Cutout shape and reinforcement design for composite C-section beams under shear load

Guo, Shijun; Morishima, Ryoko; Zhang, Xiang; Mills, Andrew R.

doi:10.1016/j.compstruct.2008.03.001

Cited by 30 publications

(10 citation statements)

References 13 publications

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“…Similarly plane windows are rectangular in shape with chamfer at the corners [1]. In plane structures, definite shapes are found as access ports for electrical and mechanical systems or for the reduction of weight [2]. Practically round cutouts are favored due to its simple geometry but there are various designs which offer more advantages over the circular shape.…”

Section: Introductionmentioning

confidence: 99%

Analysis on the Effects of Cut-Outs in Hollow Inconel 718 Gas Turbine Shafts

Prasad¹,

Nagendra²,

Adarsha³

et al. 2018

OJAppS

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Gasturbines are provided with cutouts for minimizing vibrations. Round cutouts are usually favored but there are various designs which offer more advantages over the circular shape. The objective of this work was to compare stress reduction during the induced vibration in the hollow gas turbine shafts by introducing different cutouts. Round, square and elliptical cutouts under different orientations were compared. It is observed that a square cutout at 45˚ orientation has the least stress concentration. This is due to the effective orientation of plastic strains along the principal axis.

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Section: Introductionmentioning

confidence: 99%

Analysis on the Effects of Cut-Outs in Hollow Inconel 718 Gas Turbine Shafts

Prasad¹,

Nagendra²,

Adarsha³

et al. 2018

OJAppS

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“…The effect of the plate thickness, straight-shank radius, countersunk angle, countersunk depth, plate width, and the laminate ply angles on the SCF were also investigated. The cutout shape effect on stress concentrations of composite C-section beams was studied by Guo et al., 13 which demonstrated that the cutout induced stress concentration can be reduced signiﬁcantly by appropriate cutout shape and edge reinforcements. Different patch shapes have been applied to the repair of composite panels recently.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of opening-hole shapes for rivet connection of a composite plate

Zhou

Fei

2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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The rivet joint is an important mechanical connection for hot structures made of ceramic matrix composites. The development of chemical vapor infiltration technology provides a possible application of novel rivets for these structural components. However, connectors can still be the weakest link for structural integrity due to the severe stress concentration around the rivet joint holes. The geometry parameters of the rivet hole can be key influencing factors to the structural strength. A comparative evaluation is presented to analyze the influence of opening-hole shapes on the structural stress concentration of a composite plate. The opening-hole shapes considered include circle, ellipse, and racetrack. The finite element (FE) models of specimens with the three shapes of rivet holes were constructed. The stress distributions of the specimens under tensile loading were analyzed to compare the stress concentration factor (SCF) of different opening-hole shapes. An optimal shape, i.e. racetrack-shaped, was determined based on the SCF reduction of specimen-level comparison. Then, FE models of a composite plate containing rivet holes were built to verify the outperformance of the racetrack-shaped hole. A stress concentration reduction of the plate with racetrack-shaped holes was observed compared to the one with circular holes.

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“…Various cutout edge reinforcements were investigated to reduce stress concentration and increase buckling strength [8]. This result was further investigated for the C-section beam in a previous study [9] and relevant to this current research.…”

Section: Introductionmentioning

confidence: 99%

Buckling and post-buckling of a composite C-section with cutout and flange reinforcement

Guo

Zhang

et al. 2014

Composites Part B: Engineering

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a b s t r a c tThis paper presents an investigation into the effect of cutout and flange reinforcement on the buckling and post-buckling behaviour of a carbon/epoxy composite C-section structure. The C-section having a cutout in the web is clamped at one end and subjected to a shear load at the other free end. Three different stiffener reinforcements were investigated in finite element analysis by using MSC Nastran. Buckling load was predicted by using both linear and nonlinear FE analysis. Experiments were carried out to validate the numerical model and results. Subsequently post-buckling analysis was carried out by predicting the load-deflection response of the C-section beam in nonlinear analysis. Tsai-Wu failure criterion was used to detect the first-play-failure load. The effect of circular and diamond cutout shape and effective flange reinforcements were investigated. The results show that the cutout and reinforcement have little effect on the buckling stability. However an L-shape stiffener to reinforce the C-section flange can improve the critical failure load by 20.9%.

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Cutout shape and reinforcement design for composite C-section beams under shear load

Cited by 30 publications

References 13 publications

Analysis on the Effects of Cut-Outs in Hollow Inconel 718 Gas Turbine Shafts

Analysis on the Effects of Cut-Outs in Hollow Inconel 718 Gas Turbine Shafts

Evaluation of opening-hole shapes for rivet connection of a composite plate

Buckling and post-buckling of a composite C-section with cutout and flange reinforcement

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