One dimensional modelling of failure in laminated plates by delamination buckling

Chai, Hwa Kian; Babcock, C. D.; Knauss, W. G.

doi:10.1016/0020-7683(81)90014-7

Cited by 617 publications

(244 citation statements)

References 2 publications

Supporting

Mentioning

210

Contrasting

Order By: Relevance

“…Almost all of the papers on delamination buckling deal with beams and flat plates [3][4][5][6][7][8][9][10]. The early work belongs to Chai et al [11] who characterized the delamination buckling models by the delamination thickness and the number of delaminations through the laminate thickness.…”

mentioning

confidence: 99%

Delamination buckling and postbuckling in composite cylindrical shells under external pressure

Tafreshi

2004

Thin-Walled Structures

View full text Add to dashboard Cite

Composite cylindrical shells and panels are widely used in aerospace structures. These are often subjected to defects and damage from both in-service and manufacturing events.Delamination is the most important of these defects. This paper deals with the computational modelling of delamination buckling and postbuckling of laminated composite cylindrical shells subjected to external pressure. The use of three-dimensional finite elements for predicting the delamination buckling and postbuckling of these structures is computationally expensive. Here the combined double-layer and single-layer

show abstract

mentioning

confidence: 99%

Delamination buckling and postbuckling in composite cylindrical shells under external pressure

Tafreshi

2004

Thin-Walled Structures

View full text Add to dashboard Cite

show abstract

“…Detection of delamination defects between plies is of the greatest importance for composite laminates, as they can significantly reduce the strength and performance of structures under compressive in-plane loading, eventually giving rise after bucking to global plate instability [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

An Analytical Model for Defect Depth Estimation Using Pulsed Thermography

et al. 2016

View full text Add to dashboard Cite

The use of pulsed thermography as a nondestructive evaluation tool for damage monitoring of composite materials has dramatically increased in the past decade. Typically, optical flashes are used as external heating sources, which may cause poor defect definition especially for thicker materials or multiple delaminations. SMArt thermography is a new alternative to standard pulsed thermography as it overcomes the limitations on the use of external thermal sources. Such a novel technology enables a built-in, fast and in-depth assessment of both surface and internal material defects by embedding shape memory alloy wires in traditional carbon fibre reinforced composite laminates. However, a theoretical model of thermal wave propagation for SMArt thermography, especially in the presence of internal structural defects, is needed to better interpret the observations/data measured during the experiments. The objective of this paper was to develop an analytical model for SMArt thermography to predict the depth of flaws/damage within composite materials based on experimental data. This model can also be used to predict the temperature contrast on the surface of the laminate, accounting for defect depth, size and opening, thermal properties of material and defect filler, thickness of the component, and intensity of the excitation energy. The results showed that the analytical model gives good predictions compared to experimental data. This paper is one of the first pioneering work showing the use thermography as a quantitative non-destructive tool where defect size and depth could be assessed with good accuracy.Keywords Composite materials · Pulsed thermography · Embedded shape memory alloy wires · Analytical methods · Defect depth · Thermal properties• Highlights • An analytical model for pulsed thermography is presented.• A methodology is proposed to estimate defect depth in thermography.• A quantitative method is demonstrated and limitations discussed.

show abstract

“…The phenomenon of progressive failure in laminated composite structures is yet to be understood, and as a result, reliable strategies for designing optimal laminated composite structures for desired life and strength are not yet available [1] For the past two decades analytical and numerical analysis have been carried out by many researchers [2][3][4][5][6][7][8][9][10][11][12][13][14] to analyse delaminated composite structures, considering their buckling and post-buckling behaviour. The early work belongs to Chai et al [2] who characterized the delamination buckling models by the delamination thickness and number of delaminations through the laminate thickness.…”

Section: Introductionmentioning

confidence: 99%

“…The early work belongs to Chai et al [2] who characterized the delamination buckling models by the delamination thickness and number of delaminations through the laminate thickness.…”

Section: Introductionmentioning

confidence: 99%

Global buckling behaviour and local damage propagation in composite plates with embedded delaminations

Tafreshi

Oswald

2003

International Journal of Pressure Vessels and Piping

View full text Add to dashboard Cite

Finite element models were developed to study global, local and mixed mode buckling behaviour of composite plates with embedded delaminations under compression. The global modelling results were compared with corresponding experimental results. It is shown that the numerical results for embedded delaminations agree very well with the experimental results, whereas the difference between the results was high for delaminations located at the edge of the plates. It is also shown that at lower loading levels the interaction of global and local buckling is negligible. At higher loading levels the strain energy release rate distribution and the delamination growth potential at the delamination front strongly depend on the shape of the debonded region and the local buckling mode. It was observed that the local buckling mode was highly influenced by the laminate stacking sequence. In the course of global buckling a parametric study was carried out to investigate the influence of the delamination size, shape and alignment of a series of composite plates.

show abstract

One dimensional modelling of failure in laminated plates by delamination buckling

Cited by 617 publications

References 2 publications

Delamination buckling and postbuckling in composite cylindrical shells under external pressure

Delamination buckling and postbuckling in composite cylindrical shells under external pressure

An Analytical Model for Defect Depth Estimation Using Pulsed Thermography

Global buckling behaviour and local damage propagation in composite plates with embedded delaminations

Contact Info

Product

Resources

About