J. Haslam et al. Journal of the European Ceramic Society 20(2000)607-618 Testing and Design(Second Conference), ASTM STP 497. 28. Xie, M. and Adams, D. F. Study of three- and four-point shear American Society for Testing and Materials, 1972, pp. 206-218 testing of unidirectional composite materials. Composites, 1995. 26. Mattoni. M. and Zok, F. unpublished work 26,653-659 27. Whitney. J M. and Browning. C. E, On short-beam shear tests 29. Bao, G. and Zok. F. On the strength of ductile particle rein- for composite materials. Experimental Mechanics, September forced brittle matrix composites. Acta Metall. Mate 1985,pp.294300. 41(12),3515-3524Testing and Design (Second Conference), ASTM STP 497, American Society for Testing and Materials, 1972, pp. 206±218. 26. Mattoni, M. and Zok, F., unpublished work. 27. Whitney, J. M. and Browning, C. E., On short-beam shear tests for composite materials. Experimental Mechanics, September 1985, pp. 294±300. 28. Xie, M. and Adams, D. F., Study of three- and four-point shear testing of unidirectional composite materials. Composites, 1995, 26, 653±659. 29. Bao, G. and Zok, F., On the strength of ductile particle rein￾forced brittle matrix composites. Acta Metall. Mater., 1993, 41(12), 3515±3524. 618 J.J. Haslam et al. / Journal of the European Ceramic Society 20 (2000) 607±618