scholarly journals Routine evaluation of Interfacial Adhesion in Fibre Reinforced Plastics

1994 ◽  
Vol 3 (6) ◽  
pp. 096369359400300
Author(s):  
E.U. Okoroafor ◽  
A–M. Priston ◽  
R. Hill
Keyword(s):  
Interfacial Adhesion ◽  
Strain Range ◽  
Relative Number ◽  
Stress And Strain ◽  
Matrix Interface ◽  
Interfacial Failure ◽  
Reinforced Plastics ◽  
Transverse Tension ◽  
Damage Process ◽  
Fibre Matrix

The predominant damage process occurring, when unidirectional composites are subjected to transverse tension, is interfacial failure events which are detected as acoustic emission(AE) by a transducer in contact with the test piece. The stress and strain range over which these AE events occur determine the strength of the fibre—matrix interface, while the relative number of recorded events give indication as to the interfacial failure mode.

On the mechanism of tensile fracture in notched fibre reinforced plastics

1978 ◽  
Vol 361 (1706) ◽  
pp. 325-341 ◽  
Keyword(s):  
Fracture Stress ◽  
Transverse Crack ◽  
Fracture Criterion ◽  
Experimental Results ◽  
Tensile Fracture ◽  
Structural Factors ◽  
Matrix Interface ◽  
Reinforced Plastics ◽  
Fibre Matrix ◽  
Fracture Processes

By observation of the tensile fracture processes occurring in continuous fibre reinforced plastics, the micro-structural factors which govern the unstable propagation of a transverse crack have been identified. A tensile fracture criterion is thereby developed in which the notch sensitivity is related to the properties of the fibre, matrix and fibre/ matrix interface. The fracture criterion is applied to elliptically notched laminates, whence predictions of the effect of notch size on tensile fracture stress are compared with experimental results for circular notches of various diameters.

Some observations on the nature of fibre reinforced plastics and the implications for structural design

1980 ◽  
Vol 294 (1411) ◽  
pp. 507-517 ◽  
Keyword(s):  
Structural Design ◽  
Marked Effect ◽  
Construction Materials ◽  
Resin Composites ◽  
Matrix Interface ◽  
Reinforced Plastics ◽  
Transverse Cracking ◽  
Wide Range ◽  
The Matrix ◽  
Fibre Matrix

Fibre reinforced plastics exhibit many phenomena not found in conventional construction materials and these can have a marked effect both on the performance of structures made from them and, by implication, on the way in which such structures are designed. This paper considers three of the more interesting phenomena, namely compressive behaviour, tensile notch sensitivity and transverse cracking in multidirectional laminates. The latter two phenomena both involve failure of the matrix or fibre/matrix interface which, perhaps paradoxically, has a beneficial effect in one case but is detrimental in the other. Although the paper refers primarily to carbon fibre-epoxy resin composites, the conclusions and design implications relate to a wide range of fibre reinforced materials.

An Energy-Based interpretation of Interfacial Adhesion from Single Fibre Composite Fragmentation Testing

1993 ◽  
Vol 2 (5) ◽  
pp. 096369359300200 ◽  
Author(s):  
H.D. Wagner ◽  
S. Ling
Keyword(s):  
Interfacial Adhesion ◽  
Mechanical Characteristics ◽  
Interfacial Shear Strength ◽  
Fibre Composite ◽  
Stress Transfer ◽  
Single Fibre ◽  
Transfer Length ◽  
Fragmentation Test ◽  
Energy Balance Approach ◽  
Fibre Matrix

An energy balance approach is proposed for the single fibre composite (or fragmentation) test, by which the degree of fibre-matrix bonding is quantified by means of the interfacial energy, rather than the interfacial shear strength, as a function of the fibre geometrical and mechanical characteristics, the stress transfer length, and the debonding length. The validity of the approach is discussed using E-glass fibres embedded in epoxy, both in the dry state and in the presence of hot distilled water.

Three-Dimensional Elasticity Solution of a Composite Beam

1967 ◽  
Vol 1 (2) ◽  
pp. 122-135 ◽  
Author(s):  
Staley F. Adams ◽  
M. Maiti ◽  
Richard E. Mark
Keyword(s):  
Three Dimensional ◽  
Solid Wood ◽  
Theory Of Elasticity ◽  
Orthotropic Materials ◽  
Stress And Strain ◽  
Cantilever Beams ◽  
Dimensional Theory ◽  
Reinforced Plastics ◽  
Three Dimensional Elasticity ◽  
Moduli Of Elasticity

This investigation was undertaken to develop a rigorous mathe matical solution of stress and strain for a composite pole con sisting of a reinforced plastics jacket laminated on a solid wood core. The wood and plastics are treated as orthotropic materials. The problem of bending of such poles as cantilever beams has been determined by the application of the principles of three- dimensional theory of elasticity. Values of all components of the stress tensor in cylindrical coordinates are given for the core and jacket. Exact values for the stresses have been obtained from computer results, using the basic elastic constants—Poisson's ratios, moduli of elasticity and moduli of rigidity—for each ma terial. A comparison of the numerical results of the exact solu tion with strength of materials solutions has been completed.

Fibre-Matrix Interface Development during High Temperature Exposition of Long Fibre Reinforced SiOC Matrix

2013 ◽  
Vol 592-593 ◽  
pp. 401-404
Author(s):  
Zdeněk Chlup ◽  
Martin Černý ◽  
Adam Strachota ◽  
Martina Halasova ◽  
Ivo Dlouhý
Keyword(s):  
High Temperature ◽  
Crack Formation ◽  
Fracture Behaviour ◽  
Point Of View ◽  
Reinforced Composites ◽  
Matrix Interface ◽  
Significant Damage ◽  
The Matrix ◽  
Fibre Matrix ◽  
Fibre Reinforced Composites

The fracture behaviour of long fibre reinforced composites is predetermined mainly by properties of fibre-matrix interface. The matrix prepared by pyrolysis of polysiloxane resin possesses ability to resist high temperatures without significant damage under oxidising atmosphere. The application is therefore limited by fibres and possible changes in the fibre matrix interface. The study of development of interface during high temperature exposition is the main aim of this contribution. Application of various techniques as FIB, GIS, TEM, XRD allowed to monitor microstructural changes in the interface of selected places without additional damage caused by preparation. Additionally, it was possible to obtain information about damage, the crack formation, caused by the heat treatment from the fracture mechanics point of view.

Fracture toughness of the fibre-matrix interface in glass-epoxy composites

1996 ◽  
Vol 31 (23) ◽  
pp. 6145-6153 ◽  
Author(s):  
A. Pegoretti ◽  
M. L. Accorsi ◽  
A. T. Dibenedetto
Keyword(s):  
Fracture Toughness ◽  
Epoxy Composites ◽  
Matrix Interface ◽  
Fibre Matrix
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