About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
|
Solid-state Optical Materials and Luminescence Properties
|
Presentation Title |
A Review of Sharp Indentation to Probe Contact Damage in Glass |
Author(s) |
Brian Campbell Davis, Ivar E. Reimanis, Amanda Bellafatto, Amber Tremper, Scott Glaesemann |
On-Site Speaker (Planned) |
Ivar E. Reimanis |
Abstract Scope |
The prediction of strength degradation due to contact damage remains an important challenge in the development of glass in load-bearing applications. A key aspect is to describe how damage under an indent evolves into a crack. A review is provided here beginning with analytical descriptions of contact stress fields developed to capture certain types of cracking behaviors. A widely used analytical model developed by Yoffe is compared with a recently developed finite element model (FEM). It is demonstrated that while the analytical model successfully describes the stress field for a limited number of situations, the results are largely inconsistent with experimentally observed crack systems and with FEM, and are sometimes misleading. The FEM model is extended to examine the importance of indenter geometrical variables for several glasses. Implications on the prediction of pop-in cracking during indentation are discussed. |