|Experimental Investigation of Dynamic Fracture Behaviors of Polymethyl Methacrylate|
|Gao GY; Zhou J; Li Z; Li, Z (reprint author), Peking Univ, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China.; Li, Z (reprint author), Peking Univ, Coll Engn, Beijing 100871, Peoples R China.
|Source Publication||MACROMOLECULAR SYMPOSIA
|Conference Name||23rd World Forum on Advanced Polymeric Materials (POLYCHAR)
|Conference Date||MAY 11-15, 2015
|Conference Place||Univ Nebraska Lincoln, Lincoln, NE
|Abstract||Dynamic fracture of polymers plays a vital role in engineering applications. Dynamic fracture behaviors of polymethyl methacrylate were studied using the optical method of caustics. Semi-circular bending specimens were chosen for mixed-mode fracture and crack interaction analysis. The crack initiation, crack propagation, stress intensity factor, and fracture toughness were obtained by analyzing the specke patterns captured during dynamic loading by high-speed imaging techniques. The crack interactions of two symmetric and asymmetric cracks and the influence of damage, including the presence of holes and microcracks on or near the crack path, are discussed. The results show that two cracks on a specimen compete and interact with each other, and lead to the final fracture mode of the specimens. Holes and microcracks on or near the crack path influence the crack path and the crack propagation velocity. The results obtained in this paper could be extended to brittle fracture analysis of materials with multiple cracks or inclusions.|
Optical Method Of Caustics
Stress Intensity Factor
Semicircular Bend Technique
|Corresponding Author||Li, Z (reprint author), Peking Univ, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China.; Li, Z (reprint author), Peking Univ, Coll Engn, Beijing 100871, Peoples R China.|
Gao GY,Zhou J,Li Z,et al. Experimental Investigation of Dynamic Fracture Behaviors of Polymethyl Methacrylate[C]MACROMOLECULAR SYMPOSIA,2016.