Intrinsic adhesive fracture energy values

Values ofthe intrinsic adhesive fracture energy Go... 

Now, in an adhesive joint the failure plane may be situated either in the materials forming the joint or along the interface, or wander between these possible paths. Thus, the value of the intrinsic adhesive fracture energy. Go, may be expressed as a weighted mean of the various possible failure paths ... 

Table 3.5 Values of the intrinsic fracture energy, Go, and the thermodynamic work of adhesion, Wa, for a styrene-butadiene rubber adhering to various substrates [14,15,113]...

Advantages of the energy balance approach are firstly that from Equations 7.3 and 7.4 an unambiguous value of Gc may be deduced. This is true whether a thin or thick adhesive layer is employed and whether the crack propagates deep in the adhesive layer or at, or near, an interface. As will be seen later, determination of the fracture toughness, Kc, of a joint is not always so straightforward. Secondly, the value of Gc may be related to the intrinsic... 

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