Debonding behavior

Fig. 1.8 A schematic indicating the sliding and debonding behavior envisaged in...

The chemistry ofthe whiskers is important since it affects many areas in fabrication and final composite properties. The bulk chemistry influences the stability ofthe whiskers at high temperatures and in reactive environments. The surface chemistry can change the interface properties between the whisker and the matrix and thereby change the debonding behavior... 

When Sun et al. [42] used tn-stfuscanning electron microscopy (SEM) to observe the interaction between the cracks and the microstmctures, the interfacial debonding behavior between the large fibrous grains and the intergranular glass was seen to vary... 

Hsueh, G. S. Painter, S. B. Waters, S. L. Hwang, and M. J. Hoffmann, Debonding Behavior Between (3 Si3N4 Whiskers and Oxynitride Glasses With And Without An Epitaxial (3 SiAION Interfacial Layer, Acta. Mater., 47(9) 2777 85 (1999). 

The model follows an incremental technique, i.e., both the prescribed displacement and the load are incremented, and contains interface elements all the way around each fiber in order to model the debonding behavior (see Section 5.1.2). 

B. V feiler, C. Grosse and H.W. Reinhardt, Debonding behavior of steel fibres with hooked ends , Paper 35 in H.W. Reinhardt and A.E. Naaman (eds) Proceedings of... 

NaOH solution and in 3.5%(Wt.) solution of NaCl. Thus, the upper curve, showing the volume change in the presence of hydroxide ion, will be typical of the behavior of the primer at the debond during cathodic delamination. 

O Brien, T.K. (1985). Analysis of local deaminations and their influence on composite laminate behavior. In Delamination and Debonding of Materials, ASTM STP 876 (W.S. Johnson, ed.) ASTM, Philadelphia, PA. p 282. 

Three underlying mechanisms are responsible for the nonlinearity.17,18 (1) Frictional dissipation occurs at the fiber/matrix interfaces, whereupon the sliding resistance of debonded interfaces, r, becomes a key parameter. Control of t is critical. This behavior is dominated by the fiber coating, as well as the fiber morphology.19,20 By varying r, the prevalent damage mechanism and the resultant non-linearity can be dramatically modified. (2) The matrix cracks... 

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