Probabilistic dynamic buckling of composite shell structures

Chamis, Christos C.; Abumeri, Galib H.

doi:10.1016/j.compositesa.2004.11.018

Cited by 20 publications

(11 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this article, E 2 is estimated using the Halpin-Tsai equation (15) which increases the compression strength transverse of the fibres compared to the matrix strength.…”

Section: Fundingmentioning

confidence: 99%

Uncertainty modelling and code calibration for composite materials

Toft

Branner

Mishnaevsky

et al. 2012

Journal of Composite Materials

View full text Add to dashboard Cite

Uncertainties related to the material properties of a composite material can be determined from the micro-, meso-or macro-scales. These three starting points for a stochastic modelling of the material properties are investigated. The uncertainties are divided into physical, model, statistical and measurement uncertainties which are introduced on the different scales. Typically, these uncertainties are taken into account in the design process using characteristic values and partial safety factors specified in a design standard. The value of the partial safety factors should reflect a reasonable balance between risk of failure and cost of the structure. Consideration related to calibration of partial safety factors for composite material is described, including the probability of failure, format for the partial safety factor method and weight factors for different load cases. In a numerical example, it is demonstrated how probabilistic models for the material properties formulated on micro-scale can be calibrated using tests on the meso-and macro-scales. The results are compared to probabilistic models estimated directly from tests on the macro-scale. In another example, partial safety factors for application to wind turbine blades are calibrated for two typical lay-ups using a large number of load cases and ratios between the aerodynamic forces and the inertia forces.

show abstract

“…In this article, E 2 is estimated using the Halpin-Tsai equation (15) which increases the compression strength transverse of the fibres compared to the matrix strength.…”

Section: Fundingmentioning

confidence: 99%

Uncertainty modelling and code calibration for composite materials

Toft

Branner

Mishnaevsky

et al. 2012

Journal of Composite Materials

View full text Add to dashboard Cite

show abstract

“…The success of the aforementioned novel fabrication technique encouraged author on further investigation potential of this novel fabrication technique to implement in real aerospace world. For the past two decades, analytical and numerical methods have been carried out by many researches to analyse the crushing behaviour on the composite tube and cylindrical shells, considering their crushing response subjects to axial compression (Chamis and Abumeri, 2005;Vaziri, 2007).…”

Section: Introductionmentioning

confidence: 99%

Finite element validation on adhesive joint for composite fuselage model

Mustapha¹,

Shahrjerdi²,

Sim³

2012

J. Braz. Soc. Mech. Sci. & Eng.

View full text Add to dashboard Cite

“…where X k is the k-th sample of random variables, and g(X k ) is a function on X k such as Equations (1)- (5). ζ represents the relative difference between the mathematical expectation of a group of samples and the true mean value of corresponding random variable.…”

Section: Meso-scale Statisticsmentioning

confidence: 99%

“…Fibre reinforced composite material and structures are extensively used in diverse engineering applications such as aircraft, rockets, ships, wind turbines, buildings, etc. Due to complexity in material microstructure and manufacture process, composite structure often shows undesirably large uncertainty in its mechanical performance, such as structure deflection [1,2], load capacity [3,4], buckling behaviour [5,6] and dynamic response [7]. Therefore, structure design in stochastic or probabilistic approaches is especially important for composite structures [8].…”

Section: Introductionmentioning

confidence: 99%

Stochastic Natural Frequency Analysis of Composite Structures Based on Micro-Scale and Meso-Scale Uncertainty

Zhang

Chen

2019

Applied Sciences

View full text Add to dashboard Cite

Composite structure often shows undesirably significant uncertainty in its mechanical properties, which may consequently result into large stochastic variation of its natural frequency. This study provides stochastic natural frequency analysis of typical composite structures based on micro-scale (constituent-scale) and meso-scale (ply-scale) uncertainty. Uncertainty propagation across micro-scale and meso-scale is investigated. Response surface method (RSM) based on finite element modeling is employed to obtain approximate natural frequency of structures with complex shape or boundary conditions, and mean value and standard deviation of natural frequency of composite plate and cylindrical shell are derived. Differences in natural frequency statistics of composite plates and cylindrical shells derived by considering uncertainty at different scales are quantified and discussed. Significant statistical correlation between ply elastic properties and ply density is observed, and the statistical correlation is demonstrated to lay great influence on the statistics of structure natural frequency.

show abstract

Probabilistic dynamic buckling of composite shell structures

Cited by 20 publications

References 4 publications

Uncertainty modelling and code calibration for composite materials

Uncertainty modelling and code calibration for composite materials

Finite element validation on adhesive joint for composite fuselage model

Stochastic Natural Frequency Analysis of Composite Structures Based on Micro-Scale and Meso-Scale Uncertainty

Contact Info

Product

Resources

About