ACOUSTIC EMISSION CHARACTERIZATION OF DAMAGE IN HYBRID FIBER-REINFORCED POLYMER RODS

The development and testing of a pseudoductile hybrid fiber-reinforced polymer rod consisting of glass and carbon fibers is described. Two different hybrid forms were considered for the development of the hybrid rods, including (1) random dispersion of the glass and carbon fibers; and (2) a core-shell design with a glass fiber core protected by the carbon fiber shells. The mechanical properties of the hybrids were evaluated through uniaxial tension tests. The hybrid rods developed by way of the core-shell approach exhibited pseudoductile properties that included a yield point of 1,153 MPa and an ultimate strength of 1,191 MPa, with a strain of 3.5% at ultimate. The experimental program also included damage assessment by way of a single-channel fiber optic acoustic emission (AE) sensor. The acoustic emission technique was employed for real-time determination of the progressive damage due to rupture of fibers. Moreover, the spectral energies of the frequency spectrum from the AE signals were employed for as...

[1]  A. Nanni,et al.  Tensile properties of hybrid rods for concrete reinforcement , 1994 .

[2]  Suzanne M. Ferguson,et al.  Fiber-optic interferometric sensor for the detection of acoustic emission within composite materials. , 1990, Optics letters.

[3]  C. Bakis,et al.  Self-monitoring, pseudo-ductile, hybrid FRP reinforcement rods for concrete applications , 2001 .

[4]  T. Triantafillou,et al.  Low Cost Maglev Guideway Design Using Hybrid FRP-Reinforced Cocnrete , 1993 .

[5]  R. Tepfers,et al.  Ductility of hybrid fiber composite reinforcement FRP for concrete , 1996 .

[6]  B Culshaw,et al.  Surface-bonded and embedded optical fibers as ultrasonic sensors. , 1996, Applied optics.

[7]  Charles W. Dolan.  Developments in Non-Metallic Prestressing Tendons , 1990 .

[8]  Amir Mirmiran,et al.  ACOUSTIC EMISSION MONITORING OF HYBRID FRP-CONCRETE COLUMNS , 1999 .

[9]  Arup K. Maji,et al.  Acoustic emissions from reinforced concrete , 1994 .

[10]  R. G. Priest,et al.  Optical fiber sensor technology , 1982, 1985 International Electron Devices Meeting.

[11]  H. G. Harris,et al.  Ductile Hybrid Fiber Reinforced Plastic Reinforcing Bar for Concrete Structures: Design Methodology , 1998 .

[12]  Sami H. Rizkalla,et al.  SERVICEABILITY OF CONCRETE BEAMS PRESTRESSED BY CARBON-FIBER-REINFORCED-PLASTIC BARS , 1997 .

[13]  Arup K. Maji,et al.  Acoustic Emission Source Location Using Lamb Wave Modes , 1997 .

[14]  Farhad Ansari,et al.  Fiber optic acoustic emission distributed crack sensor for large structures , 2000 .

[15]  Nabil F. Grace,et al.  DUCTILITY OF PRESTRESSED BRIDGES USING CFRP STRANDS , 1998 .

[16]  Antonio Nanni,et al.  SMART, PSEUDO-DUCTILE, REINFORCING RODS FOR CONCRETE: MANUFACTURE AND TEST , 1996 .