Manual

ManualsBrandsPASCO ManualsEquipmentAP-8214A Stress_Strain Apparatus

800-772-8700 www.pasco.com

Instruction Manual

012-13282A

Stress/Strain Apparatus

AP-8214A

*012-13282*

AP-8222 Plastic Test Coupons: 4 color-coded samples, 10 pieces per sample

• high impact polystyrene (HIPS)

• nylon 6 (15% glass fiber reinforced)

• acrylonitrile butadiene styrene (ABS)

• polypropylene (PP)

• The plastic coupons are attached to a rectangular plas-

tic rail called a ‘sprue’. Use scissors or a knife to cut the

coupon from the sprue.

Included Equipment

A. AP-8221 Stress/Strain Apparatus without Coupons

B. Thumbscrews for Rotary Motion Sensor, 2 pieces

C. Attachment for force sensor

D. Replacement hex nut, 2 pieces

E. Calibration bar

F. Tee handle plus Socket, 3/8 inch

• PASCO Experiment Setup CD-ROM and Storage Box (not shown)

Stress-Strain

platform

Lever arm

Coupon

clamps

Plunger

Pivot

Force Sensor

post

Belt

Crank

Fig. 1: Included Equipment

Lever arm

stop

Fig. 2: AP-8222 Plastic Test Coupons

Summary of content (12 pages)

PAGE 1
I n s tr u c ti o n M a nu a l 012- 13282A ® *012-13282* Stress/Strain Apparatus AP-8214A Lever arm Lever arm stop Pivot Stress-Strain platform Plunger Coupon clamps Force Sensor post Belt F F E Crank A B C D Fig. 1: Included Equipment Included Equipment A. AP-8221 Stress/Strain Apparatus without Coupons B. Thumbscrews for Rotary Motion Sensor, 2 pieces C. Attachment for force sensor D. Replacement hex nut, 2 pieces E. Calibration bar F.
PAGE 2
S tr e s s /S t r ai n A p p ar a tu s 012-13282A AP-8223 Metal Test Coupons: 5 samples, 10 pieces per sample (sample containers labeled with thickness in inches) • cold-rolled steel 0.003” • annealed steel 0.003” • aluminum 0.003” • brass (thick) 0.005” • brass (thin) 0.003” Intr oduction Fig. 3: AP-8223 Metal Test Coupons Note: The metal coupons are packaged in plastic containers to prevent bending or creasing of the coupons.
PAGE 3
Mo d el No . A P - 82 1 4A 0 1 2- 1 3 28 2 A Intr oduction Test Coupon Specifications The data below are intended as a general guide only and do not necessarily represent results that may be obtained. The units for tensile strength and modulus of elasticity are megapascals (MPa or 106 N/m2) and pounds per square inch (psi). AP-8222 Plastic Test Coupons Item HIPS Color code orange 2 nylon 6 (+ 15% glass) ABS black blue 2 polypropylene white 2 2.482 mm2 Cross-sectional area 2.
PAGE 4
S tr e s s /S t r ai n A p p ar a tu s 012-13282A E qu i p me n t S e t- u p About the Apparatus The lever arm on the Stress/Strain Apparatus is a Class III lever that transmits the applied force to the Force Sensor. The length of the lever arm from the pivot to the Force Sensor attachment is five times longer than the length of the lever arm from the pivot to the coupon clamp that is part of the lever arm.
PAGE 5
Mo d el No . A P - 82 1 4A 4. • 0 1 2- 1 3 28 2 A Plug the sensors into the interface. ScienceWorkshop interface: Connect the Force Sensor to Channel A. Connect the yellow plug of the RMS to Channel 1 and the black plug to Channel 2. E qu i p me n t S e t- u p 11 1 2 10 4 3 6 7 9 12 9 • PASPORT interface: Connect the Force Sensor and the RMS to a multi-port interface or two single-port interfaces. 8 5 1. Rotary Motion Sensor (RMS) 2. Force Sensor 3. Force Sensor attachment 4.
PAGE 6
S tr e s s /S t r ai n A p p ar a tu s 012-13282A E qu i p me n t S e t- u p Apparatus Calibration As you turn the crank during the experiment, force will be applied to the test coupon causing it to stretch. However, this applied force will also cause the apparatus platform and the Force Sensor to bend slightly. The displacement recorded by the RMS will be the combination of the coupon stretching and the rest of the apparatus bending.
PAGE 7
Mo d el No . A P - 82 1 4A • 0 1 2- 1 3 28 2 A Da ta S tu d io S e t- u p Change the name of the data run (Run #1) containing the calibration data to “Cal”.* * To rename a data run, click the run name (e.g. “Run #1”) where it appears in the Data List. Wait about 1 second then click it again. Enter the new name. A dialog box will appear. Select Yes. (If a window titled “Data Properties” appears, you didn't wait long enough after the first click; close that window and try again.) DataStudio Set-up 1.
PAGE 8
S tr e s s /S t r ai n A p p ar a tu s 012-13282A 3. Prepare the calculation for “Strain(F)”. First, measure the length of the narrow part of the test coupon. (The nominal length is 80 mm for the metal coupons and 18 mm for the plastic coupons.) In the Calculator window, select the defined function “Strain(F) = Displacement/Length”. In the Variables section, enter the Length of the narrow part of the coupon in millimeters. 4. Close the Calculator window.
PAGE 9
Mo d el No . A P - 82 1 4A 0 1 2- 1 3 28 2 A • Turn the crank clockwise. Starting just before the lever arm comes into contact with the Force sensor, turn the crank very slowly.* • When you have finished collecting data, click Stop. (If you reach the maximum force, DataStudio will stop automatically.) If the coupon breaks, it should break in the middle. If the coupon breaks near the end, it was probably twisted slightly when you mounted it, resulting in a point of higher stress where it broke. 4.
PAGE 10
S tr e s s /S t r ai n A p p ar a tu s 012-13282A No t es o n t he Da ta S tu d io S et - u p Fi l e Notes on the DataStudio Set-up File • For comparison of different materials, you can collect additional data runs with other coupons. Note that the Stress calculation applies only to coupons of the thickness that you entered in the Calculator window. It is easiest to compare coupons of the same thickness.
PAGE 11
Mo d el No . A P - 82 1 4A 0 1 2- 1 3 28 2 A Te c h ni c a l Su p po r t Technical Support For assistance with any PASCO product, contact PASCO at : Address: PASCO scientific 10101 Foothills Blvd. Roseville, CA 95747-7100 Phone: 916-786-3800 (worldwide) 800-772-8700 (U.S) Fax: (916) 786-3292 Web: www.pasco.com Email: techsupp@pasco.com For more information about the Stress-Strain Apparatus and the latest version of this instruction manual, visit the PASCO web site at www.pasco.
PAGE 12
S tr e s s /S t r ai n A p p ar a tu s 12 012-13282A Te c h ni c a l Su p po r t ®