Stress/Strain Apparatus (without sensors) - AP-8214A



This compact Stress/Strain Apparatus shows the stress and strain during the entire process of stretching and breaking a material. PASCO has scaled-down the typically expensive engineering devices so that this apparatus is able to do all the physics without the high cost of a materials testing machine.

Since the Stress/Strain Apparatus shows the entire stress versus strain curve, it is possible to measure a wide range of material properties including Young's Modulus, the yield strength, tensile strength, ductility and toughness of the material. In addition, the different curve shapes for different materials can be compared.

DataStudio software allows students to determine Young's Modulus by measuring the slope of the initial straight line (the elastic region) and to determine the toughness by integrating under the curve.

How It Works

Tension is applied to the sample by turning the knob by hand until the sample breaks. The force used to stretch the sample is measured using a Force Sensor connected to a ScienceWorkshop or PASPORT Interface. A metal lever provides a five-to-one mechanical advantage, increasing the maximum force that the sensor can read to 250 N.

The stress is calculated using DataStudio by taking the force over the cross-sectional area. No adjustment is made for any change in the cross-sectional area during stretching.

The change in length of the sample is measured using a Rotary Motion Sensor. The resolution is 0.007 mm. The strain is calculated using DataStudio by dividing the change in length by the original length.

Buying Guide

PASPORT Force Sensor
Required for use with PASPORT
PASPORT Force Sensor   PS-2104
PASPORT Rotary Motion Sensor
Rotary Motion Sensor
Required for use with ScienceWorkshop
PASPORT Rotary Motion Sensor   PS-2120A
Rotary Motion Sensor   CI-6538
Replacement Test Coupons (Full Set)
Replacement Parts
Replacement Test Coupons (Full Set)   AP-8217A

Interface Required

To use this product you need a PASCO interface. 

New to probeware or have questions about  sensors or interfaces? Contact Teacher and Technical Support.  We're here to help!

Software Required

SPARKvue software or PASCO Capstone software may be used. PASCO Capstone is available for Mac and Windows. SPARKvue is available for Mac, Windows, iOS, Android and Chromebooks.

Learn more about Bluetooth Compatibility.