number:
1467
إنجليزية
College:
department:
Degree:
Supervisor:
Dr.Imad Ahmed Hussain
year:
2004
This work is interest with the viscoelastic bodies that has been deflected by the self weighting and stored for variant storage time to finding the time required to restore these bodies to it’s original shape. Some shape has been study such as rectangular, cylindrical and grain shape, therefore our study focused on the grained shape geometry by taking a different shear relaxation modulus that has been got from the experimental tests for different types of polymer. There are many techniques to minimize the deformation to minimum values such as fixing the inner surface or rotating the body by 180o .and the
rotating technique is considered as efficient technique. Finally it is found that the time required to restore the deflected body to it’s original position is different from one types of polymer to another according
to the shear relaxation modulus which is used in it, but is the same for the same type of polymer which are used in the experi
