Equation icon  Experimental complaince method for composite testing

 
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Resource type: Equation
Description: In the Double Cantilever Beam (DCB) test, a measure of mode I fracture energy can be obtained using the experimental compliance method. It is assumed that the compliance (C=δ/P) is related to the crack length (a) by the equation C=kan, where k and n are constants. A plot of log(c) vs log(a) gives a linear graph with the gradient equal to n.

TeX format: {G_{Ic} = \frac{n P \delta}{2Ba}}

GIc {G_{Ic}} = mode I fracture energy (J.m-2) {J.m^{-2}}
n {n} = gradient of log(c) vs log(a)
P {P} = force (N) {N}
δ {\delta} = displacement at point of force (m) {m}
B {B} = sample width (m) {m}
a {a} = distance from P to crack tip (m) {m}

Keywords: DCB • double • Cantilever • beam • testing • mechanical • composites
Categories: Science approaches
Materials > Hybrids > Composites
Testing, analysis & experimentation > Mechanical testing
Created by: The University of Liverpool
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Date created: 18 August 2010
Date added: 14 September 2010
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Resource ID: 3210