Development%20of%20an%20Acoustic%20Emission%20Test%20Platform%20with%20a%20Biaxial%20Stress%20Loading%20System

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Development of an Acoustic Emission Test Platform
with a Biaxial Stress Loading System

• Joseph Oagaro, Shreekanth Mandayam, John L.
  Schmalzel and Ronnie K. Miller

Electrical Computer Engineering 201 Mullica
Hill Road Glassboro, NJ 08028 (856)
256-5333 http//engineering.rowan.edu/
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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

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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

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Conceptual Design Test Platform
AE Sensors
Specimen
Load Cell
Simulated Defect
Double Acting Hydraulic Ram
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Test Station Design
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AE Test Station
1/24/2003
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Specimen Fabrication

• Specimens received from Shell Oil
• Also have in-house ..

Rowan Waterjet Machining Center
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Collaboration with PAC

• Rowan personnel were trained on AE system at PAC
  on August 22, 2002
• 4-Channel AE system was delivered to Rowan on
  September 26, 2002
• Rowan personnel were trained on system by PAC

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Test Parameters

• Axis-1 20,000 lbs
• Axis-2 10,000 lbs
• Saw-cut simulated crack

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AE Results
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AE Results
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AE Results
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AE Results
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Future Steps

• Modify test platform design
• Test Shell specimens
• Parameterize AE signatures for 1-D and 2-D stress
  loading