What do you mean by tensile stress?

Tensile stress (σ) is the resistance of an object to a force that could tear it apart. Tensile stress may also be known as normal stress or tension. When an applied stress is less than the material’s tensile strength, the material returns completely or partially to its original shape and size.

What is the plane of maximum shear stress of a 45 degree fillet welded transverse load?

Parallel fillet weld and transverse fillet weld both have the plane in which maximum shear stress occurs at 45′ to the leg dimension. Explanation: Transverse fillet weld has that plane inclined at 67.5 .

When subjected to torsional loading a ductile specimen breaks along a plane of maximum tensile force True or false?

When subjected to torsion, a ductile specimen breaks along a plane of maximum shear, i.e., a plane perpendicular to the shaft axis. When subjected to torsion, a brittle specimen breaks along planes perpendicular to the direction in which tension is a maximum, i.e., along surfaces at 45o to the shaft axis.

Why do brittle materials fail in torsion?

And brittle materials materials are weaker in tension than in shear. From this they concluded that when subjected to torsion a circular shaft made of ductile material breaks along a plane perpendicular to it’s longitudinal axis and the brittle material break along surfaces forming angle 45° with the longitudinal axis.

What is a tensile test?

Tensile tests are the most important way to evaluate the strength of a material. They consist in pulling a properly shaped specimen while measuring the deformation rate (with an extensometer on the reduced section of the test piece) and the force.

Why don’t materials with high tensile strength fail suddenly?

Because it doesn’t happen. (a) brittle materials – these are materials that do not have plastic deformation, their stress-strength curve has little or no deformation (see the second image); once they reach their maximum tensile strength they fail catastrophically (which means abruptly, without signals of their being close to fail).

What determines the elastic and plastic response of a tensile test?

Whenever you are pulling a specimen during a tensile test mechanical stresses will generate inside the material. How these stresses distribute inside the material and how the material reacts to these stresses will determine both the elastic and the plastic response of the component.

Is elongation in the tensile test a geometry-dependent quantity?

The measured elongation of the specimen in the tensile test is also still a geometry-dependent quantity. For example a steel specimen may be considerably greater elongated than a wooden specimen despite the same force, provided that the steel specimen is considerably longer than the wooden sample (see blue curve).