1. S. Mandayam/ECE Dept./Rowan University Project Objectives Design and develop test-platforms for performing Acoustic Emission (AE) measurements on defective pipe segments under bi-axial stress conditions Develop empirical relations between stress and AE signal parameters

2. S. Mandayam/ECE Dept./Rowan University Major Tasks Specimen fabrication Set-up for 2-D Tensile Testing Instrumentation (AE and control) and data acquisition set-up AE testing: collaboration with Physical Acoustics Corporation Signal analysis

3. S. Mandayam/ECE Dept./Rowan University Conceptual Design: Test Platform Data Acquisition Signal Conditioning Display/ User Interface Specimen Load Cell Simulated Defect Double Acting Hydraulic Ram AE Sensors

4. S. Mandayam/ECE Dept./Rowan University Current Test Platform Design Frame Load Transducer Specimen Loading Screws Specimen Clamping Bracket

5. S. Mandayam/ECE Dept./Rowan University AE Stress Testing Platform 1/24/2003

6. S. Mandayam/ECE Dept./Rowan University Specimen Fabrication Provided by Shell Oil Co. 0.5” Thick SA-516 grade 70 Steel Coupons Simulated Cracks of varying depths.08”,.16”, and.32” deep Two sets of 3 specimens each Uni-axial and Biaxial Loading simulates axial and hoop stresses of a pressurized pipeline Also machine specimens in house with saw cut defect

7. S. Mandayam/ECE Dept./Rowan University Test Parameters Uniaxial Load Test Axis-1: 20,000 lbs Axis-2: 0 lbs Biaxial Load Test Axis-1: 20,000 lbs Axis-2: 10,000 lbs Saw-cut simulated crack

8. S. Mandayam/ECE Dept./Rowan University AE Results

9. S. Mandayam/ECE Dept./Rowan University AE Results

10. S. Mandayam/ECE Dept./Rowan University AE Results

11. S. Mandayam/ECE Dept./Rowan University AE Results

12. S. Mandayam/ECE Dept./Rowan University Location View

13. S. Mandayam/ECE Dept./Rowan University Future Steps Modify test platform design Hydraulic System to reach desired load Extraneous Sound Dampening Test Shell specimens Parameterize AE signatures for 1-D and 2-D stress loading