Tensile Torsional test on a Carbon steel 1006 specimen

Tensile & Torsional test on a Carbon steel (1006) specimen

Fig: Test Specimen geometry

Fig: Torsional test mesh Fig: Tensile test mesh

Tension Test mesh parameters

1. Mesh method: Patch conforming – tetrahedrons (on complete body)
2. Two face sizings on the faces to be clamped: two coordinate systems are replicated at the respective geometric centres of the faces shown above and a sphere of influence with radius 22mm is assigned to both with an element size of 3mm

Torsion test mesh parameters (in addition to above)

1. The two faces adjacent to the centre cylindrical face are assigned a face sizing of 1.5mm
2. The central cylindrical face is assigned a face sizing with a sphere of influence having an 8mm radius and an element size of 1mm.

This simulation consists of two models of explicit dynamics – tensile and torsional loading on a Carbon steel test specimen

Tensile test Specs: One clamped cylindrical face and its base circular face are fixed; the other pair is assigned a single step axial displacement of 18mm

Torsion Test specs: The fixed support is applied to the faces same as above and a cylindrical coordinate system is introduced – a 1200⁰ displacement is assigned to the y-component

Post Processing (Tensile test)

Fig: Tension test Displacement Fig: Tension test Stress and Strain contours

Fig: Maximum temperature in Tensile test Fig: Torsion test displacement

Fig: Torsion test stress/strain Fig: Torsion test Max temperature

Parameters (all max)	Tension	Torsion
Total Deformation	18.00 mm	13.047 mm
Equivalent stress	610.15 MPa	639.94 MPa
Equivalent strain	0.303%	0.316%
Temperature	266.760C	454.480C

Conclusion

Tension test: The stress values obtained from the simulation indicate that the test specimen has entered its plastic region (permanent deformation) and has reaching the necking stage (sharp reduction in cross sectional area) while the strain values suggest that it is yet to reach its failure point; the temperature is maximum at the centre of the test specimen as indicated above.

Torsion test: The obtained values of the parameters above (stress and strain) indicate the test specimen fails at the applied displacement; the maximum stress and temperature occur at the point of immediate failure