caa a22 4500 469123036 CHVBK 20180323133144.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF00013005 doi (NATIONALLICENCE)springer-10.1007/BF00013005 The initiation and growth of delaminations induced by matrix microcracks in laminated composites [Elektronische Daten] [J. Nairn, S. Hu] A recent variational mechanics analysis of microcracking damage in cross-ply laminates of the form [(S)/90 n ]s , where (S) is any orthotropic sublaminate much stiffer than [90 n ], has been extended to account for the presence of delaminations emanating from the tips of microcracks in the [90 2n ] T sublaminate. The new two-dimensional stress analysis is used to calculate the total strain energy, effective modulus, and longitudinal thermal expansion coefficient for a laminate having microcracks and delaminations. These results are used to calculate the energy release rate for the initiation and growth of a delamination induced by a matrix microcrack. At low crack densities, [(S)/90 n] s laminates are expected to fail by microcracking and to show little or no delamination. At some critical crack density, which is a function of laminate structure and material properties, the energy release rate for delamination exceeds that for microcracking and delamination is predicted to dominate over microcracking. A quasi-three-dimensional model is used to predict the propagation of arbitrarily shaped delamination fronts. All predictions agree with experimental observations. Kluwer Academic Publishers, 1992 Nairn J. Department of Material Science and Engineering, University of Utah, 84112, Salt Lake City, Utah, USA aut Hu S. Department of Material Science and Engineering, University of Utah, 84112, Salt Lake City, Utah, USA aut International Journal of Fracture Kluwer Academic Publishers 57/1(1992-09-01), 1-24 0376-9429 57:1<1 1992 57 10704 https://doi.org/10.1007/BF00013005 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00013005 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nairn J. Department of Material Science and Engineering, University of Utah, 84112, Salt Lake City, Utah, USA aut NATIONALLICENCE 700 1- Hu S. Department of Material Science and Engineering, University of Utah, 84112, Salt Lake City, Utah, USA aut NATIONALLICENCE 773 0- International Journal of Fracture Kluwer Academic Publishers 57/1(1992-09-01), 1-24 0376-9429 57:1<1 1992 57 10704 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer