Structural Mechanic Lab Equipment

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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:

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

Accessory Requires:

• Shear force apparatus
• Bending Moment Apparatus
• Hangers
• Weights

Additional Information:

• Item Code: 1715

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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:

• Frame is provided with a provision to achieve different end conditions viz. hinged, roller & fixed.
• 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.

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Apparatus for Verification of Clarke’s Maxwell Reciprocal Theorem

Apparatus consist of a mild steel beam 100cm long and 1.25cm x 4mm in cross section with graduations at every 10cm along the length. It should be supported on two knife edge supports 70cm apart with a 30cm overhang on one side. Reciprocal theorem can be verified by direct measurements of the deflections of various points with the help of a dial gauge due to a load placed at the reciprocal points. A dial gauge with 25mm travel (with a magnetic base) should be supplied with the apparatus. Apparatus to be supplied should be complete with a supporting stand and a set of weights.

Experimental Capabilities: To verify Clerk’s Maxwell reciprocal theorem by means of a mild steel be

Additional Information:

• Item Code: 1700

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Elastically Coupled Beam Apparatus, Apparatus consists of a three parallel bar suspension system with elastic beam at their upper and lower ends. The upper ends of the two outer suspension rods are tied to a vertical wooden board while central suspension rod may be tied to the centre of another elastic beam supported at two outer ends only. Mild steel Apparatus to be supplied should be complete with a supporting stand and a set of weights.

Additional Information:

• Item Code: 1705

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Elastic Properties of Deflected Beam Apparatus, Apparatus consists of a mild steel beam 2.5cm x 3mm in cross section and 100cm long, pinned to two supports 70cm apart situated symmetrically. One of the ends can be fixed or given a known slope by applying a known moment at the end with the help of suspended loads. At the other end also a known moment can be applied. Vertical loads can be applied at various points along the span of the beam. A dial gauge with 25mm travel (with a magnetic base) may be supplied with the apparatus. Apparatus to be supplied should be complete with a supporting stand and a set of weights

Additional Information:

• Item Code: 1706

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Elastic Properties of Deflected Beam Apparatus:

Apparatus consists of a mild steel beam 2.5cm x 3mm in cross section and 100cm long, pinned to two supports 70cm apart situated symmetrically. One of the ends can be fixed or given a known slope by applying a known moment at the end with the help of suspended loads. At the other end also a known moment can be applied. Vertical loads can be applied at various points along the span of the beam. A dial gauge with 25mm travel (with a magnetic base) may be supplied with the apparatus. Apparatus to be supplied should be complete with a supporting stand and a set of weights

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Description:

Cables are frequently used to support loads over large spans such as cable stayed for suspension bridges, cable car systems and stadium roof. They are used extensively for permanent guys on structures such as microwave towers and derricks. They are also used for temporary guys during erection. The only force in a cable is direct tension. They are too flexible to carry any moment.
A cable is used to carry concentrated loads, uniformly distributed load along its length and uniformly distributed load along the horizontal span. It takes the shape of a polygon under concentrated loads, a catenary under uniform load along its length (such as its own weight), and a parabola under uniform load along the horizontal span.

Experiment:

• Study the Extension of each spring Balance Left & Right Both.
• Study of the effect of a point load

Technical Specification:

• One of the ends can be converted to a roller by applying a known load at the end with the help of suspended pulley system.
• Vertical loads can be applied at various points along the span of the beam.

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Curved Member Apparatus, Apparatus consists of a steel bar which is used to make the different curved members Viz. circle, semicircle with straight arm, a quadrant of a circle and quadrant of a circle with straight arm. The bottom ends of the members are fixed to the base. Under the application of load at free end, its horizontal and vertical deflection can be measured with the help of dial gauges. A dial gauge with 25mm travel (with a magnetic base) is supplied with the apparatus. Apparatus to be supplied should be complete with a supporting stand and a set of weights.

Experimental Capabilities: Apparatus is supplied complete with a supporting stand and a set of weights

Additional Information:

• Item Code: 1703

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Additional Information:

• Item Code: 1704

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• Rugged construction
• Unmatched performance
• Trouble-free operation

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• Precisely engineered
• Reliable operation
• High functionality

• Both ends pinned
• Both ends fixed
• One end pinned and other fixed
• One end fixed and other end free

Additional Information:

• Item Code: 1702

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Deflection of Truss Apparatus:

Apparatus consist of 4 panels of a PRATT steel truss, each panel being 40cm in horizontal direction and 30cm in vertical direction. Load can be applied on each panel point. All tension members should be provided with detachable springs so as to obtain appreciable deformation of the member. Direction of the diagonal members may be changed. Apparatus can be used to illustrate visually the nature of forces set up in various members of the Truss. Apparatus to be supplied should be complete with a supporting stand and a set of weights.

Experimental Capabilities:

Apparatus is supplied complete with a supporting stand and a set of weights