Experimental Investigations of Impact Damage Influence on Behavior of Thin-Walled Composite Beam Subjected to Pure Bending

Kubiak, Tomasz; Borkowski, Ł.; Wiącek, Nina

doi:10.3390/ma12071127

Cited by 11 publications

(11 citation statements)

References 29 publications

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“…Among the others, few include publications on research and numerical analyses of even unreinforced beams made of cold-formed Z [ 11 , 12 , 13 ], channel [ 14 ], or sigma [ 15 ] cross-sections. Recently, there have also been some works demonstrating bending in the case of composite beams [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Laboratory and Numerical Analysis of Steel Cold-Formed Sigma Beams Retrofitted by Bonded CFRP Tapes

et al. 2020

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In this paper, the retrofitting method of thin-walled, cold-formed sigma beams using bonded carbon fibre reinforced polymer (CFRP) tapes is proposed. The effectiveness of the presented strengthening method is investigated by the means of laboratory tests and numerical analysis conducted on simply supported, single-span beams made of 200 × 70 × 2 profile by “Blachy Pruszyński” subjected to a four-point bending scheme. Special attention is paid to the evaluation of possibility to increase the load capacity with simultaneous limitation of beams displacements by appropriate location of CFRP tapes. For this purpose, three beams were reinforced with CFRP tape placed on the inner surface of the upper flange, three with CFRP tape on the inner surface of the web, three beams with reinforcement located on the inner surface of the bottom flange, and two beams were tested as reference beams without reinforcement. CFRP tape with a width of 50 mm and a thickness of 1.2 mm was used as the reinforcement and was bonded to the beams by SikaDur®-30 adhesive. Precise strain measurement was made using electrofusion strain gauges, and displacement measurement was performed using two Aramis coupled devices in combination with the Tritop machine. Numerical models of the considered beams were developed in the Finite Element Method (FEM) program Abaqus®. Experimental and numerical analysis made it possible to obtain a very high agreement of results. Based on the conducted research, it was proved how important is the impact of the applied reinforcement (CFRP tapes) in thin-walled steel structures, with respect to the classic methods of strengthening steel building structures.

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Section: Introductionmentioning

confidence: 99%

Laboratory and Numerical Analysis of Steel Cold-Formed Sigma Beams Retrofitted by Bonded CFRP Tapes

et al. 2020

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“…The model, i.e., geometry, boundary conditions and the way of load appliance has been assumed as close as possible to those in the experimental test stand ( Figure 2). The geometry of the proposed numerical model is very close to those presented in [35].…”

Section: Numerical Modelmentioning

confidence: 61%

“…The material properties of each ply of GFRP laminate are assumed as same as they were determined in experimental tests and presented in Table 1. It should be added that in case when all layers have the fiber direction inclined to the beam's wall edges ± 45 • the nonlinear even plastic behavior [35] appear in far post-buckling range-does not have any influence on buckling load and post-buckling behavior with small deflection. Considering the above, it was decided to not to take it into the numerical model because it may disturb the analysis of influence of the layer arrangements with elements of ABD laminate stiffness matrix on buckling load, as well as post-buckling behavior and post-buckling stiffness.…”

Section: Numerical Modelmentioning

confidence: 99%

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The Influence of the Layer Arrangement on the Distortional Post-Buckling Behavior of Open Section Beams

2020

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The paper deals with the design of the stacking sequence of layers in the laminate beams with open-cross sections in order to create the desired behavior in the post-buckling range. Laminate beams with channel and lipped channel cross-sections made of glass fiber reinforced polymer (GFRP) laminate with different layer arrangements (symmetrical and nonsymmetrical) have been considered. In case of the nonsymmetrical stacking sequences, hygro-thermally curvature stable (HTCS) laminates have been taken into account. Pure bending was assumed as the type of load. In the case of beams with open cross-sections, this load type can cause the lateral-distortional buckling mode. A parametric study was performed to analyze the influence of layer arrangement on post-buckling behavior. The finite element method was used to developed numerical models and conduct simulations. Additionally, the experimental tests of the channel section beams were performed in order to validate the developed numerical models.

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“…There are many papers based on theoretical approach of thermal analysis on structures whose accomplishments are included in [ 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. Theoretical or/and experimental studies involving the pre- and post-buckling state of thin-walled structures were widely discussed in [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ]. These works concern mainly the structures built of plane plates where the phenomenon of stability was under investigation.…”

Section: Introductionmentioning

confidence: 99%

The Collapse of Titanium C-Column due to Thermal Compression

2020

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The analysis of structures under higher temperature is important for predicting the ultimate strength of a structure. Therefore, many experimental tests on samples should be undertaken to observe their behaviour and to determine ultimate load. The present work includes the study on a thin-walled C-column made of titanium compressed in an elevated temperature. The phenomenon of buckling and the post-buckling state of columns were investigated during heating or compressing in higher temperature. The tests of compression were conducted for several temperature increments by assuming the same preload to determine the load-carrying capacity. The deformations of columns until total damage were measured by using the non-contact Digital Image Correlation Aramis® System (DICAS). The numerical calculations based on the finite element method (FEM) were performed to validate the empirical results. The full characteristics of one-directional tension tests were taken into account in order for them to be constant or dependent on the temperature change. Numerical computations were conducted by employing Green–Lagrange equations for large deflections and strains. Based on our own experiment, the thermal property of titanium as a linear expansion coefficient was stable up to 300 °C in contrast to its mechanical properties. The paper shows the influence of varying material properties as a function of temperature on the behaviour and load-carrying capacity of columns. These aspects cause thin-walled columns made of titanium to endure, in elevated temperatures, significantly smaller maximum loads. Moreover, the critical buckling loads for several types of stiff supports were compared to the maximum loads of columns. The results obtained indicate that the temperature rise in columns by 175 K with regard to ambient temperature brings about the decrease of the maximum load by a half.

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Experimental Investigations of Impact Damage Influence on Behavior of Thin-Walled Composite Beam Subjected to Pure Bending

Cited by 11 publications

References 29 publications

Laboratory and Numerical Analysis of Steel Cold-Formed Sigma Beams Retrofitted by Bonded CFRP Tapes

Laboratory and Numerical Analysis of Steel Cold-Formed Sigma Beams Retrofitted by Bonded CFRP Tapes

The Influence of the Layer Arrangement on the Distortional Post-Buckling Behavior of Open Section Beams

The Collapse of Titanium C-Column due to Thermal Compression

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