scholarly journals Determination of mixed mode (I/II) SIFs of cracked orthotropic materials

2018 ◽  
Author(s):  
D. Chakraborty ◽  
Debaleena Chakraborty ◽  
K. S. R. K. Murthy
Keyword(s):  
Mixed Mode ◽  
Orthotropic Materials ◽  
Mode I

Mixed-Mode Testing for an Asymmetric Four-Point Bending Configuration of Polyurethane Foams

2015 ◽  
Vol 760 ◽  
pp. 239-244 ◽  
Author(s):  
Dragoş Alexandru Apostol ◽  
Dan Mihai Constantinescu ◽  
Liviu Marsavina ◽  
Emanoil Linul
Keyword(s):  
Fracture Toughness ◽  
Mixed Mode ◽  
Polyurethane Foams ◽  
Mode I ◽  
Plastic Foams ◽  
Four Point Bending ◽  
Different Types ◽  
Dynamic Loading Conditions ◽  
Static And Dynamic Loading

Many efforts have been made recently to determine the fracture toughness of different types of foams in static and dynamic loading conditions. Taking into account that there is no standard method for the experimental determination of the fracture toughness of plastic foams, different procedures and specimens were used. This paper presents the polyurethane foam fracture toughness results obtained experimentally for three foam densities. Asymmetric four-point bending specimens were used for determining fracture toughness in mode I and in a mixed one, and also the influence of the loading speed and geometry of the specimen were investigated.

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