Journal article

Publication year: 2023

Pages: 177-186

Journal: Dental Materials Journal

Volume number: 42

Issue number: 2

ISSN: 0287-4547

Open access status: Gold

DOI Link: https://doi.org/10.4012/dmj.2022-163

Publisher: Japanese Society for Dental Materials and Devices

Abstract: 
An insight into the fracture behavior of dental polymer-based biomaterials is important to reduce safety hazards for patients. The crack-driven fracture process of polymers is largely stochastic and often dependent on the loading rate. Therefore, in this study, a statistical model was developed based on three-point bending tests on dental polymethyl methacrylate at different loading rates. The fracture strains were investigated (two-parameter Weibull distribution (2PW)) and the rate-dependency of the 2PW parameters were examined (Cramer-von Mises test (CvM)), arriving at the conclusion that there could be a limiting distribution for both quasi-static and dynamic failure. Based on these findings, a phenomenological model based on exponential functions was developed, which would further facilitate the determination of the failure probability of the material at a certain strain with a given strain rate. The model can be integrated into finite element solvers to consider the stochastic fracture behavior in simulations.

Harvard Citation style: Schrader, P., Schmidt, A., Schlenz, M., Kolling, S., Wostmann, B. and Berlinger, M. (2023) A statistical model of the rate-dependent fracture behavior of dental polymer-based biomaterials, Dental Materials Journal, 42(2), pp. 177-186. https://doi.org/10.4012/dmj.2022-163

APA Citation style: Schrader, P., Schmidt, A., Schlenz, M., Kolling, S., Wostmann, B., & Berlinger, M. (2023). A statistical model of the rate-dependent fracture behavior of dental polymer-based biomaterials. Dental Materials Journal. 42(2), 177-186. https://doi.org/10.4012/dmj.2022-163