Deflection Of Truss Apparatus

SPECIFICATION:

Model consists of hinged. Model will be able to demonstrate the qualitative behavior of the truss under load. As are very flexible, a compression members will easily it`s bucking i.e. It will curve of plain. The tension member however remains straight and tight. The student will therefore have a visual picture of the type of stresses i.e. Compressive or tensile that member of truss will carry under various positive of the load. In case of pinned joint truss, the student will be able to observe that angle between members at each joint undergo a small change.

INTRODUCTION:

Shear Forces occurs when two parallel forces act out of alignment with each other. For example, in a large boiler made from sections of sheet metal plate riveted together, there is an equal and opposite force exerted on the rivets, owing to the expansion and contraction of the plates. Bending Moments are rotational forces within the beam that cause bending. At any point within a beam, the Bending Moment is the sum of: each external force multiplied by the distance that is perpendicular to the direction of the force.

EXPERIMENT MANUAL:

1. To verify the Shear force a cross-section of the beam. 2. To verify the bending moment in cross–section of beam with a flexure condition.

APPARTUS SPECIFICATION:

1. Dimensions : 158 cm X 45cm X (h)60cm 2. Total Beam Length : 160 cm with flexure 3. Width of Beam : 5 cm 4. Distance of Length in between : 5 cm 5. Height of beam : 36 mm 6. No. of Hanger for weights : 3 7. No. of Spring Balance : 2 (of 10kg) 8. Total Weight of Apparatus : 13.1 kg

ACCESSORY REQUIRES:

1. Shear force apparatus 2. Bending Moment Apparatus 3. Hangers 4. Weights 5. Two Spring balances – 10kgs

DESCRIPTION:

Apparatus consist of an angle of size 1” x 1” x 1/8” or in equivalent metric units of length 80cm is tied as a cantilever beam. The beam is fixed at one end such that the rotation of 450 intervals can be given and clamped such that the principal axis of its cross-section may be inclined at any angle with the horizontal and vertical planes. Also arrangement is provided to apply vertical load at the free end of the cantilever and to measure horizontal and vertical deflection of the free end. A dial gauge with magnetic base is supplied with the apparatus.

EXPERIMENT MANUAL:

• To study the behavior of a cantilever beam under symmetrical and unsymmetrical bending. • Using a Dial gauge shown a increasing and decreasing of heights.

DESCRIPTION:

Portal Frames used for the measurement of horizontal reaction are made stiffer by using M. S. flats rectangular cross section (10mm thick and 40mm wide). All are true to shape. The ends can be other fixed of hinged as desired. The end at which horizontal reaction, is to be measured, is provided with ball bearing rollers, which easily rolls on a smooth rolling platform. At the roller end a chord is attached which is connected further to spring balance. The spring balance records the horizontal reaction, for the measurement of slope and deflection. Both the columns of the portal frame can be clamped (fixed) or pivoted (hinged) and required.

EXPERIMENT:

• To study the behavior of a portal frame under different end conditions.

TECHNICAL SPECIFICATION:

• Apparatus made up of M.S. plate of rectangular section of 3mm thick x 40cm wide. • Frame is provided with a provision to achieve different end conditions viz. hinged, roller & fixed. • The size of portal will be 40cm x 60cm. Portal may also have a provision for pulley arrangement and hook arrangement for horizontal loading at different positions. • Apparatus is to be supplied complete with a supporting stand and a set of weights • Electronic load cells, displacement cell and Electronic Control Unit (ECU) provided with apparatus. • Software for digital calculations to easily performs by students.

OPTIONAL ACCESSORIES:

• PC/Laptop Set.