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Overview of PASCO Material Testing
Sep 17, 2024
Lecture Notes: PASCO Scientific Material Testing Apparatus
Presenters
Chong
Justin
, Mechanical Engineering Student, California State University Sacramento
Overview of Material Testing Apparatus
PASCO Scientific's material testing apparatus
Manual crank connected to an encoder
Encoder connected to a lead screw with a carriage
Carriage allows attachment of material sample
Equipped with a force sensor for measuring material properties in compression and tension
Included Components
Material testing apparatus
Safety guards (no need for safety glasses)
Calibration test piece for software calibration
USB link for connection to a laptop
Single user license of Capstone software for data analysis
Starter kit for immediate setup
Additional Accessories
Shear accessory
Bending accessory
Flat coupon adapter
Adapters for structure kits and testing on structure beams
Materials for Testing
Nailed steel, regular steel, brass, aluminum
Two types of plastic (clear plastic with polarizing lens)
Demonstration Setup
Remove safety cover
Use brass piece from starter kit
Set up webcam for test sample filming
Hardware setup in Capstone software
USB link and webcam connection
Configure material testing unit
Switch sign for tensile test travel direction
Calculating Stress and Strain
Stress equation: Stress = Force / Cross-sectional area
Test sample diameter: 3.3 mm (converted to meters for consistency)
Test sample length: 35 mm
Enter equations into Capstone software using Calculator
Stress in SI units (Pascal) and imperial units (PSI)
Strain: Strain = ΔL / L (unitless)
Data Collection and Analysis
Record movie with synchronized data
Use Capstone to display video and graph simultaneously
Stress on one axis, strain on the other
Adjust graph view for clarity
Zero the sensor before data collection
Collect data by cranking manually
Observe elasticity, plasticity, and yield points
Playback recorded video for review
Additional Experiments
Hysteresis demonstration: explore plasticity and elasticity
Show work hardening
Closing
Thanks to Justin and audience for participation
Encourage further exploration of apparatus capabilities
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Full transcript