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 WP 960 Beam on 2 Supports: Shear Force & Bending Moment Diagrams
 Technical Description

Statics observes the effect of forces on a rigid body, ignoring any possible deformations which may occur in the process. The forces are in equilibrium. In reality, forces always produce an effect in the component, such as deformation. These effects are investigated in the science of the strength of materials. The methods applied in strength of materials serve to design components so that they cannot be deformed or destroyed by applied forces.
A simple example is a statically determinate bearing-mounted beam subjected to point loads. The reactions are determined from the conditions of equilibrium. To investigate the effect of the point loads in the beam, it is notionally split into two segments. Applying the method of sections, the internal forces and moments are plotted onto the two segments and calculated by way of conditions of equilibrium.
WP 960 includes a beam mounted on two supports. The beam is cut at one point. At that point there is a low-friction hinge with two degrees of freedom. Two force gauges determine the internal reactions to the externally applied forces at the section. The shear force is recorded and displayed directly by a force gauge. The bending moment occurring at the section is recorded by a second force gauge acting on a fixed lever arm. This force readout, divided by 10, gives the bending moment in Nm.

Adjuster nuts on the two force gauges are used to align the beam horizontally and balance out any deflection.

In evaluating the experiment it becomes clear that the shear force, as

opposed to the bending moment, is mostly negligible when designing components.
The various elements of the experiment are clearly laid-out and housed securely in a storage system. The complete test setup is arranged on a frame.
The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments
- Calculation of the reactions arising from the
static conditions of equilibrium
- Application of the method of sections to calculate
the internal forces and moments
- Calculation of the shear force diagram
- Calculation of the bending moment diagram
- Comparison of calculated and measured values for
shear force and bending moment
 Features
* Application of the method of sections to determine
internal reactions of the beam1
* Direct indication of shear force and bending moment
at a section on the beam
 Available accessories
WP 300.09 -- Laboratory Trolley
 Alternative products
WP 961 -- Beam on Two Supports: Shear Force Diagram
WP 962 -- Beam on Two Supports: Bending Moment Diagram
 Specification [1] Determination of shear force and bending moment on beam mounted on 2 supports[2] Measurement of shear force and bending moment in beam by low-friction hinge with 2 degrees of freedom[3] Position of hinge at 1/3 span[4] 2 bearing supports  [5] Loading of beam by 1 to 3 point loads[6] Force gauges to indicate shear force and determine bending moment[7] Bending moment determined by force measurement and lever arm [8] Adjuster nuts for horizontal alignment of beam[9] Steel rule to determine positions of point loads[10] Storage system to house the components Technical Data Beam- total length: 1000mm- span: 800mmMeasuring ranges- bending moment via force gauge and lever arm  lever arm: 100mm  Force gauge: -100...+100N  bending moment: -10...+10Nm- shear force: -50...+50N- steel rule: 1000mm, graduations: 1mm Set of weights- 3x 1N (hangers)- 12x 1N- 9x 5N- max. weight load per hanger: 20N Dimensions and Weight l x w x h: 1400 x 320 x 600 mmWeight: approx. 35 kg Scope of Delivery 1 experimental unit3 sets of weights 1 steel rule1 storage system 1 set of instructional material Order Details 020.96000  WP 960  Beam on 2 Supports: Shear                    Force & Bending Moment Diagrams