Why is stress concentration very serious in brittle materials than ductile materials subjected to static load?

Stress concentration has negligible effect on the ductile materials subjected to static loads. Stress concentration has more severe effect on the brittle materials due to their inability to plastically deform.

Is concentration in cyclic loading is more serious in?

In cyclic loading, stress concentration is more serious in. brittle as well as ductile materials.

How do ductile and brittle materials differ in their response to tensile loads when a stress concentration is present?

Brittle materials (ceramics, concrete, untempered steel) are stronger (higher tensile strength -yield point and u.t.s) and harder than ductile, as they do not undergo significant plastic elongation / deformation and fail by breaking of the bonds between atoms, which requires a tensile stress along the bond.

What is the correct statement stress concentration in cyclic loading is?

Stress cocentration in static loading is less serious in dictile material But it is serious for both ductile as well as brittle material in case of cyclic loading. Stress concentration factor is used in brittle material for both static loading as well as cyclic loading.

What is stress concentration What is the effect of stress concentration on the ductile and brittle components?

For ductile materials, large loads can cause localised plastic deformation or yielding that will typically occur first at a stress concentration allowing a redistribution of stress and enabling the component to continue to carry load. Brittle materials will typically fail at the stress concentration.

Can you ignore stress concentrations in brittle materials?

Stress risers in brittle materials are not ignored, whether loading is dynamic or static, nor are stress risers ignored in ductile materials under dynamic loading.

Where do stress concentrations occur?

Stress concentrations occur when there are irregularities in the geometry or material of a structural component that cause an interruption to the flow of stress. This arises from such details as holes, grooves, notches and fillets. Stress concentrations may also occur from accidental damage such as nicks and scratches.

Which of the following reduces the stress concentration?

8. Which of the following reduces the stress concentration? Explanation: All the mentioned options reduce the sharp bending of a force flow line.

Why is ductile fracture more preferred over a brittle fracture in the applications of material?

There are two types of fracture: brittle fracture and ductile fracture. Brittle fracture involves crack growth with little or no ductile deformation of the material around the crack tip. As a result, ductile fracture is the preferred failure mode for damage-tolerant materials.

Which of the following is are the causes of stress concentration?

Is concentration factor is defined as the ratio of?

maximum stress to the endurance limit.

Why is the concentration of stress concentration in ductile material always serious?

Stress concentration in a ductile material is always serious because the ductility of the material is not effective in relieving the concentration of stress caused by cracks, flaws, surface roughness or any sharp discontinuity in the geometric form of the member.

Why do brittle materials react more seriously to cyclic loading?

Brittle materials react more seriously to cyclic loading because of the property of Brittle materials to show no sign of fracture until thw actual fracture occurs. Whereas in ductile materials, significant changes in terms of size and shape can be observed when it is loaded.

Why is it so difficult to design against cyclic loading?

What is difficult to design against is the fact that under cyclic loading, failure can occur significantly below the tensile or yield stress σy of the material. After a certain amount of plastic deformation, a neck forms in the tensile test specimen, the force for further deformation decreases and, finally, the piece breaks.

Why are stress concentration effects neglected in mechanical design calculations?

As a result of this, for ductile materials, when the stress is applied gradually and the stress is steady (not changing too much), stress concentration effects are neglected (K=1) in mechanical design calculations.