Journal Published Online: 16 August 2022
Volume 51, Issue 2

Dynamic Fracture Characteristics of Polymethyl Methacrylate with Two Symmetrical Prefabricated Notches

CODEN: JTEVAB

Abstract

In this article, the dynamic fracture of polymethyl methacrylate specimen with two symmetrical prefabricated notches was investigated by dynamic caustics experiment and distinct lattice spring model (DLSM). Three variables in respect of the pitch between these prefabricated notches, a = 10 mm, 15 mm, and 20 mm, were designed here. The failure form, crack propagation trajectory, crack propagation velocity, stress state at crack tip, ratio of damaged lattice, and load-displacement curve of the specimen under different working conditions were analyzed and compared. Results show that DLSM can invert the results very well. Finally, the impact factors (support constraints and heterogeneity) involved in this experiment were quantitatively analyzed by DLSM.

Author Information

Wang, Yanbing
School of Mechanics and Architecture Engineering, China University of Mining and Technology (Beijing), Beijing, China State Key Laboratory for Geomechanics and Deep Underground Engineering, Beijing, China
Wang, Zhaoyang
School of Mechanics and Architecture Engineering, China University of Mining and Technology (Beijing), Beijing, China
Geng, Yanjie
School of Mechanics and Architecture Engineering, China University of Mining and Technology (Beijing), Beijing, China
Ren, Bin
School of Mechanics and Architecture Engineering, China University of Mining and Technology (Beijing), Beijing, China
Fu, Dairui
School of Mechanics and Architecture Engineering, China University of Mining and Technology (Beijing), Beijing, China
Pages: 20
Price: $25.00
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Stock #: JTE20220142
ISSN: 0090-3973
DOI: 10.1520/JTE20220142