Week 9 Tension and Torsion test challenge

Objective : To setup the simulation of the given tensile and torsion test to obtain the desired results.

Setting up the simulation 


To set up the simulation, first we need to import all the required material cards such as Structural Steel and STEEL 1006 for the workpiece
The below materials can be found in the General materials library.

Importing geometry :
Next we import the geometry.


Material definition :
Part1 : STEEL 1006

Then we will open Ansys explicit dynamics to set up the rest of the simulation.

Co-ordinate system : 2 additional co-ordinate systems are created to refine mesh additionally.

Mesh : Next we mesh the components.
Patch conforming method of tetrahedrons is applied on part1 centre region.



Next sizing is applied at both the ends of the specimen as shown with an element size of 3mm.



The mesh looks as shown below.

Analysis Settings : 
Next we go to analysis settings to set up the kinematics of the simulation
The analysis is run for an end time 1.0e-3 and the rest of the analysis conditions are kept as default.

  

We will analyse both the cases as shown below:
Case 1 : Tensile test
Case 2 : Torsion test

Physics of the equation : 
Case 1) In this case, a displacement of 18mm is applied and a fixed support is applied on the specimen as shown below.

Case 2) In this case, a rotation of 1200 degree is applied and a fixed support is applied on the specimen as shown below.

In case 2 the mesh in the centre of the specimen is refined further a bit to account for accurate element capture during the torsion test.

Output Parameters : The following parameters are selected for output from the simulation.

The equivalent stress, total deformation and temperature are selected as output parameters.

 


Running the simulation : 
Next we run the simulation. The simulation takes about half a minute to run as we can see from the runtime below.

Post-processing : 

Total Deformation :

Case 1)



A total deformation of 18 mm occurs in the work piece.

Case 2)

A total deformation of 13.874 mm occurs in the work piece.

Equivalent Stress : 

Case 1)

A maximum stress of 634.48 Mpa occurs in the work piece.

Case 2)

A maximum stress of 646.97 Mpa occurs in the work piece.

Temperature (user defined) :

Case 1)

A peak temperature of 278.15 degree celcius occurs in the work piece.

 Case 2)

 A peak temperature of 464.84 degree celcius occurs in the work piece.

Conclusion : 

Hence the simulations have been run as per the desired criteria and the results have been obtained.
A higher temperature occurs during the torsion test as compared to the tensile test.

 Result :  File cannot be attached. Attaching google drive link.
Tensile_test
Torsion_test