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Hi, Can anyone offer advice on the heating/cooling rate use in thermal spike testing of composites, for both civil and military applications??

What are the penalties for using higher gsm fabrics and are there any publications available on the internet. Thanks

Gents, I have a PMMA screen of around 800mm x700mm and 6mm thick. If I were to scored the sheet 3mm deep of v shape grove and from one corner of the sheet to another in the form of X. If the sheet is then subjected to impulse pressure of @ 20KPa. Do you think the sheet will break into small...

Has anyone has any experience in using composite material above its Tg. If one could characterise its mechanical properties (at temperature >Tg and ignoring non linear failure behaviour), can one use them for FE analysis i.e. does the FE result applicable or appropriate?? n/b: the component...

Does anyone know any website with information on the cost of composite materials i.e fibres: glass/carbon/kevlar either in UD or fabric form, also their prepregs with different matrices (epoxy/cyanate ester) Thanks

Gents, Is it correct that if holes are to be incorporated in a composite structure, OHT or OHC strength values should be used in the analysis instead of the normal tensile or compression values? and if it is should one use hot/wet values?? Thanks Compoman