Unsymmetrical bending (FL 160)

symmetrical and unsymmetrical bending on a beam

CodeFL160

Description:

  • Symmetrical bending of a beam – also known as uniaxial bending – occurs when the load plane coincides with one of the main axes of the beam cross-section.
  • The beam then deflects in the direction of the load and can be described by elastic lines.
  • In unsymmetrical bending of a beam – also known as complex or biaxial bending – the main axes of the cross-section do not coincide with the direction of loading.
  • To prevent torsion, the line of application of the load must pass through the shear centre. If it does not, the beam undergoes combined bending and torsion loading.
  • FL 160is used to perform experiments relating to symmetrical and unsymmetrical bending and to combined bending and torsion loading.
  • The beam under investigation is clamped into place on one end and loaded down at the free end.
  • Two dial gauges record the horizontal and vertical deformation of the beam.
  • The unit includes three beams with different cross-sectional profiles: I, L and U.
  • The beam can be clamped with freedom to rotate in any direction.
  • This enables investigation of loading along the main axis or of the general load case.
  • An angle scale at the clamping point indicates the angular position of the beam.
  • It is possible to adjust the load application point eccentrically, so that purely unsymmetrical bending or combined bending and torsion loading is investigated.
  • The various elements of the experiment are clearly laid-out and housed securely in a storage system.

Technical Details:

Specifications:

  • experimental unit for general and unsymmetrical bending of straight beams
  • 3 beams: I, L and U profiles
  • clamping flange of beam can be clamped in the pillar free to rotate in any direction
  • clamping flange with angle scale to indicate the angular position of the beam
  • eccentricity of load application points adjustable
  • 2 dial gauges with bracket to record the horizontal and vertical deformation of the beam under load
  • storage system to house the components

Technical Data:

  • Aluminium beam
    • deformed length: 500mm
  • Eccentricity of load application point: 0…25mm
  • Dial gauges:
    • 0…10mm, graduation: 0,01mm
  • Angle scale:
    • 0…360°, graduation: 1°
  • Weights:
    • 1x 2,5N (hanger)
    • 1x 2,5N
    • 3x 5N

Dimensions & Weight:

  • L x W x H: 700x350x400mm
  • Weight: approx. 25kg
  • L x W x H: 720x480x178mm (storage system)

Learning Objectives/Experiments:

  • product moment of inertia (Iyz) and axial second moment of area (Iy, Iz)
  • Bernoulli hypothesis
  • symmetrical bending on a beam (uniaxial)
  • with I-profile
  • with L-profile
  • with U-profile
  • unsymmetrical bending (complex) on a beam with an L-profile
  • calculation of the neutral fibres
  • combined bending and torsion loading by way of eccentric force application
  • determination of the shear centre on a beam with a U-profile
  • familiarisation with shear flow (shear forces in a cross-section)
  • comparison of calculated and measured values

Scope of delivery:

  • 1 experimental unit
  • 3 beams
  • 2 dial gauges with bracket
  • 1 set of weights
  • 1 spirit level
  • 1 hexagon socket wrench
  • 1 storage system with foam inlay
  • 1 set of instructional material

Features:

  • symmetrical and unsymmetrical cross-sectional profiles: I, L and U
  • combined bending and torsion loading by way of eccentric force application

Accessories:

 

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.