Fracture toughness of glass

Table 5.16. Strength and fracture toughness of glass polyalkenoate filling materials Seed Wilson, 1980 Prosser et al., 1984 Lloyd Mitchell, 1984 Goldman, 1985 Prosser, Powis Wilson, 1986 Lloyd Adamson, 1987)...

Hill, R. G., Wilson, A. D. Warrens, C. P. (1989). The influence of poly(acrylic acid) molecular weight on the fracture toughness of glass-ionomer cements. Journal of Materials Science, 24, 363-71. 

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. 8. Apparent fracture toughnesses of glass fibre laminates, with laminate angles Indicated on the curves.

P Davies, F Pomies and L A Carlsson, Influence of water absorption on transverse tensile properties and shear fracture toughness of glass/polypropylene , / Compos Mater 1996 30(9) 1004-1019. 

Are Arencon, D., Velasco, J. I., Realinho, V., Sanchez-Soto, M., GordUlo, A. Fracture toughness of glass microsphere-filled polypropylene and polypropylene/poly (ethylene terephthalate-co-isophthalate) blend-matrix composites. J. Mater. Sci. 42 (2007) 19-29. 

Fig. 8. Critical energy release rate (fracture toughness) of glass-fiber/epoxy composites, with the fibers being heat-treated (bare), and ABS- and APS-treated glass (29).

Kelkar et al. [145] investigated the Mode I fracture toughness of glass fiber reinforced composites incorporated with tetraethyl-orthosilicate (TEOS) nanofibrous interlayers and alumina nanoparticles. They found no significant improvement, however only one interlaminar layer was placed between 10 layers of glass fabric. On the other hand, they experienced significant increase in Gju in the case of alumina nanoparticles. Nanoparticles can also be constructed from nanofibers through phase-separation. 

Tsai, J.L., Huang, B.H., Cheng, Y.L., 2009. Enhancing fracture toughness of glass/epoxy composites by using rubber particles together with silica nanoparticles. Journal of composite materials 43, 3107—3123. 

W.A. Patterson and H.C. Chan, Fracture toughness of glass reinforced cement . Composites. 6,102-104. 

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).

Chlup, Z., Dlouhy, I., Boccaccini, A.R. (2001), Fracture toughness of thermally shocked SiC-fibre reinforced glass matrix composite , in Krenkel, W., Naslain, R., Schneider, H. (editors), High Temperature Ceramic Matrix Composites, Wiley, 463-468. 

In addition to the initial work in the alumina and mullite matrix systems previously mentioned, SiC whiskers have also been used to reinforce other ceramic matrices such as silicon nitride,9-13 glass,14 15 magnesia-alumina spinel,16 cordierite,17 zirconia,18 alumina/zirconia,18 19 mullite/zirconia,18-21 and boron carbide.22 A summary of the effect of SiC whisker additions on the mechanical properties of various ceramics is given in Table 2.1. As shown, the addition of whiskers increases the fracture toughness of the ceramics in all cases as compared to the same monolithic materials. In many instances, improvements in the flexural strengths were also observed. Also important is the fact that these improvements over the monolithic materials are retained at elevated temperatures in many cases. 

---