Elastic And Plastic Deformation - Young's Modulus

The ratio of the normal stress to the longitudinal strain is called Young's modulus of elasticity. If a wire of length 's' and area of cross section 'a' be stretched by a force F and if a change (Increase) of length Δs is produced , then
Normal stress =F/a, Longitudinal strain, ε= Δs /s
Modulus of elasticity, E= Normal stress/ longitudinal strain.
In the present setup the extension produced is magnified by 40 times for easy observation on a pointer scale.

Features:

• A precision pointer indicator measures the change in length Δs, i. e. the extension.
• Modular Approach.
• Sample wire different material.
• Double hook weight increase the weight in steps corresponding measure the wire extension .
• Different length of wires can be used.

Objectives:

• To investigate the elastic and plastic extension of metal wires

Technical Data:

• A Base : Cast iron, Length 200 mm, Support rod upto 8-14 mm
• Metal Wire : Copper 34 SWG, Constantan 34 SWG
• Scale : Acrylic, 1 div=0.25mm, Pointer Aluminum, length = 200 mm
• Double Hooke : Brass, Chrome Plated, Fixed double type
• Mass hook, Capacity 50g.
• Boss Head : Aluminum alloy, Type Square & round, Object size Up-to 13mm dia
• Support Rod : Mild Steel L=100cm, L=50cm, L= 25cm Dia. 10mm

Scope of Delivery:

• 1 Rod 1m
• 2 Rod, 50 cm
• 1 Rod, 35 cm
• 2 Rod, 25 cm
• 2 A’ shaped base
• 5 Bosshead
• 3 Clamp block
• 1 Cu wire
• 1 Constantan wire
• 1 Pulley with Banana Plug
• 1 Pointer Assembly
• 1 Acrylic Dual Scale Screen
• 1 Plug 4mm
• 24 Double hooked mass 50g