STRUCTURAL CONFIGURATIONS FOR INCREASING FATIGUE LIFE AT ELEVATED TEMPERATURES.
Summary rept. 1 Mar-31 Aug 65,
GRUENZWEIG UND HARTMANN A G LUDWIGSHAFEN AM RHEIN (GERMANY F R)
Pagination or Media Count:
This report describes a survey of the results of loss factor and fatigue measurements made on heat resistant sandwich panels, applicable at temperatures up to 500 C. The aim of the investigation was to develop highly damped sandwich panels with properties comparable to those of sandwich comprising steel or aluminum skins and a plastic core material. The results are disappointing insofar as the number of materials found to be usable as dissipative core materials in this temperature range is very limited. In fact, only asbestos tissue proved to be partly suitable. The measured composite loss factors are of the order of 0.02 and the shear rigidity of the core is only of the order of 1.5 kgsq cm 21.4 lbsq in. In spite of these relatively low figures, it was found that the fatigue life of such panels, in a simple geometric configuration, under shock and sinusoidal excitation is still an order of magnitude greater than that of plain metal of the same weight. The fatigue life investigations were carried out at room temperature only and measurements at elevated temperatures are required to complete the investigation. Author
- Structural Engineering and Building Technology