End-notched flexure specimen

Carlsson, L.A. and Aksoy, A. (1991). Analysis of interleaved end-notched flexural specimen for measuring mode II fracture toughness. Int. J. Fracture 52, 66-77. 

Fig 2. Four point end notched flexure specimen (Dimensions are in mm). 

Ouyang, Z. and Li, G. (2009) Nonlinear interface shear fracture of end notched flexure specimens. International Journal of Solids and Structures, 46, 2659-2668. 

The pure mode II interlaminar fracture testing can be performed using both the end notched flexure (ENF) specimen (Russell and Street, 1984, 1985) and the end loaded split (ELS) specimen (Corleto and Bradley, 1987 Prel et al.. 1989) (Fig 3.32). 

In order to evaluate the healing efficiency for the Mode II fracture test, end-notched flexure (ENF) specimens can be used (see a schematic in Figure 8.11). Recently, Ouyang and Li [57] derived a formulation of a Mode II energy release rate for the ENF joints bonded with dissimilar materials. When the adhesively bonded joint becomes a standard ENF specimen, that is, the two adherends have identical thickness and are made of identical material, we have [57]... 

Todo M, Jar P-Y B, Takahashi K (2000) Initiation of a mode-B interlaminar crack from an insert film in the end-notched flexure composite specimen. Compos Sci Technol 60 263-272. 

The mode-II fracture parameters can be found by matching numerical and experimental results for the loads, displacements and the extent of crack propagation in three-point bending tests of adhesively bonded, end-notched flexure (ENF) specimens (see the inset of Fig. 19). These were determined to be F o = 5.4 kJ m" and f = 35 MPa [60]. Fig. 19 shows the resultant comparisons between the numerical and experimental load-displacement curves for ENF specimens fabricated from various thicknesses of aluminum adherends and a 0.25-mm-thick... 

Mode II, tapered end notched flexure (TENF) test specimen... 

The filament wound flat specimens with a pre-crack were submitted to ENF-end notched flexural tests according to the determinations defined by protocol proposed by the ESIS task group [6]. The specimen geometry is schematically represented in figure la). The... 

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