31 research outputs found
Assessment of the ultimate compressive strength for FRP plates with geometrical imperfections
No full text
Design and analysis of DLS steel/composite thick-adhernd adhesive joints
No full textThe paper describes experimental and numerical techniques to study the structural design and behaviourof thick-adherend DLS joints that are based on steel /steel and steel/composites and epoxy adhesives, withfocus on long overlap joints. A standard fabrication method was followed to produce 60 specimens of
various dimensions and materials
Investigations on the ultimate compressive strength of composite plates with geometrical imperfections
No full textA series of studies has been performed within the MARSTRUCT Network of Excellence on Marine Structures in order to investigate the buckling response of glass fibre reinforced polymer plates. These studies include the fabrication, testing and finite element analysis of a large number of plates with initial geometric imperfections. This paper presents the validation of finite element models against a series of plate tests that were performed within this framework and parametric studies that were carried out to identify the effects of geometric imperfections on the ultimate compressive strength of composite plates with three alternative lay-up configurations
Fabrication, testing and analysis of steel/composite DLS adhesive joints
No full textThis paper describes experimental and numerical techniques to study the structural design of double lap shear joints that are based on thick-adherend steel/steel and steel/composite, with epoxy adhesive. A standard practical fabrication method was used to produce specimens of various dimensions and materials. These specimens consist of 10 mm steel inner adherend and various outer adherend materials including composite and steel of various thicknesses and overlaps. The composite is largely based on carbon fibre reinforced plastic. The specimens were tested under monotonic tensile loading and the results showed that joint strength depends largely on materials combination and overlap length. The testing also included the use of an advanced imaging system to determine failure initiation and propagation. Two-dimensional finite element analysis (FEA) stress models were applied and showed the importance of modelling the composite layers adjacent to the adhesive bondline in order to account for the critical local stresses. The FEA results also showed that overall shear stress distributions can be used to characterise joint failure. The paper presents the experimental and numerical details with key conclusions
Fabrication, Testing and Analysis of Steel/Composite DLS Adhesive Joints
No full textThis paper aims to provide a guide on the design and fabrication of thick adherend double lap shear joints (DLS), often referred to as butt connections/joints in ship structures including patch repair. The specimens consist of 10mm steel inner adherend and various outer adherend materials including 0/90 WR GFRP and 0/90 UD CFRP laminates and steel. The focus here is on CFRP/steel joint due to availability of test data. The thickness of the outer adherend varies from 3 mm to 6 mm. Shear overlaps of 25-200mm were considered. The overall objectives are (i) to assess the quality of the standard fabrication method, (ii) to determine joint strength and overlap plateau for various specimens with a range of material combinations and (iii) to understand aspects of failure and design of joint under quasi-static loading. The paper presents experimental and numerical details with key conclusions
Studies of the buckling of composite plates in compression
No full textAs part of the MARSTRUCT Network of Excellence on Marine Structures, a series of studies has been carried out into the buckling of glass fibre reinforced polymer plates with in-plane compression loading. The studies have included fabrication and testing of square, laminated panels with various thick-nesses and initial geometrical imperfections, material testing, advanced FE modelling studies and finally pa-rametric studies covering a range of slendernesses and imperfection amplitudes. The paper provides an over-view of the studies, which involved several participants in the Network
Assessment of the Ultimate Compressive Strength for FRP Plates with Geometrical Imperfections
No full text
