Modulus of Elasticity
Modulus of Elasticity
(OP)
Hi,
Two Questions;
I am preparing to do a FEA model to determine the properties of a structure in vibration (natural freq, mode shapes etc).
Q.1 Should I specify the young's modulus of the material as that of the material under static conditions OR as that under dynamic conditions?? If you could point me in the direction of any literature I would greatly appreciate it.
Q.2 Say I am modelling an RC slab using 2-d elements. I am then applying material properties to these elements. As I have a composite material (concrete and embedded steel), how is this reflected in the Youngs Moduls which I specify for the planar element. Again if you could point me in the direction of any literature it would be a great help.
Best Regards,
Flipper.
Two Questions;
I am preparing to do a FEA model to determine the properties of a structure in vibration (natural freq, mode shapes etc).
Q.1 Should I specify the young's modulus of the material as that of the material under static conditions OR as that under dynamic conditions?? If you could point me in the direction of any literature I would greatly appreciate it.
Q.2 Say I am modelling an RC slab using 2-d elements. I am then applying material properties to these elements. As I have a composite material (concrete and embedded steel), how is this reflected in the Youngs Moduls which I specify for the planar element. Again if you could point me in the direction of any literature it would be a great help.
Best Regards,
Flipper.





RE: Modulus of Elasticity
2 any decent structures texbook. basically work out the equivalent bending stiffness for a uniform material with the same average density. Do that by working out the neutral axis of the original section and plotting the strain through it.
3 I suggest you get the results checked very carefully. Dynamic analysis is easier in some ways than statics, but the questions you are asking seem rather fundamental.
Cheers
Greg Locock
I rarely exceed 1.79 x 10^12 furlongs per fortnight
RE: Modulus of Elasticity
It is OK if you will ignore steel.
RE: Modulus of Elasticity
Cheers
Greg Locock
I rarely exceed 1.79 x 10^12 furlongs per fortnight
RE: Modulus of Elasticity
RE: Modulus of Elasticity