Experimental and numerical study on GFRP-glass adhesively bonded joints (original) (raw)

Developments in GFRP reinforced bolted joints in glass

2018

The brittle material behaviour of glass means the inefficiency of contemporary mechanical connection technologies hampers the exploitation of full potential of glass for delivering energy efficient buildings. This paper presents the results of an experimental investigation of the use of adhesively bonded Glass Fibre Reinforced Polymer (GFRP) strips as a mean improving strength and ductility of bolted joints in glass. The peak load and the post-peak ductility of GFRP reinforced joints in annealed glass in double-lap tension joint configurations were experimentally investigated and compared with equivalent unstrengthened reference bolted joints in annealed glass and fully-toughened glass. The results show that the peak load of the reinforced joints in annealed glass increased up to 250%. The reinforced joints also showed a notable ductility compared to the reference annealed glass and fully-toughened glass test specimens.

Characterization of the Bond Behaviour Between Glass and GFRP

2012

In this study the bond behavior between glass fiber reinforced polymers (GFRP) and glass is studied. The GFRP is used to compensate for the brittle behavior of glass and the corresponding reduced strength under tensile stresses. In this paper, a numerical study is presented based on data collected from experimental tests conducted by the authors. The finite element method is used to model the bond between glass and GFRP pultruded laminates by means of an epoxy resin. For this purpose, a discrete crack approach based on non-linear fracture mechanics is adopted. The bond between glass and GFRP is modeled by means of zero thickness interface elements. The material properties that characterize the interface, namely the shear stiffness, the cohesion and the mode-II fracture energy, are evaluated from a parametric study performed with the objective of approximating the experimental results obtained from testing double lap joints in tension. The obtained parameters, describing the bond-sli...

The Possibilities of Glass Bond Adhesives

For several decades most of the engineering effort in glass has gone into different forms of joints. The predominant type of joint is the bolted joint in tempered glass. This type of joint has been shown to have severe limitations. Adhesive joints traditionally have had a large degree of mistrust because of the complications in manufacture, easy contamination and doubts about the moisture resistance. Three years ago DELO developed a new family of adhesives, the Glass Bond family. These are water resistant blue light/UV-a curing adhesives. It will be shown on the basis of several case studies that this type of adhesive has the potential to revolutionize glass structures.

Strength assessment of adhesive-bonded joints

Computational Materials Science, 2008

This paper deals with non-linear analyses of adhesively bonded joints under tensile lap shear loading. 3D FEM models are taken into account. The effect of the number of elements through the adhesive layer thickness is considered. Tensile true stress-true strain curves are used as models of the adherend and adhesive materials. The single lap joints are tested to validated the numerical analyses. Comparison between one-step and two-step loading is considered. In the two-step loading, a uniform displacement in the transversal direction in the one grip region is applied, followed by a tensile loading. The uniaxial load is applied gradually until the joint fails due to large plastic deformation. Non-linear analyses and laboratory tests were performed for two different adhesive thickness (0.2 and 0.03 mm). The results of laboratory tests are complied with the results of finite element simulations. The authors offer method which will be used to modelling the steel-composite bonded structure subjected to multiaxial loads.