Experimental determination of validated, critical interfacial modes I and II energy release rates in a composite sandwich panel

2012 ◽  
Vol 94 (2) ◽  
pp. 477-483 ◽  
Author(s):  
Paul Davidson ◽  
Anthony M. Waas ◽  
Chandra S. Yerramalli
Keyword(s):  
Experimental Determination ◽  
Energy Release ◽  
Sandwich Panel ◽  
Release Rates ◽  
Composite Sandwich ◽  
Energy Release Rates

A review of the determination of energy release rates for strips in tension and bending. Part II – dynamic solutions

1993 ◽  
Vol 28 (4) ◽  
pp. 247-256 ◽  
Author(s):  
J G Williams
Keyword(s):  
Steady State ◽  
Kinetic Energy ◽  
Energy Release ◽  
Release Rate ◽  
Moving Loads ◽  
Release Rates ◽  
Wave Speeds ◽  
Transient Solutions ◽  
Energy Release Rates

Energy release rate calculations are performed for a flexible strip peeling from a substrate and including the effects of kinetic energy. The effects of various wave speeds are demonstrated. Solutions for an axially loaded strip are then explored, including the transient solutions and those for steady-state conditions. The methods developed are then used for cases involving the bending of strips, including those of moving loads. It is demonstrated that these methods of analysis are of value in the analysis of test specimens and of use in design.

A review of the determination of energy release rates for strips in tension and bending. Part I – static solutions

1993 ◽  
Vol 28 (4) ◽  
pp. 237-246 ◽  
Author(s):  
J G Williams
Keyword(s):  
Energy Release ◽  
Release Rates ◽  
Elastic Plastic ◽  
Plastic Materials ◽  
Wide Range ◽  
Static Solutions ◽  
Energy Release Rates ◽  
Elastic Plastic Materials ◽  
Peel Tests

It is shown that solutions for the energy release rate G may be obtained for a uniform strip by simply considering the change in length. The simplicity of the system enables a wide range of boundary conditions and material properties to be incorporated into the analysis and G may be computed for elastic and elastic-plastic materials. Inextensible flexible strips are considered first as they are useful for modelling peel tests and these results are developed to cover elastic and elastic-plastic behaviour. Elastic strips in tension are also considered and the analysis is developed to include transverse loading which induces bending. General considerations of path and loading history dependence are also included.

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