caa a22 4500 38806787X CHVBK 20180307125138.0 cr unu---uuuuu 161130e199906 xx s 000 0 eng 10.1017/S1727719100000332 doi S1727719100000332 pii (NATIONALLICENCE)cambridge-10.1017/S1727719100000332 Pan Huang Hsing Department of Civil Engineering, National Kaohsiung Institute of Technology, Kaohsiung, Taiwan 807, R.O.C An Overall Approach for Microcrack and Inhomogeneity Toughening in Brittle Solids [Elektronische Daten] [Huang Hsing Pan] Based on the weight function theory and Hutchinson's technique, the analytic form of the toughness change near a crack-tip is derived. The inhomogeneity toughening is treated as an average quantity calculated from the mean-field approach. The solutions are suitable for the composite materials with moderate concentration as compared with Hutchinson's lowest order formula. The composite has the more toughened property if the matrix owns the higher value of the Poisson ratio. The composite with thin-disc inclusions obtains the highest toughening and that with spheres always provides the least effective one. For the microcrack toughening, the variations of the crack shape do not significantly affect the toughness change if the Budiansky and O'Connell crack density parameter is used. The explicit forms for three types of the void toughening and two types of the microcrack toughening are also shown. Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 1999 Toughening nationallicence Microcrack nationallicence Void nationallicence Inhomogeneity nationallicence Journal of Mechanics Cambridge University Press 15/2(1999-06), 57-68 1727-7191 15:2<57 1999 15 JOM https://doi.org/10.1017/S1727719100000332 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S1727719100000332 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Pan Huang Hsing Department of Civil Engineering, National Kaohsiung Institute of Technology, Kaohsiung, Taiwan 807, R.O.C NATIONALLICENCE 773 0- Journal of Mechanics Cambridge University Press 15/2(1999-06), 57-68 1727-7191 15:2<57 1999 15 JOM CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge