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Unsymmetrical Bending Apparatus

DESCRIPTION

A bench mounting apparatus to allow students to investigate the deflections of unsymmetrical cantilevers.

The Unsymmetrical Cantilever Apparatus allows students to load a cantilever and accurately measure its deflection in any coplanar direction.

Students mount a test beam vertically in a frame. The top of the test beam fixes to a holding ring that can rotate through 360 degrees.

Students apply a horizontal load in set increments (weights included) to the bottom (free end) of the test beam. Digital indicators measure the test beam deflections in two directions, at right-angles to each other. Each indicator has a socket and additional cable for connection optional Data Acquisition System.

Students apply loads to the beam in set increments and record its displacement. Students can then rotate the beam to another position and repeat the experiment. This allows students to use the Mohr’s circle method to find the principal second moments of area of each section. To find the shear Centre of a test beam, students attach a cross-piece to the free end. The cross-piece allows students to apply loads at different positions across and outside the section of the cantilever.

Key features:
•Ideal for student use and classroom demonstrations.

•Bench-mounting apparatus

•Self-contained – needs no other parts

•Explains ‘shear centre’ and the use and construction of Mohr’s circle

•Supplied with set of different specimens u, L and solid rectangular cross section

•Connects to Versatile Data Acquisition System.

Learning outcomes

Investigations into bending of unsymmetrical cantilevers, including:

•Vertical and horizontal displacement measurement for varying angles of applied load

•Demonstration that maximum and minimum vertical deflection occurs when horizontal deflection is zero

•Use of Mohr’s circle

•Experimental and theoretical determination of the principal moments of area of test sections

•Location of shear centre of each section