Hi - I have come across a notation for composite laminate sequence / layup that I am not used to - can anyone help? I am used to seeing for example [0,45,90]s but I have just read [0, 45, 90]so - is anyone familiar with this difference and what it means?
I am working on a project which requires a high strength and high elongation wire for which I have chosen 316 SS. The choice was based on properties given by MatWeb which shows a UTS of 689MPa and an elongation of 50% for a wire diameter of 1.6mm. My problem is that the heat treatment they...
Hi,
Does anyone know where I can source resins with a tunable refractive index, or with specific values of 1.52 and 1.78 (at Sodium D line). Ideally I would like a low viscosity thermoset but I could live with a thermoplastic if necessary.
Thanks
Hi,
Does anyone know where I could source a resin system with a tunable refractive index. I need two materials, one at 1.52 and one at 1.78. Ideally I would like an infusable thermoset system (ie low processing viscosity), but I could live with a thermoplastic if necessary.
Thanks
Hi,
Does anyone know of a good reference on-line for composite sandwich panel design. I'm particularly interested in determining I and E values for different skin thciknesses and core dimensions. I am also interested in jointing concepts for sandwich panels and would be grateful for any case...
Dear all,
Can anyone tell me if there is likely to be a problem with curing an epoxy prepreg onto a PU foam, in terms of chemical compatibility? We are having some problems achieving full cure of the prepreg and I'm not sure whether or not this is due to some kind of reaction / leaching effect -...
Hi,
I have had a query regarding the feasibility of making large areas of structural foam on board a ship, and disposing of it again (or at least significantly reducing the bulk of it). I've had a look at the possibility of PU foam as it lends itself to the manufacturing side at least - has...
Does anybody know how to measure the refractive index of a glass fibre (e-glass/s-glass etc)? I can get the range of liquids I need but I can't find any information on the technique itself.
Grateful for any help/direction
Does anyone know how to measure the refractive index of a glass fibre (e-glass/s-glass etc)? I know how to source the refractive index matching liquids in a range of tiny bottles - but what do I do with them then? (literature seems to talk about GRIM technique - but no info. available)...
Does anyone know of a good source of information on the structure of UAV's? I'm doing a review on composite usage in UAVs and can't seem to find any specific information on materials and fabrication methods. I'm particularly looking at operational/surveillance sizes (eg Phoenix), but back-pack...
Hi,
Does anyone have any information on the 'stitchability' of foam cores? I'm looking to stitch through fabric and slab core - but need to establish criteria for foam selection (probably looking at a phenolic)
Thanks
Hi,
Does anyone know of a clear / transparent structural resin system that I can cast or infuse? It needs to have a fairly low viscosity, and preferably be room temp. cure. (with the ability to post cure up the Tg)
Thanks in advance for your help
