elastic torsion of a bar under a torque

Description:

• Torsion occurs primarily on axles and drive shafts in motor vehicles and machines.
• The torsion occurring in the shaft cause cross-sections of the shaft to be pushed together around the longitudinal axis.
• When a torque is applied to a shaft the cross-section remains flat and no warpage occurs.
• In the event of minor torsion, the length and radius remain unchanged.
• The straight lines on the outer circumference of the shaft running parallel to the axis become helixes.
• Non-circular cross-sections mostly result in warpage.
• SE 110.29investigates the torsion of a bar under a torque.
• The bar is clamped into two movable support blocks by a chuck.
• The torque is generated by a circular disk, a deflection roller and a weight.
• The clamping length and torque can be varied.
• The resultant torsion is read-off at two random points on the bar by means of angle indicators.
• The fundamentals of elastic torsion are illustrated by the round bar.
• Three other bars are provided in order to investigate special cases: two thin-walled enclosed sections (a tube and a square tube) and a longitudinally slotted tube (thin-walled open section).
• All the component elements of the experiment are clearly laid-out and housed securely in a storage system.
• The complete experimental setup is arranged in the frame SE 112.

Technical Details:

Specification:

• elastic torsion of bars
• 2 movable support blocks with clamping chuck for mounting of bars, 1 fixed and 1 movable support
• 2 movable angle indicators clampable to the bar
• 4 bars: round bar with full cross-section, tube, longitudinally slotted tube, square tube
• application of load to the bar by a mass disk, a deflection roller and weights
• storage system to house the components
• experimental setup in frame SE 112

Technical Data:

4 brass bars, L=695mm:

• round bar, Ø=6mm
• tube, slotted tube Ø=6mm, wall thickness: 1mm, slot width: 0,3mm
• square tube WxH: 6mm, wall thickness: 1mm

Disk to apply the load:

• effective radius: 110mm

Angle indicator:

• measuring range: ±90°
• graduation: 1°

Weights:

• 1x 1N (hanger)
• 4x 1N
• 3x 5N

Dimensions & Weight:

• L x W x H: 1170x480x178mm (storage system)
• Weight: approx. 27kg (total)

Learning Objectives/Experiments:

• torsion of a bar
• shear modulus of elasticity and second polar moment of area
• angle of twist dependent on clamping length
• angle of twist dependent on torque
• influence of rigidity on torsion
• round bar with full cross-section
• tube
• tube, longitudinally slotted
• square tube
• calculation of angle of twist
• comparison of calculated and measured angle of twist

Scope of delivery:

• 2 support blocks with clamping chuck
• 2 angle indicators
• 4 bars
• 1 deflection roller with fixture
• 1 cable
• 1 set of weights
• 2 hexagon socket wrenches
• 1 storage system with foam inlay
• 1 set of instructional material

Features:

• elastic torsion of a bar under a torque
• round bar, tube, longitudinally slotted tube and square tube as test bars
• indication of the angle of twist at two random points on the bar

Accessories:

·         Required: SE 112 Mounting frame

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