ISSN:
1573-2673
Keywords:
PVC foam
;
mixed-mode
;
sandwich construction
;
toughness
;
fracture
;
CTS testing
;
finite element analysis
;
cellular material
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract This paper reports on mixed-mode fracture in rigid cellular PVC foam based on experimental and numerical analyses. Experiments were performed on sharp-cracked specimens using the compact-tension-shear (CTS) test loading device. Foams of three different densities were tested. The CTS specimen was, in association with a special loading device, an appropriate apparatus for experimental mixed-mode fracture analysis. Experimentally-obtained fracture toughness results show good consistency. KIC fracture toughness was marginally different in different directions. The ratio KII C/KI C was found to be between 0.4 and 0.65 depending on the foam density. For mixed-mode loading, Richard's criterion – using experimentally obtained KI C and KII C – was the best in predicting accurately fracture locus and fracture angle. When no experimental data were used, the maximum hoop stress criterion predicted best kinking angle. The principal strain criterion predicted the best fracture locus. Fracture boundary curve and kinking angle were best predicted for low mode II contribution.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1007495223740
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