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Dimensional changes in CFRP/PMI foam core sandwich structures

: John, M.; Skala, T.; Wagner, T.; Schlimper, R.; Rinker, M.; Schäuble, R.


Applied composite materials 20 (2013), Nr.4, S.601-614
ISSN: 0929-189X
ISSN: 1573-4897
Fraunhofer IWM ()
foam core sandwich; cure residual strain; thermal strain; hygrothermal strain

A sandwich structure was observed from the beginning of life-starting at the vacuum assisted manufacturing process up to several environmental in service conditions. Strain variations due to curing process at the manufacturing, well as thermal fluctuations and humidity environments in service were detected and reviewed by their influence on the overall dimensional stability. The CFRP/PMI foam core sandwich structure was checked for an application as a primary structure in commercial aviation with its specific environmental requirements.