The split Hopkinson bar has been widely used for testing the dynamic mechanical properties of various materials. However, there are still difficulties in ensuring stress uniformity when some low wave impedance materials such as soft and brittle difficulty achieving true multi-axial multi-directional synchronous loading experiments other issues. To overcome these issues, this paper uses an electromagnetic experimental research introduces its principle implementation process. Finite element...

Bolt joints are widely used in the connection of composite material structures, but have disadvantages such as heavy weight, high cost, and low installation efficiency. In contrast, rivet simple cost-effective, can thus be adopted to reduce weight structures. To further assess feasibility “replacing bolts with rivets” this paper compares mechanical properties failure forms pure (without washer), washer, high-lock bolt through quasi-static tensile shear tests. The results show that, under...

To develop a simplified and physically sound delamination-failure criterion, this paper reports joint experimental numerical study in which out-of-plane quasi-static indentations with different indentation forces were applied to the centre of fully clamped rectangular carbon fibre-reinforced polymer (CFRP) laminates. The results show that two basic micro-delamination growth modes, are separately dominated by opening sliding microcracks, can be distinguished according fracture morphologies...

To further investigate the effects of in-plane and out-of-plane stresses on delamination initiation for composite laminates under loading, this paper reports a joint experimental numerical study, in which fully clamped rectangular CFRP were subjected to quasi-static indentations. The results show that combination shear tensile together determined delamination, whereas influences compressive stress can be neglected. For purpose understanding deformations distributions, concise analytical...

Full impact damage tolerance assessment requires the ability to properly mimic repeated response and behaviour of composite materials using quasi-static approximations. To this aim, paper reports an experimental investigation evaluating two methods for mimicking Carbon Fibre Reinforced Polymer (CFRP) laminates. In study, 8.45-J single was 225 times mimicked with 6.51-J (energy equivalent) indentations (force following recorded peak force variation. Results show that loading rate inertial...

This paper investigated the mechanical performance, progressive failure process, and modes of riveted joints, bonded hybrid joints with different adhesive layer thicknesses connecting carbon-fiber-reinforced plastic (CFRP) aluminum alloy subjected to quasi-static tensile loading. The 2D digital image correlation technique was used record deformation strain overlap area. results show that thickness had a negative effect on properties when increased from 0.2 0.8 mm, peak load energy absorption...

To improve current design approaches for composite structures, it is required to further investigate the damage interaction effects of materials under multiple out-of-plane concentrated loads. It first necessary comprehend dependence effective delamination threshold, which describes whether a grows on pre-existing in laminates. A combined experimental and numerical study presented, two sequential quasi-static indentations are applied fully clamped laminated panels, with changing distances...

Cold Expansion and Interference Fit are two well-known techniques in hole strengthening, having been widely used aviation industry. Double cold expansion is a new strengthening process which effectively combined with the techniques. A modelling method based on ABAQUS finite element proposed order to study effect of double expansion, will include reaming process, interference fit springback after that, influence edge distance ratio (EDR) stress-strain distribution has studied. Proto-LXRD...

Improvements in current design approaches require further studies of the damage interaction effects composite materials subjected to repeated out-of-plane concentrated loads. To that end, a combined simulation and experimental investigation on laminate under indentations is reported. The consist seven identical peak-force are separately applied centre laminate. results show delaminations grow all indentations, which can be interpreted as continuous degradation effective delamination growth...

The development of delamination failure criteria tends to be overly complex and involves unphysical curve fit parameters. In the pursuit develop a simplified physically sound criterion, this paper reports joint experimental numerical study, in which out-of-plane quasi-static indentations with different indentation forces were applied centre fully clamped rectangular CFRP laminates. results show that two basic micro growth modes, are separately dominated by opening sliding microcracks, can...

To further investigate the effects of in-plane and out-of-plane stresses on delamination initiation for FRP laminates under loading, this paper reports a joint experimental numerical study, in which fully clamped multidirectional CFRP composite panels were subjected to quasi-static indentations. The results show that combination shear stress tensile determined delamination, while influence compressive can be neglected. For purpose understanding underlying causes stresses, concise analytical...