Local Interface Shear Fracture of Bonded Steel Joints with Various Bondline Thicknesses

Advances in healing-on-demand polymers and polymer composites

“…As discussed by Li [47], even for fracture toughness measurement, the fracture modes need to be clearly defined, such as Mode I, Mode II, and Mixed Mode I & II, because different fracture modes will yield different healing efficiencies. The dependence of the strength and toughness on the thickness of the healing agent layer has been studied experimentally [126,[322][323][324][325][326].…”

Dynamic delamination in laminated fiber reinforced composites: A continuum damage mechanics approach

“…Ji et al, Ji et al 2012a, Ji et al 2012b, Ji et al 2013) have shown experimentally that fracture occurs predominantly in mode-II as ߰ → ߨ/2 and in mode-I as ߰ → 0. Therefore, it is proposed that the equivalent normal and shear traction-separation laws be obtained by a straightforward interpolation of observed experimental results at ߰ =…”

“…There are a few approaches, proposed in the literature, to avoid pathological mesh dependency of the CDM results, such as non-local continua, see for more details. In the case of non-local methods, a gradient enhanced theory is required to remove the ill-posedness of the problem via integration schemes that involve characteristic lengths, see ( specimens was studied by , Ji et al 2012a. In this section, the performance of the developed delamination model is compared to the experimental data previously reported by , Ji et al 2012a, Ji et al 2012b, Ji et al 2013 (Ji et al 2013).…”

“…In the case of non-local methods, a gradient enhanced theory is required to remove the ill-posedness of the problem via integration schemes that involve characteristic lengths, see ( specimens was studied by , Ji et al 2012a. In this section, the performance of the developed delamination model is compared to the experimental data previously reported by , Ji et al 2012a, Ji et al 2012b, Ji et al 2013 (Ji et al 2013). The ENF specimens, made of the same material system, are 20mm wide and 150mm long, with a total thickness of 3 mm for each laminate and an initial crack length of 35 mm .…”

“…Results and Discussions Experimental investigations into Mode-I delamination were carried out by (de Morais et al 2002, Ji et al 2010, Ji et al 2013) using Double Cantilever Beam (DCB) specimens. EndNotched Flexure (ENF) specimens were used to investigate the mode-II interlaminar fractures by(Pereira et al 2004, Ji et al 2012a). Mode-III delamination was studied using Edge Crack Torsion (ECT) samples for carbon/epoxy laminates by(de Morais et al 2009).…”