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A notch is a tapering or wedge- shaped, natural or artificial incision.
A tree trunk can be felled by driving a notch. The felling technique consists of creating a break notch, a drop notch and a felling cut.
The kerbholz is a wood with a series of marks (notches) for writing down a count and served as a means of payment. It is sometimes referred to as a "notch" itself.
The notch cut (also wedge cut) is a simple and old carving technique in which triangular wedges are lifted out of the material (for example from wood) in order to create a larger pattern or picture (chip carving decoration). A finer carving technique for wood is, for example, the three-cut .
Notch in the mechanics
Notches change the course of the forces acting on the inside of bodies and moments reduce the strength of components compared to non-notched components. The effect is known as the notch effect . Notches in this sense do not have to be tapered, they can also be rounded cross-section changes, bores and the like. They are often undesirable weak points, but can also serve as predetermined breaking points . If the stress increases typical for a notch are caused by a change in the material properties, such as the modulus of elasticity , this is referred to as a material-related notch.
Etymology and distribution of the word "notch"
The West Germanic verb notch comes from the Indo-European root gerbh and had the meaning of scratch or scratch. Related words of notches in other languages are kerven in Dutch and to carve in English. The Greek word gráphein (scratch and write), which can be found in " graphics ", is also related .
The word can be found in the terms Kerbtier or Kerfe for insects .
Idioms
- To have something wrong (formerly owed, owed for something today)
- Always strike in the same notch (and thereby weaken the tree or, today, the position of another person in one place, always take up the same, often unpleasant topic)
swell
- Duden - German universal dictionary, Dudenverlag, Mannheim - Leipzig - Vienna - Zurich 2003, ISBN 3-411-05505-7
- Duden - The dictionary of origin, Dudenverlag, Mannheim - Vienna - Zurich 1989, ISBN 3-411-20907-0