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EXTENSION - COMPRESSION

Lecture



Central stretching (compression) is called such a type of deformation, in which only a transfusional force (tensile or compressive) arises in the cross section of the beam, and all other internal forces are zero. (Fig.2.1)
CONSTRUCTION OF EPYURES OF LONGITUDINAL FORCES N
EXTENSION - COMPRESSION
Fig. 2.1
The longitudinal force is the internal force that occurs between the individual parts of an element under the action of an external vulture (central compressive or central tensile).
To determine the longitudinal force, the section method is used. Stretching is indicated by plus (+), compression by minus (-). (Fig.2.2).
According to the section method; cut, discard, replace, balance:
EXTENSION - COMPRESSION
EXTENSION - COMPRESSION
  1. The jump in the plot N is equal to the concentrated force applied in this section.
  2. In section "A" (seal) there is a reaction R A , which can be found from the formula:
EXTENSION - COMPRESSION
But it is easier to go from the free end, and then find the reaction R A in the diagram at point A: R A = P.
EXTENSION - COMPRESSION
Fig. 2.2
created: 2014-09-20
updated: 2021-03-13
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Tensile compression

Terms: Tensile compression