Week 9 Tension and Torsion test challenge

Objective

To perform the tension and torsion test on the given specimen and to find out the total deformation, equivalent stress and temperature of the specimen.

Procedure

The given model is imported into the geometry and it is checked in spaceclaim for any irregularities. If not, the spaceclaim is closed and the model scheme is updated. The default structural steel material is taken for the specimen.

The specimen is meshed and face sizing is employed. The sphere of influence option is selected and it applied onto both the end surfaces with the radius of 22 mm and an element size of 2 mm. Another sphere of influence is employed for the middle part with a radius of 8 mm and an element size of 1 mm.

In the case of tension, one end is fixed and the other end is given a displacement load of 18 mm.

In the case of torsion, one end is fixed and the other end is given a rotational load of 1200 deg using a cylindrical coordinate system which is employed previously. The rotational load is given in 2 steps incremented in 600 degrees.

Solution

The tension and torsion loads are set, problem is solved and results are obtained.

Tension Results: Total deformation: 18.145 MPa Max

Directional Deformation: 18.114 mm Max

Equivalent stress: 1.088e5 MPa Max

Equivalent strain: 0.7802 Max

Temperature: 4532.3 degree celsius Max

Torsion: Total deformation: 10.188 mm Max

Directional Deformation: 1.7672 Max

Equivalent stress: 1.551e5 MPa Max

Equivalent strain: 1.7521 Max

Conclusion

The specimen is tested for both tension and torsion problem. The results are tabulated as below

Solution	Tension	Torsion
Total deformation, mm	18.145	10.188
Directional deformation, mm	18.114	1.7672
Equivalent stress, MPa	1.088e5	1.551e5
Equivalent strain, mm/mm	0.7802	1.7521

Compared with tension, torsion application produces more stress to the specimen. Also, twisting and chipping of materials at the area of where the model is twisted. The temperature generated while applying the tension load is about 4532 deg C.