Experimental investigations on rolled angle sections reinforced with CFRP plates

Vlachakis, Konstantinos; Reygner, Sebastien; Tibolt, Mike; Vayas, Ioannis

doi:10.1002/cepa.1286

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…The geometry of the specimens was optimized to perform tests to determine the properties of laminates that are subjected to large deformations and the distribution of stress concentrations in the central area. The Iosipescu shear test [ 47 ] works well for isotropic materials, while the development of the method for orthotropic materials, particularly composites, is still being studied [ 48 ]. Test specimens were made from the 4 plates (using the Iosipescu test specimen model) with flat geometry, each having two symmetrical V-notches (butterfly sample) [ 47 ].…”

Section: Methodsmentioning

confidence: 99%

Multi-Criteria Evaluation of the Failure of CFRP Laminates for Frames in the Automotive Industry

et al. 2022

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Methods to predict the fracture of thin carbon fibre-reinforced polymers (CFRPs) under load are of great interest in the automotive industry. The manufacturing of composites involves a high risk of defect occurrence, and the identification of those that lead to failure increases the functional reliability and decreases costs. The performance of CFRPs can be significantly reduced in assembled structures containing stress concentrators. This paper presents a hybrid experimental–numerical method based on the Tsai–Hill criterion for behavior of thin CFRPs at complex loadings that can emphasize the threshold of stress by tracing the σ-τ envelope. Modified butterfly samples were made for shearing, traction, or shearing-with-traction tests in the weakened section by changing the angle of force application α. ANSYS simulations were used to determine the zones of maximum stress concentration. For thin CFRP samples tested with stacking sequences [0]8 and [(45/0)2]s, the main mechanical characteristics have been determined using a Dynamic Mechanical Analyzer (DMA) and ultrasound tests. A modified Arcan device (AD) was used to generate data in a biaxial stress state, leading to the characterization of the material as a whole. The generated failure envelope allows for the prediction of failure for other combinations of normal and shear stress, depending on the thickness of the laminations, the stacking order, the pretension of the fasteners, and the method used to produce the laminations. The experimental data using AD and the application of the Tsai–Hill criterion serve to the increase the safety of CFRP components.

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Section: Methodsmentioning

confidence: 99%

Multi-Criteria Evaluation of the Failure of CFRP Laminates for Frames in the Automotive Industry

et al. 2022

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“…9. More information on the tests is provided in [17]. The experimental campaign was accompanied by analytical/ numerical investigations.…”

Section: Single Angle Hybrid Membersmentioning

confidence: 99%

Telecommunication and transmission lattice towers from angle sections – the ANGELHY project

Vayas¹,

Jaspart

Bureau

et al. 2021

ce papers

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Lattice towers are extensively built in Europe and worldwide to serve telecommunication or power transmission purposes. The structural members of such towers are frequently made of equal leg angle sections that are often preferred to tubular sections due to their easy connection that results in a simple erection, a requirement set by most telecommunication or power providers. Angle sizes range from light to heavy sections with leg lengths up to 300 mm for towers with significant height. Towers, especially telecommunication ones, may need to be strengthened due to the fact that, during the design life, heavier or larger antennas resulting in a heavier wind loading may be installed. As an alternative to conventional methods, hybrid strengthening of tower angle members with carbon fiber reinforced polymers (CFRP) strips may be employed. The present paper provides an overview of ANGELHY, an RFCS‐funded research project that comes toward its end. The scope of the project is the establishment of analysis methods for lattice towers and the development of design rules for steel and hybrid angle sections, as well as built‐up members composed of angles.

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Experimental and Numerical Investigations on Closely Spaced Built-Up Angle Members

et al. 2023

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Experimental investigations on rolled angle sections reinforced with CFRP plates

Cited by 3 publications

References 2 publications

Multi-Criteria Evaluation of the Failure of CFRP Laminates for Frames in the Automotive Industry

Multi-Criteria Evaluation of the Failure of CFRP Laminates for Frames in the Automotive Industry

Telecommunication and transmission lattice towers from angle sections – the ANGELHY project

Experimental and Numerical Investigations on Closely Spaced Built-Up Angle Members

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