Numerical analysis of the Iosipescu specimen for composite materials

An Analysis of Rolling Shear of Spruce Wood by the Iosipescu Method

“…5 and filled points in Fig. This behavior can certainly be related to normal tensile strains, shown to occur in these zones in numerical studies on orthotropic materials (Ho et al 1993 and1994;Xing et al 1993). This behavior can certainly be related to normal tensile strains, shown to occur in these zones in numerical studies on orthotropic materials (Ho et al 1993 and1994;Xing et al 1993).…”

“…Very similar observations have been made in the testing of composite materials and these have been related to the presence of normal tensile Table 5. Brought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 6/3/15 4:16 PM stresses which have been shown to appear in this region in numerical studies (Ho et al 1993 and1994;Pierron and Vautrin 1997). These relationships were obtained by simple regression between the experimental values of m and γ b and the experimental values of the mean air-dry density ρ n.s: non significant, *: significant at the two-sided 5 % level, **: significant at the two-sided 1 % level, r 2 : coefficient of determination.…”

“…Previously, the behavior in compression has been thoroughly investigated (Dumail and Salmén 1996;Uhmeier and Salmén 1996), but little attention has been paid to the rolling shear of wood under large deformations. The use of a correction factor has been recommended to take into account the nonuniformity of the shear stress distribution along the notch axis when measuring the modulus (Broughton et al 1990;Ho et al 1993;Pierron and Vautrin 1994). Although this method has been rarely applied to wood (Bansal and Kumosa 1995), it is a well-known method, often used for testing unidirectional composite materials (Iosipescu 1967;Adams and Walrath 1987;Pierron and Vautrin 1994).…”

An experimental and numerical investigation of adhesive bonding strengths of polymer materials

“…Because large deformations were expected in the specimen response, a linear static analysis was adopted, incorporating large deformation effects, along the lines described in [10,11]. Basically, this meant that a realistic simulation of load transfer from the fixture to the Iosipescu specimen was attempted in the following manner: (a) Since the left portion of the specimen was clamped during the experiment while the right-hand portion of the specimen was allowed to move, the boundary conditions were specified by applying zero displacement constraints along the fixture-to-specimen contact region on the stationary left part of the specimen, while uniform vertical displacement of 0.5 mm was applied on the top and bottom edges of the movable right part of the specimen.…”

Effect of the Interfacial Stress Distribution on the Material Interfacial Shear Strength Measurement

“…The Iosipescu shear test was developed to measure the strength of composites and has been extensively modified before coming to its present state [12][13][14][15]. Concurrently, the short-beam shear test is also used widely to measure the shear strength of composite materials.…”