页码 4277-4283出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.0c11302
关键词
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资金
- Mid-Career Researcher Support Program of the National Research Foundation (NRF) of Korea [2019R1A2C2011312]
- Meta-Structure Based Seismic Shielding Research Fund of UNIST [1.200043.01]
- National Research Foundation of Korea [2019R1A2C2011312] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study shows that the fracture behavior of cracked metal nanoplates is size-dependent. Smaller cracked nanoplates exhibit elastic instability-dominant fracture followed by ductile behavior, while larger cracked nanoplates exhibit brittle fracture. The transition in fracture behavior is due to the competition between the crack and the free surfaces.
In this study, we show that the fracture mode of (001) cracked metal nanoplates is strongly dependent on the size through molecular dynamics simulations. Cracked nanoplates with smaller sizes exhibit an elastic instabilitydominant fracture followed by a ductile behavior, whereas larger cracked nanoplates exhibit a brittle fracture. A brittle fracture is caused by an embedded crack, whereas the elastic instability-dominant fracture is due to a failure of the nanoplate by elastic instability, which is influenced by the surface effect. We provide numerical and theoretical evidence to show that the transition in the fracture behavior of a cracked metal nanoplate is due to the competition between the crack and the free surfaces.
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