Numerical study on thermal buckling of CFRP–Al honeycomb sandwich composites based on homogenization–localization analysis

Inserts are used to transfer localized loads to structures made of sandwich composites. Stress concentrations near inserts are known to cause failures in sandwich panels. Experimental insert pull-out tests show that the load to failure can vary by 20% between batches of sandwich panels. Clearly, uncertainties in the mechanical properties of core and adhesive potting materials have to be accounted for in the optimal design of inserts in sandwich composites. In this paper, we use an one-dimensional computational model of an insert in a homogenized honeycomb sandwich panel to explore the utility of reliability methods in design. We show that the first-order reliability method (FORM) produces accurate estimates of loads that lead to low failure probabilities. We also observe that FORM is sensitive to the failure criteria and may not converge if the failure surface is not smooth and convex.

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Vibration analysis of foam filled honeycomb sandwich panel – numerical study

Australian Journal of Mechanical Engineering ◽

10.1080/14484846.2017.1338325 ◽

2017 ◽

Vol 17 (3) ◽

pp. 191-198 ◽

Cited By ~ 9

Author(s):

Hozhabr Mozafari ◽

Sara Najafian

Keyword(s):

Vibration Analysis ◽

Sandwich Panel ◽

Numerical Study ◽

Honeycomb Sandwich ◽

Foam Filled

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Study on Ballistic Energy Absorption of Laminated and Sandwich Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.306-308.739 ◽

2006 ◽

Vol 306-308 ◽

pp. 739-744 ◽

Cited By ~ 1

Author(s):

Xiao Dong Cui ◽

Tao Zeng ◽

Dai Ning Fang

Keyword(s):

Energy Absorption ◽

Impact Response ◽

Sandwich Composite ◽

Sandwich Composites ◽

Ballistic Resistance ◽

Honeycomb Sandwich ◽

Honeycomb Sandwich Composite ◽

Improved Model ◽

Energy Absorbing ◽

The Impact

The impact response and energy absorbing characteristics of laminated, foam sandwich and honeycomb sandwich composites under ballistic impact have been studied in this investigation. An improved model is proposed in this paper to predict the ballistic property of the laminated composites. In this model, the material structures related to fiber lamination angles are designed in terms of their anti-impacting energy absorption capability. The ballistic limit speed and energy absorption per unit thickness of the three composites under different conditions are calculated. It is shown that honeycomb sandwich composite has the best ballistic resistance capability and energy absorption property among the three composites.

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