SN Curves
SN Curves
(OP)
Hey all,
I am new to this group and look forward to being an active member.
We are currently running an fatigue FEA analysis which we need the SN curve for a particular material (thermoplastic). The vendor of the material dont have this data (SN curve). Is there any source you know of that may list SN curves of similar thermoplastics materials?
Thanks in advance.
Best Regards,
Ken
Pulse Designtech
I am new to this group and look forward to being an active member.
We are currently running an fatigue FEA analysis which we need the SN curve for a particular material (thermoplastic). The vendor of the material dont have this data (SN curve). Is there any source you know of that may list SN curves of similar thermoplastics materials?
Thanks in advance.
Best Regards,
Ken
Pulse Designtech





RE: SN Curves
Some references are
Applied Stresss Analysis of Plastics Krishnamachari Failure of Materials in Mechanical Design by Collins
or Deformation and Fracture Mechanics of Engineering Materials Hertzberg.
The field of fracture mechanics has superseded the use of SN curves in the analysis of failure mechanisms of thermoplastics so I am a little confused by the approach you are taking.
RE: SN Curves
http://www.dow.com/styron/design/guide/fatigue.htm
They show a typical SN curve for the type of material that you are interested in. If you contact this supplier, they may be able to provide you with the data that you need.
Maui
RE: SN Curves
The best source of fatigue data on thermoplastics is either directly from the resin supplier, or the following reference:
Fatigue and Tribological Properties of Plastics and Elastomers by: Plastics Design Library Staff © 1995 William Andrew Publishing/Plastics Design Library
You can obtain this reference by using the following link:
http://www.williamandrew.com/books.asp?id=88420715
RE: SN Curves
Stanier - Thanks for the info on the Fracture Mechanics direction for the Thermoplastics I will ask our team to look into this for future analysis projects. We were looking for the SN Curves as the input in using Cosmos Works for this particular analysis.
Maui / TVP - Thanks again for the links.