Torsion in plastic material
Torsion in plastic material
(OP)
I have a round shaft that will be made out of plastic material and cannot find a consistent property to use for determination of material. For example, my part will have a max shear stress of 6,800 psi and I am looking at a nylon material that shows a break tensile of 16,000 psi. Any input would be greatly appreciated. Thanks.





RE: Torsion in plastic material
Long-term properties are very critical to parts subjected to continuous or repeated stress.
Much too long to reply as - Google "creep in plastics" will start you on a very long and sometimes pointless "yellow brick road".
H
(sorry for short and seemingly curt reply, but the answer you are after is very long, and very complex, and life is much too short...)
www.tynevalleyplastics.co.uk
RE: Torsion in plastic material
H
www.tynevalleyplastics.co.uk
RE: Torsion in plastic material
RE: Torsion in plastic material
RE: Torsion in plastic material
If your part has a weld line*, for instance, you can derate the specification by at least 50% for ideal moulding conditions.
* btw, where is this "tube" gated?
Cheers
Harry
www.tynevalleyplastics.co.uk