TY - JOUR
T1 - Comparative study of the fracture toughness determination of a polymer-bonded explosive simulant
AU - Zhou, Zhongbin
AU - Chen, Pengwan
AU - Duan, Zhuoping
AU - Huang, Fenglei
PY - 2011/12
Y1 - 2011/12
N2 - In this paper, a comparative study was carried out by using three-point bending, semi-circular bending, and flattened Brazilian disc tests to measure the plane-strain fracture toughness of a polymer-bonded explosive simulant. The KIC magnitudes are 0.53±0.03MPam1/2, 0.50±0.02MPam1/2, and 0.53±0.01MPam1/2 respectively, showing good consistency in the results measured by different methods. Considering the difficulties in the machining and pre-crack fabrication of brittle explosives, the flattened Brazilian disc test is recommended as an alternative method for measuring the KIC of PBX and other explosives. In addition, real-time microscopic observation of test samples was conducted by using a scanning electron microscope (SEM) equipped with a loading stage, and the fracture surfaces of samples were examined. The damage modes and the corresponding failure mechanisms were analyzed.
AB - In this paper, a comparative study was carried out by using three-point bending, semi-circular bending, and flattened Brazilian disc tests to measure the plane-strain fracture toughness of a polymer-bonded explosive simulant. The KIC magnitudes are 0.53±0.03MPam1/2, 0.50±0.02MPam1/2, and 0.53±0.01MPam1/2 respectively, showing good consistency in the results measured by different methods. Considering the difficulties in the machining and pre-crack fabrication of brittle explosives, the flattened Brazilian disc test is recommended as an alternative method for measuring the KIC of PBX and other explosives. In addition, real-time microscopic observation of test samples was conducted by using a scanning electron microscope (SEM) equipped with a loading stage, and the fracture surfaces of samples were examined. The damage modes and the corresponding failure mechanisms were analyzed.
KW - Flattened Brazilian disc test
KW - Fracture toughness
KW - Polymer-bonded explosive
KW - Semi-circular bending test
UR - http://www.scopus.com/inward/record.url?scp=80054865106&partnerID=8YFLogxK
U2 - 10.1016/j.engfracmech.2011.08.017
DO - 10.1016/j.engfracmech.2011.08.017
M3 - Article
AN - SCOPUS:80054865106
SN - 0013-7944
VL - 78
SP - 2991
EP - 2997
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
IS - 17
ER -