Glass fibers fracture

Fig. SEM images of an E-glass fiber fracture surface showing a platinum inclusion in the bulk. The fiber strength was 745 MPa (Gupta, 1994).

Corrosion attack on the polymer is influenced by permeation rate, as weU as internal stresses or fatigue, that distorts or fractures the resin glass fiber... 

Fig. 5. Interlaminar fracture toughness, for a number of thermosetting and thermoplastic composites (36,37). Open white bars represent glass-fiber composites shaded bars are for carbon fibers. The materials are A, polyester (unidirectional) B, vinyl ester (CSM = chopped strand mat) C, epoxy (R/BR1424) D, epoxy (T300/914) E, PPS F, PES and G, PEEK. To convert J/m to fdbf/in. multiply by 2100.

Suzuki, Y., Maekawa, Z., Hamada, H., Yokoyama, A. and Sugihara, T. (1993). Influence of silane coupling agents on interlaminar fracture in glass fiber fabric reinforced unsaturated polyester laminates. J. Mater. Sci. 28, 1725-1723. 

Ac can be approximated to Cf if Cm is neglected in brittle matrix composites (Harris, 1980). It is shown that Rd( contributes substantially to the total fracture toughness of glass fiber-polymer matrix composites (Harris et al, 1975 Kirk et al., 1978 Beaumont and Anstice, 1980 Munro and Lai, 1988). 

Fig. 6.8. Fracture toughness, K, of short glass fiber-thermoplastics injection molded composites as a function of weight fraction of fiber, fVr. (O) and (A) polyethylene terephthalate (PET) matrix ( ) and (A) polycarbonate (PC) matrix. Notches made transverse (O, ) and parallel (A, A) to the mold fill direction,...

The failure processes in thermoplastics composites with aligned glass fibers of sub-critical transfer length have been characterized (Lauke and Schultrich, 1983, 1986a, b Lauke et al., 1985 Lauke and Pompe, 1988) in terms of matrix fracture mode which is determined mainly by the ductility of the matrix material, loading rate and temperature. The total specific work of fracture, / t, is expressed as the sum... 

Fig. 6.9. Normalized fracture toughness, (Kc - AKQ)/K. of short glass fiber-thermoplastics injection molded composites as a function of reinforcing effectiveness parameter, ft (O) polyetheretherketone (PEEK) matrix (K = 6.5 MPa m) (A) polytetrafluoroethylene (PTFE) matrix (K = 1.9 MPaym).

Beaumont P.W.R. and Anstice P.D. (1980). A failure analysis of the micro-mechanisms of fracture of carbon fiber and glass fiber composites in monotonic loading. J. Mater. Sci. 15, 2691-2635. 

Gershon B. and Marom G. (1975). Fracture toughness and mechanical properties of glass fiber-epoxy composites. J. Mater. Sci. 10, 1549-1556. 

Karger-Kocsis J. and Friedrich K. (1988). Fracture behaviour of injection-molded short and long glass fiber-polyamide 6.6 composites. Composites Sci. Techno . 32, 293-325,... 

Kirk J.N., Munro M. and Beaumont P.W.R. (1978). The fracture energy of hybrid carbon and glass fiber composites. J. Mater. Sci. 13, 2197-2204. 

Lauke B. and Schultrich B. (1986a). Calculation of fracture work of short glass fiber reinforced polyethylene for static and dynamic loading rates. Composites Sci. Technol. 26, 1-16. 

Lhymn C. and Schultz J.M. (1983). Fracture behaviour collimated thermoplastic poly(ethylene terephthalate) reinforced with short E-glass fiber. J. Mater. Sci. 18, 2029-2046. 

Munro M. and Lai C.P.Z. (1988). The elevated-temperature dependence of fracture energy mechanisms by hybrid carbon-glass fiber reinforced composites. J. Mater. Sci. 23, 3129-3136. 

Sato N., Kurauchi T., and Kamigaito O. (1985). In situ SEM observation of fracture in short glass fiber reinforced thermoplastic composites. In Fracture Mechanics Sixteenth Symposium, ASTM STP 868 (M.F. Kanninen and A.T. Hopper, eds.), ASTM, Philadelphia, PA, pp. 493-503. 

Solar, M.A. and Belzunce, F.J. (1989). Fracture toughness and R-curves of glass fiber reinforced polyester. Composites 20. 120-124. 

Voss H. and Friedrich K. (1986). Fracture and fatigue of short glass fiber reinforced PTFE composites. J. Mater. Sci. Lett. 5, 569-572. 

Fig. 7.24. Predicted fracture toughness of carbon and glass fiber-polymer matrix composites (CFRP and GFRP) with varying matrix shrinkage stress, n. After Piggott (1981).

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