What is notch sensitivity factor q?
where q is the notch sensitivity parameter of the given material. The notch sensitivity is dependent upon the notch root radius and the materials ultimate tensile strength. The notch sensitivity was determined from a plot of notch root radius versus notch sensitivity for steels, Fig. 8 [4].
What is notch sensitivity and sensitivity factor?
By definition, Notch Sensitivity is the sensitivity of the material to the developing notches Under cyclic/fluctuating loading due to the stress concentration, geometric discontinuity, and it also depends on the hardness of the material.
What is notch sensitivity ratio?
It is the ratio of the fatigue strength of an unnotched member to the fatigue strength of the same member with a notch.
Why is notch sensitivity important?
NOTCH : Defined as a purposely introduced defect (usually U-shaped or V-shaped or circular shaped) on a planar machine component. Therefore, it causes stress concentration on its own region. Due to this, presence of Notch plays an important role in designing components in conditions of fluctuating/ fatigue loading.
What is notch sensitivity and stress concentration factor how they are calculated?
Maximum stress determination will require you to first calculate the stress concentration factor, Kt, that accounts for the reduction of cross- sectional area, and the notch sensitivity, q. q = (Kf –1)/(Kt-1). Generally, q is between 0 and 1. If q is zero, then Kf =1 and the material is not sensitive to notches at all.
What is notch in mechanical?
In mechanical engineering and materials science, a notch refers to a deliberately introduced v-shaped, u-shaped or circular defect in a planar material. In structural components, a notch causes a stress concentration which can result in the initiation and growth of fatigue cracks.
What is stress concentration factor kt?
A stress concentration factor (Kt) is a dimensionless factor that is used to quantify how concentrated the stress is in a mechanical part. It is defined as the ratio of the highest stress in the part compared to a reference stress.
What is notch sensitivity in plastics?
Notch sensitivity factors are defined for strength and for energy to fracture in such a manner that the greater the notch sensitivity factor, the greater is the effect of a notch relative to the unnotched material.
What is the notch?
Opting for a notched display is a design choice that allows manufacturers to achieve a higher screen-to-body ratio, smaller physical form-factor and offer the user more screen space by migrating the Android status bar into the screen space surrounding the notch. Credit: Samsung.
What is notch effect?
What is the notch effect and how does it affect bolts? A notch is basically each change of the cross-section of a component. It may come from drill holes, grooves or cross-sectional variations. Notches result in uneven stress distribution, leading to stress peaks – known as the notch effect.
How can I reduce my stress concentration?
4 methods of reducing stress concentration
- Include gradual transitions in the design. The most common cause of stress concentrations is an abrupt change in geometry or an abrupt shape transition.
- Use relief notches.
- Opt for several small relief notches as opposed to a single long one.
- Avoid sharp corners.