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Autoadaptive Media: Overview from Previous Workshops

Autoadaptive Media: Overview from Previous Workshops. Robert J. Frosch. Department of Civil Engineering Purdue University West Lafayette, IN. Autoadaptive Media. Controllable Fluids Electro-rheological Magneto-rheological Controllable Solids Electrostrictive Magnetostrictive

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Autoadaptive Media: Overview from Previous Workshops

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  1. Autoadaptive Media: Overview from Previous Workshops Robert J. Frosch Department of Civil Engineering Purdue University West Lafayette, IN

  2. Autoadaptive Media • Controllable Fluids • Electro-rheological • Magneto-rheological • Controllable Solids • Electrostrictive • Magnetostrictive • Shape-Memory Alloys

  3. Controllable Fluids Under Electric/Magnetic Field Changes Viscosity OFF ON

  4. Controllable Solids OFF ON Under Electric/Magnetic Field Change Shape Under Deformation Produce Electric Field

  5. Shape Memory Alloys Change Properties by Temperature Shape Yield Stress Stiffness Heating Cooling Heat Bend

  6. US-Japan Workshops • Sonoma Workshop • 17-19 May 1998 • Set Goals to Stimulate Research Interest • West Lafayette Workshop • 8-9 January 1999 • Maintain Enthusiasm and Complete Work • Develop Research Recommendations

  7. Workshop Goal Define Objectives for Cooperative US-Japan Research Initiative Uses of Autoadaptive Media in Civil Engineering Systems

  8. Research: Structures • Basic Research • Controllable Fluids • Controllable Solids • SMA • Comparative Studies • Health Monitoring/Remote Sensing • Imaging • Interrogation

  9. Research: Geotechnical • Uses in Geotech Not Explored • Creative Applications Required • Use AAM to Modify Soil Properties • Stiffness • Viscosity • Minimize Intervention • Localized • New Tools and Understanding Required

  10. Geotechnical Research • Modify Soil Properties • Stiffness, Damping, Permeability • Control Soil-Structure Interaction Mechanisms • Develop Tools to Assess and Upgrade Damaged Structures • Develop Sensing and Health Monitoring

  11. Research: Instrumentation and Sensor Systems To Respond Autoadaptively: • Aware of Critical Events Affecting • Serviceability • Safety • Identify and Focus • Important Events • Critical Data • Pick and Choose Data

  12. Research Status • US-Japan Cooperative Research in Urban Earthquake Disaster Mitigation • 5 Year program in US (Mar. 1998 – Oct. 2001) • Advanced Technologies • 7 Projects Funded To-Date • US-Japan Cooperative Research Project on Smart Structural Systems • 5 Year program in Japan (Apr. 1998 - Mar. 2003 ) • BRI, Ministry of Construction

  13. Japan Program • System Application • Structural System • Sensing and Monitoring • Effectors • Proof-of-Concept • Large Scale Shake Table Test (Jan.-Mar. 2002) • Several Concepts Tested • US Participation

  14. Conclusions • Vast Opportunities and Challenges • Creativity Needed • Cross-Cutting and Cooperative Research • Current Research • Beginning • Explore and Utilize New Materials Make the Impossible, Possible!

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