TAGGED: applyingload, fatigueanalysis, staticstructural


April 8, 2024 at 9:51 amJeoneBbp_participant
Hi,
I'm always confused about this topic, so that I want to ask you.Â
I want to do fatigue analysis of landing gear, and as you see there is a figure which is related to Fx,Fy and Fz loads. Although I have timeseries input, I do not know how should I static analysis. What should be my force for Fx,Fy and Fz? Should they be 1 N or not?
Sincerely,

April 10, 2024 at 12:31 pmdanielshawAnsys Employee
Which fatigue software are you using?Â Typically with time series type loading, the FE stresses are multiplied by the values in the time series file to obtain the total stresses to be used in the fatigue evaluation.Â So, commonly the FE stresses are produced from unit loads and the time series file contains the multipliers based on those unit loads.Â
Â
Â
Â

April 10, 2024 at 1:18 pmJeoneBbp_participant
I use nCode DesignLife.Â
In addition, I saw an old forum conversation and I recognised that this topic is same with my topic. I decided to apply 1N for every direction (Fx,Fy and Fz). When I do 1N analysis for Fx, nCode DesignLife will multiply (1N Stress x 4097)
/forum/forums/topic/fatigueanalysiswithtimehistoryinput/


April 10, 2024 at 1:41 pmdanielshawAnsys Employee
Yes, DesignLife will multiply the FE stress by the values in the time series file to obtain the total stresses.Â It will then rainflow count the full set of stresses to obtain the approporiate stress ranges and mean stresses to be used in the fatigue evaluation.

April 10, 2024 at 1:55 pmJeoneBbp_participant
Â
Finally, I should do static analysis with 1N load? I'm right, arenâ€™t I?
Â


April 10, 2024 at 3:18 pmdanielshawAnsys Employee
Probably. Â It depends on how the values in the time series were generated. The key is that the product of the FE stress multiplied by the time series factor is equal to the actual stress.Â That goal is most commonly obtained by using a unit load in the FE with a multipliers of the unit load stored in the time series file.

April 10, 2024 at 3:32 pmJeoneBbp_participant
Thanks a lot


 You must be logged in to reply to this topic.
 Element 30 has an undefined node number 0
 How Frictionless Contact works
 Ansys Gravity v.s. Acceleration
 How can I calculate strain at integration point?
 changing timoshenko beam theory into euler theory
 Composite Damage – Nodal Reaction Force vs. Displacement Graph
 Hertz, JKR , MG , DMT models in contact mecanics with Ansys Workbench
 ERROR: A general failure occurred during the solution process.
 Default Mesh Size
 Using UPFs in Ansys Workbench installed on Linux

341

167

165

130

99
Â© 2024 Copyright ANSYS, Inc. All rights reserved.