Conditions of Debonding

Shear type (Mode-II) prevented and limited debonding under compression. The shear type debonding makes possible a free sliding movement between the debonding surfaces, if tension is present, i.e., a 0. If, on the other hand, compression is active, this holds back the free movement after debonding has occurred. Two cases should be considered, based on the frictional behavior of the debonded surfaces. 

If the compressive force, based on the radial stress tr, and the coefficient of friction p, produces a potential friction stress greater than the resultant shear stress T, j, the potential friction force prevents the sliding motion of the debonded surfaces. The condition of prevented debonding is 

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