Best metal for cyclical stresses.
Best metal for cyclical stresses.
(OP)
I have to design a pipe that will deliberately be subjected to cyclical stress, eg the pipe will have a motion similar to a skipping rope although the amplitude of vibration will be 0.1m and the pipe length will be about 30 m. The pipe will be used until it fails and then will be replaced, to keep costs down I want to use a pipe that will not fatigue and fail. The pipe will be under tension and pressure. What is the best metal or type of metal to use to minimise fatigue and fracturing. PS I'm not a metallugist so keep answers simple!





RE: Best metal for cyclical stresses.
First off, you need to know the fluid(s) the pipe will convey and pressure/temperature to select a suitable material, and optimize the ID to assure flow velocities are acceptable.
My advice to you is to obtain a copy of one of the pressure piping codes, like ASME B31.1 or 3 to understand what is involved with pipe design, in general. Even if the pipe is low pressure, you will be able to design the piping system using guidance from the pressure piping codes.
RE: Best metal for cyclical stresses.
Regards,
Cory
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: Best metal for cyclical stresses.
Chocolates,men,coffee: are somethings liked better rich!!
(noticed in a coffee shop)
RE: Best metal for cyclical stresses.
There are a wide range of possibilities here in materials and I should have probably asked what is the application since you mentioned the pipe is under pressure.
By the way, what exactly is your application? Is this for a structural purposes, to convey fluids, to build a large shock absorber, a pipe support, what....??????? You may need to consider welding spools together at 30 meters length, which factors into material selection....
RE: Best metal for cyclical stresses.
RE: Best metal for cyclical stresses.
RE: Best metal for cyclical stresses.
Dik
RE: Best metal for cyclical stresses.
RE: Best metal for cyclical stresses.