cyclic loading

The effect of crystal size and initial dislocation density on surface roughness evolution in FCC single crystals during the early number of cycles of mechanical cyclic loading is investigated using three dimensional discrete dislocation dynamics simulations. Crystals having size less than 2 μm show early development of surface slip localization, while larger ones show a more uniform distribution of surface steps. The surface roughness is found to increase with increasing number of loading cycles with larger crystals showing a high roughening rate compared to smaller crystals.

Dear ALL,

Does anyone here has an experience carry out  FE analysis for a part[bracket] which was deformed plastically during cyclic loading test.

I'm now working to resolve this issue when a bracket was fail to withstand the constant loading of 500N during cyclic test. It was reported fail at ~3800 cycles which was less than target.

Rgds.

Dear friends, i current doing a project work on testing fatigue life of superelastic nitinol. And since i am very new in using abaqus for testing the simulation, i seeking help from people around here to ask for method to test the work. My objective is to set a maximum elongation for 1%-6% of elongation and test for 40,000 cycle if it can work for this amount of cycle..

i Hope anyone can help me as i need to finish this project in order to graduate and i didnt get any single help from regarding this software from my side..

Hi colleague

can you help me to define a cyclic load of 1 kN (120 cycle per min ) in Abaqus?

does it diifrent to use static or dynamic analysis?

Thanks. 

Hi everybody,

I am trying to model a connection in ANSYS and analyse it under cyclic load (Earthquake Load). first of all I have done my 3D model in Auto CAD but I dont know how to transfer this to ANSYS!!!

Also I have the graph for the cyclic load which is based on number of Cycles (x-axis) and storey drift (y-axis) but I dont know how I am supposed to model this in ANSYS!!!! can anyone help me and guide me through this?! Thank you very much. 

Hi,

 I d like to ask you how could fatigue loading be modelled in cae. I know that you can set up the load as a sin function with min and max values. But where do you set-up the total nr of cycles? Is at the step part and where exactly?

And another question could anyone provide me with details of the input file for the hysteresis loop, where the stess nd strain resistance of the material drops after certain cycles..

Regards,

   Panos

My name is Georges Ayoub; I am looking for a postdoctoral research position in mechanical and material engineering in the field of the polymer science, polymer behaviour and fatigue.
I defended my PHD at the beginning of this academic year (2010/2011). I am very motivated to start a Postdoctoral position, at the end of my thesis, in an Anglo-Saxon country.

My name is Georges Ayoub; I am looking for a postdoctoral research position in mechanical and material engineering in the field of the polymer science, polymer behaviour and fatigue.
I am presently preparing my last year of PHD at Lille1 university (north France) and ill defence my thesis in September 2010. I am very motivated to start a Postdoctoral position, at the end of my thesis, in a Anglo-Saxon country.

Hi,

I am pursuing my master's in Mech. Engg. and working on Abaqus for FEA of components. In one of the analysis, 

I am required to apply cyclic loading on the component to determine the Stresses at the edges. Its a compression

cyclic loading with kinematic hardening taken into account. From the documentation for ABAQUS 6.9.1, I found that

in order to apply kinematic hardening in metals, one must take it as Combined (Isotropic + Kinematic) Hardening.

The two concerns I have about this analysis are:

Hi

All I am trying to model reinforced concrete column.I am using concrete damaged placity model.I used truss element for main reinforcement and ties .All main reinforcement and ties are embeded in concrete column.I need the following answer.

1-How ties confine the concrete column.

2-How can I apply the cyclic loading.

Please could you provide me any help in this regard.

MUHAMMAD YAQUB

PHD STUDENT

MANCHESTER UNIVERSITY