Nonstandard tests are necessary for analyses and verification of new developed structural and technological solutions with application of composite materials. One of the most critical primary structural parts of a typical aerospace structure is T-joint. This structural element is loaded mainly in shear, bending, peel and tension. The paper is focused on the shear loading simulations. The aim of...

The use of composite materials offshore has increased over the last years. Long term performance of a component is an important consideration for users and authorities when evaluating a composite solution. Long term data of composites are widely available for many material combinations. Data in sea water environment are more difficult to find. However, most of the available long-term data is re...

Adequate surface preparation of composite parts for adhesive bonding by use of peel plies is highly desirable, yet it remains necessary to test each combination of composite resin system, peel ply, and adhesive for successful adhesion. Furthermore, failure in adhesion, as opposed to interlaminar or cohesive failure, is usually unacceptable for any application. The Rapid Adhesion Test (“RAT”) wa...

The present study concerns experimental and fin ite element analysis of carbon epoxy and carbon epoxy carbon nanotube composites to estimate interlaminar shear strength. Mechanical properties such as elastic ratios, thickness are varied for double notched specimen and the corresponding deflections and interlaminar shear strengths are estimated by ANSYS. From simple ru le of mixtures, equivalent...

The interlaminar toughening of a carbon fibre reinforced composite by interleaving a thin layer (~20 microns) of poly(hydroxyether of bisphenol A) (phenoxy) nanofibres was explored in this work. Nanofibres, free of defect and averaging several hundred nanometres, were produced by electrospinning directly onto a pre-impregnated carbon fibre material (Toray G83C) at various concentrations between...

In this work, modified silicone tie-paints were prepared in a simple way for securing adhesion between the epoxy anticorrosive primer and fouling release coating. Hydroxy-terminated polydimethylsiloxane (PDMS) mixture containing fillers accessory ingredient was as base component. N-(2-Aminoethyl)-3-aminopropyltrimethoxysilane (DAMO) mechanically mixed with other functional additives curing ATR-...

Many arthropods and small vertebrates use adhesive pads for climbing. These biological adhesives have to meet conflicting demands: attachment must be strong and reliable, yet detachment should be fast and effortless. Climbing animals can rapidly and reversibly control their pads' adhesive strength by shear forces, but the mechanisms underlying this coupling have remained unclear. Here, we show ...

Electrophoretic process was applied to the deposition of carbon nanotubes on the surface of carbon fabrics in order to enhance the properties of CNT/carbon fabric hybrid composites. Carbon fabrics were modified by two methods: Cu deposition by cathodic method and Cu coating by thermal vaporization method. CNTs were modified by PEI and oxidation treatment. The effects of carbon fabric and CNTs m...