(iii) In the case of (b) in Fig.3, the matrix breakage and the interfacial debonding have occurred in the early stage. Figure 3 Comparison of the stress-strain curve, strength and accumulation process of damages between the composites (a) without and (b) with residual stresses. Figure 4 (a): Schematic drawing of the longitudinal cracking in the unnotched specimen. (b): Modeling for simulation. (c) to (e): Simulated fracture process accompanied with (a) s e 0 200 400 600 800 1000 1200 1400 1600 0.0 0.2 0.4 0.6 0.8 1.0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Stress, c /MPa Strain, c (%) F M I Without residual stress Normlized Number of Broken Elements, N F/N F,f , N M/N M,f , NI /NI,f (b) 0 200 400 600 800 1000 0.0 0.2 0.4 0.6 0.8 1.0 0 0.2 0.4 0.6 0.8 1.0 Stress, s c /MPa Strain, ec (%) F M I With residual stress Normlized Number of Broken Elements, N F/N F,f, NM/N M,f, N I /NI ,f Longitudinal cracking (a) Fiber Matrix (b) (c) (d) (e)
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