Influence of empty hole on crack running in PMMA plate under dynamic loading |
| |
| Institution: | 1. School of Mechanics and Architecture Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China;2. State Key Laboratory for Geomechanics and Deep Underground Engineering, Beijing, 100083, China;3. Centre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia |
| |
| Abstract: | The influence of original prefabricated empty hole on dynamic crack propagation was studied. The dynamic behavior of crack propagation due to the impacting of drop hammer on the defective PMMA medium of manufactured hole defect (different extent of left shift, respectively, for L = 110 mm, L = 111.25 mm and L = 112.5 mm) was conducted using the test system of digital laser dynamic caustics (DLDC). The stress intensity factor and velocity at the running crack tip were analyzed. Moreover, the recently developed distinct lattice spring model (DLSM) was validated using the experimental data. It was found that the numerical modeling can reproduce the experimentally observed phenomena. Combining the experimental and numerical results, it can be concluded that the influence of empty hole defects of brittle materials on dynamic fracturing is great. |
| |
| Keywords: | Empty hole Crack propagation Brittle material Caustics Distinct lattice spring model |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
