Support for Quasi Static analysis

Swapnil888

I have performed Quasi static analysis in Radioss solver, but couldn't able to validate results with actual one. Since I am new to radioss i took reference of E book. I choose M36 Plast Tab mat card. My material is D513 Steel.

Request to guide reply.

Rogerio Nakano_21179

Hi

I do not understand clearly you query.

you said you did quasi static analysis, So I believe you applied the loading during enough long time.

As a way to check the quasi static condition, you can compare the kinetic energy to the internal energy.

Quasi static would render small kinetic energy compared to the deformation/internal energy.

The selection of the material law would not effect the condition.

 

I hope this is helpful

Regards

Swapnil888

I am applying CLOAD of 100000N on a plate through rigids, I have completed run successfully.

But i can see only 3000N of contact force had applied on bracket(PFA Grpah for ref.)

For contact between plate and bracket i have used Type7. I need to apply fully 100KN of force on bracket.

 

Swapnil888

Swapnil888 said:

I am applying CLOAD of 100000N on a plate through rigids, I have completed run successfully.

But i can see only 3000N of contact force had applied on bracket(PFA Grpah for ref.)

For contact between plate and bracket i have used Type7. I need to apply fully 100KN of force on bracket.

 

Request to guide on above query.

Rogerio Nakano_21179

Swapnil888 said:

I am applying CLOAD of 100000N on a plate through rigids, I have completed run successfully.

But i can see only 3000N of contact force had applied on bracket(PFA Grpah for ref.)

For contact between plate and bracket i have used Type7. I need to apply fully 100KN of force on bracket.

 

I would suggest you to check on the constraints if the forces match the imposed force.

Also the force in the rbody.

Regards

 

Swapnil888

Hello sir,

Error- ELAPSED TIME=       3049.96 s  REMAINING TIME=       5984.25 s
 -- RUPTURE OF SHELL ELEMENT :    327334 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327335 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327336 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327337 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327338 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327340 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    326948 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    326952 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327293 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327296 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327297 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327300 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327301 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327302 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327305 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327306 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327309 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327310 AT TIME : 0.5066E-01
 -- RUPTURE OF SHELL ELEMENT :    327314 AT TIME : 0.5066E-01
     ANIMATION FILE: 3A012 WRITTEN
  **ERROR : TIME STEP LESS OR EQUAL ZERO

Request to support for above.

Swapnil888

Hello sir,

Run is completed successfuly but in hypergraph when i checked Rbody force it is only showing 2.25 tons, when i checked contact force it is showing 10 Tons. Please see graphs.

I have applied 10Ton(100Kn) of force but now i have confused what amount of force exactly applied on brackets

Request to reply.