TY - JOUR
T1 - Measuring fracture energy in a brittle polymeric material
AU - Arakawa, K.
AU - Mada, T.
N1 - Funding Information:
Acknowledgment This research was supported by Grants-in-Aid from the Japan Society for the Promotion of Science (Grants No.15360059 and 16560074).
PY - 2006/6
Y1 - 2006/6
N2 - The dynamic fracture behavior of a brittle polymer, polymethyl methacrylate (PMMA), was studied using single-edge-cracked tensile specimens and the method of caustics in combination with high-speed photography. The dynamic response of the specimen and the state of local stress near the crack tip, i.e., the stress intensity factor K, were measured. To analyze the dynamic response, the external work, Uex, applied to the specimen was partitioned into three components: the elastic energy, Ee; non-elastic energy, En, due to viscoelastic and plastic deformation; and fracture energy, Ef, for creating a new fracture surface, As. The results showed that Ee, En, and Ef increased with Uex, and the ratio Ef/Uex was about 46% over a wide range of Uex. Energy release rates were estimated using Gt = Uex/As and Gf = Ef/As. The mean energy release rate, Gm, during dynamic crack propagation was also determined using the value of K. A good correlation between Gf and Gm was found.
AB - The dynamic fracture behavior of a brittle polymer, polymethyl methacrylate (PMMA), was studied using single-edge-cracked tensile specimens and the method of caustics in combination with high-speed photography. The dynamic response of the specimen and the state of local stress near the crack tip, i.e., the stress intensity factor K, were measured. To analyze the dynamic response, the external work, Uex, applied to the specimen was partitioned into three components: the elastic energy, Ee; non-elastic energy, En, due to viscoelastic and plastic deformation; and fracture energy, Ef, for creating a new fracture surface, As. The results showed that Ee, En, and Ef increased with Uex, and the ratio Ef/Uex was about 46% over a wide range of Uex. Energy release rates were estimated using Gt = Uex/As and Gf = Ef/As. The mean energy release rate, Gm, during dynamic crack propagation was also determined using the value of K. A good correlation between Gf and Gm was found.
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U2 - 10.1007/s11340-006-6417-5
DO - 10.1007/s11340-006-6417-5
M3 - Article
AN - SCOPUS:33745951257
SN - 0014-4851
VL - 46
SP - 347
EP - 353
JO - Experimental Mechanics
JF - Experimental Mechanics
IS - 3
ER -