In a composite material with a brittle matrix and brittle fibers, if the strain to fracture of the fibers is greater than the strain to fracture of the matrix, which of the following is not true?
(a) The slope of the composite stress-strain curve has a discontinuity at the fracture strain of the matrix.
(b) The stress in the composite increases after the matrix is fractured and is given by ?Efvf.
(c) The composite fractures at the fracture strain of the fibers.
(d) The composite fractures at the fracture strain of the matrix.
(d) The composite fractures at the fracture strain of the matrix.
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