Lab #1: Poisson’s Ratio Determine Poisson’s Ratio Determine Elastic Modulus ASTM Standard E132

Principle

Equations

Plotting Strains

Volume Change

Volume Change in Metals

Strain Gage

Testing Equipment Universal Testing Machine (UTM) Tension, Compression and Flexure Monotonic Static Tension Test Single direction, Load increased slowly Crosshead Motion Motor-driven Screw Hydraulically-driven Crosshead

Testing Methods Displacement Control Load Control Strain Control Open loop, Most Common Load Control Close Loop Feedback, Expensive Strain Control

Collecting Data

Perform the Experiment Please be careful in Load Control The piston can move wildly at high speeds if The specimen is not properly mounted Specially tuned parameters are not loaded

Computing Stress = F/A0 Note $C$4 Area = Width * Thickness Stress = Load / Area

Computing Elastic Modulus Select data points by clicking on any and then Right-click and choose “Add Trendline”

Computing Poisson’s Ratio Select Transverse Strain Line, and Right Click, and choose “Format Data Series”

Material Properties Table