Performed The Tension and Torsion Test Challenge using Ansys Workbench

Objective: Perform the tension and torsion test on the specimen provided.

Model Given:

Theory: In tensile load, fracture depends on the behavior of the materials:

1. Ductile Fracture:

a. Behave in a highly ductile manner:

- Large plastic deformation.

- Polymers and very soft metals deform this way.

b. Behave in a moderately ductile manner:

- Moderate plastic deformation

- Most metals deform this way

2. Cup and Cone Fracture:

Cup and cone fracture occurs as a stepwise process.

1. Initially, as a result of the tensile load, the material stretches and experiences plastic deformation. Beyond some point, the material will begin to neck.

2. With continuing stress the material continues to plastically deform and small openings begin to appear inside the material at the centre of the necked region. These holes are known as microvoids.

3. The microvoids grow and coalesce to form a continuous cavity within the centre of the necked region. Once the cavity in the centre of the specimen reached a certain size the sample will fail by fast fracture.

4. The fast fracture region typically occurs at 45deg to the plane of the tensile load (the angle at which the shear load is the greatest). This results in a lip around the fracture surface.

5. The fat region which resulted from the initial microvoid coalescence is typically quite rough in the appearance while the surface the shear lip is typically quite smooth.

Nature of failure in torsional load:

Material Used:

Case1: Tension Failure

Coordinate Systems for the reference of mesh:

Face Sizing:

Meshed Model:

Analysis Settings:

Fixed Support:

Displacement Load of 18mm in axial direction is given:

Solutions:

DEFORMATION

EQUIVALENT STRESS:

TEMPERATURE:

Case 2: Torsional Test

Displacement load in torsional test:

DEFORMATION

EQUIVALENT STRESS:

TEMPERATURE:

Results and Conclusion:

	Tension	Torsional
Deformation (mm)	18.004	13.24
Equivalent Stress (MPa)	629.34	644.42
Temperature in the model (Deg Cel)	266.76	455.52