2011
DOI: 10.1007/s13272-011-0028-2
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Long-term durability of CFRP foam core sandwich structures

Abstract: The work presented in this article is directed towards the application of CFRP foam core sandwich structures as primary structures in commercial aviation. With closed cell rigid foams, it is possible to produce comparatively low priced high-integral sandwich components having a complex geometry in terms of a curved and a variable lateral cut. Sandwich structures are offering a good bending stiffness and strength to weight ratio. Thus, they are suited for using in structures which are at risk to fail by bucklin… Show more

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Cited by 10 publications
(3 citation statements)
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References 13 publications
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“…Moisture content of the wet specimens, however, keeps increasing notably faster than the ambient specimens, and it seems to take much longer to reach the saturation state. One-dimensional Fickian diffusion model [29] can be used to simply estimate the amount of moisture diffused into the material over time [18,21,22]. The model gives the moisture content percentage M t of the foam at any time as where D is the diffusion coefficient of the material, M ∞ is the moisture content at equilibrium, h is the thickness of the specimen and t is time.…”
Section: Materials and Test Methodsmentioning
confidence: 99%
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“…Moisture content of the wet specimens, however, keeps increasing notably faster than the ambient specimens, and it seems to take much longer to reach the saturation state. One-dimensional Fickian diffusion model [29] can be used to simply estimate the amount of moisture diffused into the material over time [18,21,22]. The model gives the moisture content percentage M t of the foam at any time as where D is the diffusion coefficient of the material, M ∞ is the moisture content at equilibrium, h is the thickness of the specimen and t is time.…”
Section: Materials and Test Methodsmentioning
confidence: 99%
“…The size of the foam specimens was 25 Â 25 Â 17 mm 3 , which gives a cross-section area of 625 mm 2 that complies with standard ASTM: C365/C365M -11a for compression tests of sandwich core materials and ASTM C297/C297M-04 for tension tests. After cutting, the specimens were dried in an oven at 120 C for 24 h or longer to remove any aging shrinkage [22] and to reach dry condition. Dried foam specimens were then adhered to steel jigs using AF 163-2K (3M Co.) film adhesive and cured in an oven for 2 h at 120 C. A foam test specimen adhered to steel jigs is depicted in Figure 1(a).…”
Section: Materials and Specimen Manufacturingmentioning
confidence: 99%
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