Week 9 Tension and Torsion test challenge

Tension and Torsion test on a specimen using Explicit Dynamics Module

Aim:
We need to perform the tension and torsion test on the specimen provided in the challenge.

Tension test
For the tension test, displace one end of the specimen to 18mm while keeping the other fixed. we need to find out the total deformation, equivalent stress, andtemperature of the specimen.

Torsion test

For the torsion test, we need to displace one end of the specimen to an angle of 1200 degrees. we need to find out the total deformation, equivalent stress,and temperature of the specimen.

Tension test:
Tensile testing, also known as tension testing is a fundamental material science and engineering test in which a sample is subjected to a controlled tension untilfailure. Properties that are directly-measured via a tensile test are ultimate tensile strength, breaking strength, maximum elongation, and reduction in area.
From these measurements, the following properties can also be determined:
Young's modulus
Poissons ratio
Yield strength characteristics.

Uniaxial tensile testing is the most commonly used for obtaining the mechanical characteristics of isotropic materials. Some materials use biaxial tensiletesting. The main difference between these testing machines being how the load is applied to the materials.

Torsion test:
Torsion testing is a type of mechanical testing that evaluates the properties of materials or devices while under stress from angular displacement. Torsion testingcan be split into two distinct categories: testing raw materials like metal wires or plastic tubing to determine properties such as shear strength and modulus, orfunctional testing of finished products subjected to torsions, such as screws, pharmaceutical bottles, and sheathed cables. The most common mechanicalproperties measured by torsion testing are:
Modulus of elasticity in shear
Yield shear strength
Ultimate shear strength

Modulus of rupture in shear
Ductility

Torsion tests can be performed by applying only a rotational motion or by applying both axial (tension or compression) and torsional forces. Types of torsiontesting vary from product to product but can usually be classified as failure, proof, or product operation testing.
Torsion Only: Applying only torsional loads to the test specimen.
Axial-Torsion: Applying both axial (tension or compression) and torsional forces to the test specimen.
Failure Testing: Twisting the product, component, or specimen until failure. Failure can be classified as either a physical break or a kink/defect in thespecimen.
Proof Testing: Applying a torsional load and holding this torque load for a fixed amount of time.
Operational Testing: Testing complete assemblies or products such as bottle caps, switches, dial pens, or steering columns to verify that the productperforms as expected under torsion loads.

Engineering Data Materials

Geometry:
Then we have to import into ansys, import the model, and open it in space claim so that ansys will read it and checked for any errors.

Coordinates
Different cartesian coordinates systems are defined for refining the mesh and also to apply the load at precise locations.

CASE 2 - TORSION TEST 

REQUIRED TO GENERATE CO- ORDINATE SYSTEM- CYLINRICAL- DISPLACEMENT IS PROVIDED AS BELOW

Meshing
At certain locations, the mesh should be refined so we have used the sphere of influence and element size as shown below.

However, regions of a particular surface for the specimen are meshed using face sizing with a mesh element size as required.

The mesh metric is utilized to identify the elements according to their quality using skewness. The quality of the mesh is acceptable as most of the elements liewithin a high-quality range.

 Analytical settings:
The analysis settings were used as per the requirement in the simulation.

Explicit Analysis:

Tension Test 

Both fixed and displacement support applied to the specimen

TORSION Test 

One end is fixed and displacement is provided in 1200deg as shown below

Result for the Tension test:

TENSION TEST
Total deformation:
The specimen reaches a maximum deformation of 18mm as shown below.

Equivalent stress:
The specimen has reached the Equivalent stress of 667.90 Mpa as shown below.

The temperature generated during the
Tension test:
The specimen has reached the Maximum temperature of 265.55 as shown below.

TORSION TEST
Total deformation:
The specimen reaches a maximum deformation of 19.20 mm as shown below.

Equivalent stress:
The specimen has reached the Equivalent stress of 621.90 Mpa as shown below.

The temperature generated during the
Torsion test:
The specimen has reached the Maximum temperature of 496.8 as shown below.

 CONCLUSION

From the above Table comparison, it is seen that the Total-deformation, Equivalent stress, Temperature of the body is raised in the case-2 as compared with thecase-1.