Glassfibre: isotropic, linear elastic - brittle failure. Fails at about 1-2% elongation (depends on quality). E-modulus is 72 GPa and Poisson ratio 0.22.
Plywood properties are for sure dependent on degree of moisture, would, orientation of layers etc. Anything between 20-40 GPa in E-modulus for a quasi-isotropic laminate should be possible. Can you get testdata?
"model some parts of a structure with plywood and glassfibre" is a very loose description of your material...
My structure is a part of a bus, I am doing an impact essay in dynamic explicit. The glassfibre part is an inner curved shell touching the ceiling with 1 milimeter of thickness, the plywood part is the floor of the bus where people walk to the seats.
By the way, I need density too for the dynamic model, do u know their densities too?
Density of glass is 2.6 g/cm3. By the way it sounds from your description (1 mm ceiling) that it is not really glass fiber but a composite: plastic-glassfiber. Then you first of all need the ammount of glass fiber and type of plastic to say something about material properties.
Plywood density is about 1 g/cm3, floats if not too much phenolic resin. By the way I believe now i overestimated the E-modulus of plywood, should be more like 10-12 GPa at 23 degrees C and 50% RH. For ex birch wood is 12 GPa.
Sorry, it´s my fault, the glassfibre is a shell of 2 mm of thickness in the OUTER ceiling, in the inner ceiling there is a curved shell of plywood of 6 mm of thickness. The glassfibre curved shells are divided in 2 parts of 1.5 m and 1 m length and about 12,5 m of curvature. Both of them are about 2 m wide; they are some kind of stiffners for the ceiling main structure. I don´t know what kind of glassfiber (or plywood)is, I´ll have to choose the most suitable for my model.
hmmm. I still dont understand how you can make a shell of glassfibers without a matrix of some kind. Note that I have given FIBER DATA, not data for a plate with distributed fibers - it is not possible to have 100 volume-% fibers in a shell. If you apply my data directly it will correspond to a window glass.
Sorry, of course it is a matrix of resin and glassfiber.
I need the properties of the resin (density, Young´s modulus and Poisson´s ratio) with glassfibers, one which is suitable for my model.