Mechanical modeling of Lateral Cracking in Brittle Materials under Indentation
- 10.2991/mems.2012.53How to use a DOI?
- indentation; the lateral crack; the cavity expansion model; the sterss intensify factors; the energy release rate
Experiments have indicated that when brittle materials are under indentation, various forms of cracks including median crack, ring crack, Hertzian crack and side (lateral) crack nucleate leading to the fragmentation. The lateral cracking under indentation can be attributed to unloading and plays a crucial role in formation of chips. Based on the mechanism of the lateral cracking, we have investigated a penny shaped crack parallel to surface under indentation with unloading. The stress intensity factors (SIFs) and the energy release rate haven been calculated. It has been found that there exists a crack size at which both SIF and the energy release rate attains maximum values. Relationship between the indentation force and that crack size has been obtained numerically. The influences of the dilatancy angle and unloading have been also demonstrated
- © 2012, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Liu Ji-Peng AU - Huang Gan-Yun PY - 2012/12 DA - 2012/12 TI - Mechanical modeling of Lateral Cracking in Brittle Materials under Indentation BT - Proceedings of the 1st International Conference on Mechanical Engineering and Material Science (MEMS 2012) PB - Atlantis Press SP - 195 EP - 198 SN - 1951-6851 UR - https://doi.org/10.2991/mems.2012.53 DO - 10.2991/mems.2012.53 ID - Ji-Peng2012/12 ER -