Studies on effects of elevated temperature for guided-wave structural health monitoring

Large thermal variations can cause significant changes in guided-wave (GW) propagation and transduction for structural health monitoring (SHM). This work focuses on GW SHM using surface-bonded piezoelectric wafer transducers in metallic plates for the temperature range encountered in internal spacecraft structures (20°C to 150°C). First, studies done to determine a suitable bonding agent are documented. That was then used in controlled experiments to examine changes in GW propagation and transduction using PZT-5A piezoelectric wafers under quasi-statically varying temperature (also from 20°C to 150°C). Modeling efforts to explain the experimentally observed increase in time-of-flight and change in sensor response amplitude with increasing temperature are detailed. Finally, these results are used in detection and location of mild and moderate damage using the pulse-echo GW testing approach within the temperature range.

[1]  Carlos E. S. Cesnik,et al.  Lamb‐Wave Based Structural Health Monitoring , 2005 .

[2]  Carlos E. S. Cesnik,et al.  Review of guided-wave structural health monitoring , 2007 .

[3]  David E. Myers,et al.  Parametric Weight Comparison of Advanced Metallic, Ceramic Tile, and Ceramic Blanket Thermal Protect , 2000 .

[4]  Daniel J. Inman,et al.  TEMPERATURE-DEPENDENT THERMOELASTIC PROPERTIES FOR MACRO FIBER COMPOSITE ACTUATORS , 2004 .

[5]  Jeffrey T. Chambers,et al.  Durability Assessment of Lamb Wave-Based Structural Health Monitoring Nodes , 2006 .

[6]  Craig A. Rogers,et al.  The Pin-Force Model Revisited , 1994 .

[7]  Paul D. Wilcox,et al.  The temperature stability of guided wave structural health monitoring systems , 2006 .

[8]  J. Michaels,et al.  A methodology for structural health monitoring with diffuse ultrasonic waves in the presence of temperature variations. , 2005, Ultrasonics.

[9]  L. Orkney,et al.  Elevated temperature modulus measurements using impulse excitation techniques (IET). , 2000 .

[10]  Mark J. Schulz,et al.  Piezoelectric Materials at Elevated Temperature , 2003 .

[11]  Alan Crocker,et al.  Health Management and Automation for Future Space Systems , 2005 .

[12]  Harry H. Hilton,et al.  BENDING-TORSION FLUTTER OF LINEAR VISCOELASTIC WINGS INCLUDING STRUCTURAL DAMPING , 1993 .

[13]  Graeme Manson,et al.  Environmental Effects on Lamb Wave Responses from Piezoceramic Sensors , 2003 .

[14]  Carlos E. S. Cesnik,et al.  Finite-dimensional piezoelectric transducer modeling for guided wave based structural health monitoring , 2005 .

[15]  Carlos E. S. Cesnik,et al.  Guided-wave signal processing using chirplet matching pursuits and mode correlation for structural health monitoring , 2006, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.