[PDF] Top 20 Fatigue crack growth in thin notched woven glass composites under tensile loading. Part II: modelling

... Under static tensile loading in the fibres direction, the stress– strain relationship of the chosen glass woven ply exhibits a change of slope usually called ‘‘knee-point’’ [9] ... Voir le document complet

... damages in woven plies also oc- cur under fatigue tensile loads [11] ...degradation in woven plies loaded in tension along the fibre direction in static and ... Voir le document complet

... identify crack tip. As the tow width measures 0.5 mm (Fig. 3), the crack growth becomes steady when around three or four tows are ...dispersion in crack growth results could also ... Voir le document complet

... of woven glass plies changes with the increase in cycles [4,6,12,13] ...The fatigue process of the composite is usually found to have three stages: (1) rapid modulus decay with cycles (2) ... Voir le document complet

... the crack propagation test ...the crack initiation duration does not vary as much as the one corresponding to 30 mm width specimens, the crack growth rates are of the same order ( Table 1 ... Voir le document complet

... the crack growth in fatigue, the crack growth rate is deduced and plotted versus crack growth for each sample ( ...). In the beginning of the crack ... Voir le document complet

... the modelling of post-impact damage propagation in thin carbon/epoxy and glass/epoxy hybrid woven composite laminates loaded in fatigue ...The modelling is based on ... Voir le document complet

... slowly in the transverse direction of the loading and suddenly speeds up just before the final failure of the ...presented in this paper aims at completing these studies. In- deed, a special ... Voir le document complet

... Ultrasonic fatigue; Plate steel fatigue; Fatigue resistance; Fatigue crack ...atigue in high and very high cycle regime has been studied by Bathias et ...Advances in ... Voir le document complet

... used in this study was the Hexply Ò M21 resin and T700 Carbon fiber unidirectional prepreg supplied by Hexcel Ó ...cured in a thermal ...starter crack ( ...mm crack extension before ... Voir le document complet

... acoustic fatigue spectra with low amplitude loads at high frequency range but also buffeting or flutter type fatigue with high loads at lower frequency range [1,2] ...structures under damage ... Voir le document complet

... progress in opposite directions as shown figure 2. In the case of reinforced polymers thermal response is ...occurs in a zone where the thermal evolution is marked by a blow-up like behaviour that ... Voir le document complet

... Secondary cracks initiate at the tips of the flaws and propagate in the coplanar direction of the flaw or horizontal (quasi-coplanar) direction. Six types of coalesc[r] ... Voir le document complet

... response under cyclic uni-axial loading ...proposed in [18] to achieve structural ...observed under cyclic ...cyclic loading are sparse due to control and repeatability ...addressed ... Voir le document complet

... properties in the direction of the fibers, but are weaker in the transverse ...results in poorer mechanical properties than unidirectional ...a thin laminate that combines good mechanical ... Voir le document complet

... point of intersection and intra-tows crackings initiate. These two types of matrix damaging propagate at ±45 ◦ but the intra-tows crackings propaga- tion is much slower. Finally, the splittings reach the edges of the ... Voir le document complet

... one crack gage on one side of the sample was ...tested under air gives an idea of the uniformity of crack ...2 in the number of cycles to create a 0.1 mm surface crack could be observed ... Voir le document complet

... monotonic, loading-unloading, and fatigue tensile ...illustrated. Fatigue tests are performed at two dif- ferent frequencies and a slight improvement of the fatigue strength is observed ... Voir le document complet

... with woven composite skins and a polyurethane foam core are ...the woven composite laminate skin are varied. The woven skin is modeled using a semi-continuous approach, described in the first ... Voir le document complet

... time. In general, the load/time curve could be decomposed in three stages based on cumulative AE ...hits. In the linear deformation part, some emissions have been ...observed. In their ... Voir le document complet