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pratik gadve

Non linear

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Hi Pratik,

Please recreate the Type 7 interface in the model. And also check the rigids in the model. The master node in RBE3 is a slave node of another RBE2 created, which is not possible. Please correct the same.

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Hi,

You can do post processing with the animation files (A001,A002....) or the final .h3d only. I have tried with the same (trail_7_0000.rad and trail_7_0001.rad) files which shared above and h3d was generated. Ensure the engine file (_0001.rad) is also available in the same working directory and try running again.

The basic control cards required for RADIOSS solver (run time, animation files, time history, results...) is as below:

 

 

engine.PNG

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Hi,

This s because of the loading you have applied. The load is applied is applied to the master node which will be equally distributed to all the slave nodes. In your case the loading effect is nullified. I just applied the load to the lower rigid body (master node of the rigid body in the third leaf) and the model is giving results.

Ensure the load is applied correctly at the required location so that results are created.

leaf.gif

 

The model file is also attached for your reference.

leaf_model.hm

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3 minutes ago, George P Johnson said:

Hi Pratik,

It is not necessary to provide engineering strain at UTS for /MAT/LAW2. You can run with Yield stress and UTS values.

Ok George. Thank you.  I want to try another way also. Will you give me idea of how to give input stress strain curve for steel material along with its Young's modulus,rho and poisson ratio ?

 

Regards,

Pratik

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Hi Pratik,

If you want to input stress strain curve for an elasto plastic material then use /MAT/LAW36 , where you can input E, Rho and stress-strain curve.

Please note that the stress strain curve should start from the yield point of your curve, that is post yield values should be provided. I recommend you to go through the Help Menu on /MAT/LAW/36 where you will get more information on the same.

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7 minutes ago, George P Johnson said:

Hi Pratik,

If you want to input stress strain curve for an elasto plastic material then use /MAT/LAW36 , where you can input E, Rho and stress-strain curve.

Please note that the stress strain curve should start from the yield point of your curve, that is post yield values should be provided. I recommend you to go through the Help Menu on /MAT/LAW/36 where you will get more information on the same.

Ok George. Thank you for clearing all my doubts. Will consult you whenever I get stuck up in nonlinear analysis in Radioss.

 

Regards,

Pratik

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On 2/6/2018 at 2:07 PM, George P Johnson said:

Hi Pratik,

If you want to input stress strain curve for an elasto plastic material then use /MAT/LAW36 , where you can input E, Rho and stress-strain curve.

Please note that the stress strain curve should start from the yield point of your curve, that is post yield values should be provided. I recommend you to go through the Help Menu on /MAT/LAW/36 where you will get more information on the same.

Hi George,

 

I need a help again. Whatever above result I got in leaf spring analysis using Radioss solver, it is not proper. Please check animation file. I have given material inputs properly still the leaf sliding motion is not correct. Moreover the master node of RBE2 of right eye of first leaf must move along with slave nodes, isn't it? Please check with animation files. Whatever load and material values given are proper. Please do some necessary correction and let me know where I am going wrong.

 

 

 

 

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5 minutes ago, George P Johnson said:

Hi Pratik,

Can you please share the Ansys model file,so that we can recheck with the model and can ensure the model setup is correct.

 

Hi George,

 

Unfortunately I do not have ANSYS model file. I have only animation file that I have already shared with you. At right eye end of first leaf Shackle is connected. Thats why only X translational and Z axis rotational allowed. Rest all setup is correct. I guess may be helper is not pushing 2nd leaf. There might be some error in TYPE 7. Please check why why helper is not pushing upwards.

 

Regards, 

Pratik

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