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Conference Papers


2016

Kopsaftopoulos F.P., Nardari R., Li Y.-H., Chang F.-K., “Bio-inspired state sensing and awareness for morphing fly-by-feel UAVs”, invited paper, CIMTEC 2016 – 7th Forum on New Materials: 5th International Conference Smart and Multifunctional Materials, Structures and Systems, Perugia, Italy, June 2016.


Ladpli P., Nardari R., Rewari R., Liu H., Slater M., Kepler K.D., Wang Y., Kopsaftopoulos F.P., Chang F.-K., “Multifunctional energy storage composites – Design, fabrication, and experimental characterization”, accepted, ASME 2016 Power & Energy Conference, Charlotte, NC, USA, June 2016.


Kopsaftopoulos F.P., Nardari R., Li Y.-H., Chang F.-K., “Self-sensing self-diagnostic compos- ites for the next generation of intelligent aerospace structures”, accepted, AHS International 72nd Annual Forum and Technology Display – “Leveraging Emerging Technologies for Future Capa- bilities”, West Palm Beach, Florida, USA, May 2016.


Kopsaftopoulos F.P., Nardari R., Li Y.-H., Chang F.-K., “A bio-inspired self-sensing com- posite UAV wing with structural and flight awareness capabilities”, accepted, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, Las Vegas, NV, USA, March 2016.


Zhuang Y., Kopsaftopoulos F.P., Chang F.-K., “A self-diagnostic adhesive for monitoring bonded joints in aerospace structures”, accepted, SPIE Smart Structures and Materials + Non- destructive Evaluation and Health Monitoring, Las Vegas, NV, USA, March 2016.


2015

Kopsaftopoulos F.P., Nardari R., Li Y.-H., Chang F.-K., “Experimental identiftcation of struc- tural dynamics and aeroelastic properties of a self-sensing smart composite wing”, Pro- ceedings of the 10th International Workshop on Structural Health Monitoring (IWSHM), Stanford University, USA, September 2015.


Zhuang Y., Kopsaftopoulos F.P., Chang F.-K., “Bondline integrity monitoring of adhesively bonded structures via an electromechanical impedance based approach”, Proceedings of the 10th International Workshop on Structural Health Monitoring (IWSHM), Stanford University, USA, September 2015. http://dx.doi.org/10.12783/SHM2015/26


Ladpli P., Nardari R., Wang Y., Hernandez-Gallegos P., Rewari R., Kuo H., Kopsaftopoulos F.P., Kepler K., Lopez H.,Chang F.-K., “Multifunctional energy storage composites for SHM dis- tributed sensor networks”, Proceedings of the 10th International Workshop on Structural Health Monitoring (IWSHM), Stanford University, USA, September 2015. http://dx.doi.org/10.12783/SHM2015/276


Hajrya R. Kopsaftopoulos F.P., Roy S., Ladpli P., Chang F.-K., “Decision making for reference- free damage detection”, Proceedings of the 10th International Workshop on Structural Health Mo- nitoring (IWSHM), Stanford University, USA, September 2015. http://dx.doi.org/10.12783/SHM2015/367


Kopsaftopoulos F.P., Nardari R., Li Y.-H., Chang F.-K., “A composite intelligent wing with state sensing and awareness capabilities”, 20th International Conference on Composite Materials (ICCM), Copenhagen, Denmark, July 2015.


Zhuang Y., Kopsaftopoulos F.P., Chang F.-K., “A self-diagnostic adhesive for monitoring bonded joints in composite structures”, to appear in the Proceedings of the Composites and Advanced Materials Expo (CAMX), Dallas, TX, USA, October 2015.


Kopsaftopoulos F.P., Nardari R., Li Y.-H., Chang F.-K., “State sensing and awareness for the next generation of autonomous fly-by-feel UAVs”, Proceedings of the SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, San Diego, CA, USA, March 2015.


Janapati V., Kopsaftopoulos F.P., Lee S.J., Chang F.-K., “Model-assisted structural health monitoring system reliability quantiftcation”, Proceedings of the Technical Specialists’ Meeting on Airworthiness, Condition Based Maintenance (CBM), and Health and Usage Monitoring (HUMS), Huntsville, AL, USA, February 2015.


2013

Janapati V., Kopsaftopoulos F., Roy S., Mueller I., Lee S.-J., Ladpli P., Chang F.-K.,"Sensor Network Configuration Effect on Detection Sensitivity of an Acousto-Ultrasound-based Active SHM System",Proceedings of the 9th International Workshop on Structural Health Monitoring, September 2013, Stanford University, USA.


Larrosa C., Chang F.-K.,"Monitoring Transverse Matrix Cracking in Composite Laminates Using Ultrasonic Guided Waves",Proceedings of the 9th International Workshop on Structural Health Monitoring, DEStech Publications Inc., September 2013.


Li Y.-H., Kim S.-J., Nardari R., Oropeza D., Chang F.-K.,"Development of High Performance BS-PT Based Piezoelectric Transducer for Structural Health Monitoring of High-Temperature Polymer-Matrix Composite Structures ",Proceedings of the 9th International Workshop on Structural Health Monitoring, DEStech Publications Inc., September 2013.


Roy S., Chang F.-K., Lee S.-J., Pollock P., Janapati V.,"A novel machine-learning approach for structural state identification using ultrasonic guided waves ",Proceedings of the 9th International Workshop on Structural Health Monitoring, DEStech Publications Inc., September 2013.


Roy S., Ladpli P., Lonkar P., Chang F.-K.,"Structural damage detection using ultrasonic guided waves under varying ambient temperature and loading environments ",Proceedings of the 9th International Workshop on Structural Health Monitoring, DEStech Publications Inc., September 2013.


Salowitz N., Guo Z., Roy S., Nardari R., Li Y.-H., Kim S.-J., Kopsaftopoulos F., Chang F.-K.,"A vision on stretchable bio-inspired networks for intelligent structures ",Invited Keynote Paper, Proceedings of the 9th International Workshop on Structural Health Monitoring, DEStech Publications Inc., September 2013.


Salowitz N., Guo Z. Kim S.-J., Li Y.-H., Lanzara G., Chang F.-K.,"Screen Printed Piezoceramic Actuators/Sensors Microfabricated on Organic Films and Stretchable Networks ",Proceedings of the 9th International Workshop on Structural Health Monitoring, DEStech Publications Inc., September 2013.


2012

Janapati V., Lonkar K., Chang F.-K.,"Real time in-situ damage classification, quantification and diagnosis for composite structures", Proceedings of the 19th International Congress on Sound and Vibration, Vilnius, Lithuania, July 2012.


Salowitz N., Guo Z. Kim S.-J., Li Y.-H., Lanzara G., Chang F.-K.,"Bio-inspired intelligent sensing materials for fly-by-feel autonomous vehicles",IEEE Sensors, Taipei, Taiwan, October 2012.


Janapati, V., Lonkar, K., Chang, F.-K., "Design of Optimal Layout of Active Sensing Diagnostic Network for Achieving Highest Damage Detection Capability in Structures," 6th EWSHM, July 2012, Dresden, Germany, submitted.


Lonkar, K., Janapati, V., Roy, S., Chang, F.-K., "A Model-assisted Integrated Diagnostics for Structural Health Monitoring," 53rd AIAA Structures, Structural Dynamics and Materials Conference, April 2012, Hawai'i, USA.


Roy, S., Mueller, I., Janapati, V., Das, S., Chang, F.-K., "Real-time prediction of impact-induced damage for composite structures based on failure analysis and efficient database methods", Proceedings of SPIE Annual Conference on Smart Structure & NDE 2012, San Diego, CA/USA, 8348-55.


Lanzara, G., Guo, Z., Salowitz, N.P., Chang, F.-K., "Strain/Elongation Sensitive Metal-Coated Polyimide Microwires for Micro-Scaled Highly Expandable Sensor Networks", Submitted.


2011

Salowitz, N. P., Li, Y.-H., Kim, S.-J., Roy, S., Chang, F.-K., "Structural Health Monitoring of High Temperature Composites", Proceedings of the ASME International Mechanical Engineering Congress & Exposition, Denver Colorado, November 2011.


Lonkar, K., Chang, F.-K., "Development of SEM-based PESEA Code for Modeling PZT Induced Acousto-ultrasonic Waves Propagating in Metallic & Composite Structures," Proceedings of the 8th International Workshop on Structural Health Monitoring, September 2011, Stanford University, USA, Vol. 2, pp 2512-2520.


Roy, S., Lonkar, K., Janapati, V., Chang, F.-K., "Physics Based Temperature Compensation Strategy for Structural Health Monitoring," Proceedings of the 8th International Workshop on Structural Health Monitoring, September 2011, Stanford University, USA, Vol. 1, pp 1139-1149.


Lopes, V., Gonsalez, C., da Silva, S., Roy, S., Kode, K., Sunor, F., Chang, F.-K., "Characterization of temperature, load and damage effects using piezo-electric transducer patches based on fuzzy clustering," Proceedings of the 8th International Workshop on Structural Health Monitoring, September 2011, Stanford University, USA, Vol. 1, pp 1196-1205.


Guo, Z., Kim, K., Lanzara, G., Salowitz, N.P., Peumans, P., Chang, F.-K., "Bio-Inspired Smart Skin Based on Expandable Network", Proceedings of the 8th International workshop on Structural Health Monitoring, Condition-based Maintenance and Intelligent Structures, Stanford California, September 2011, pp.1717.


Larrosa, C., Lonkar, K., Shankar, S., Chang, F.-K., "Damage classification in composite laminates, matrix micro-cracking and delamination", Proceedings of the 8th International Workshop on Structural Health Monitoring, Vol. 2, pp 191-199, DEStech Publications Inc., September 2011.


Saxena, A.: Goebel, K., Larrosa, C., Janapati, V., Roy, S., Chang, F.-K., "Accelerated aging experiments for prognostics of damage growth in composite materials", Proceedings of the 8th International Workshop on Structural Health Monitoring, Vol. 2, pp 1283-91, DEStech Publications Inc., September 2011.


Mueller, I., Janapati, V., Banerjee, S., Lonkar, K., Roy, S., Chang, F.-K., "On the Performance Quantification of Active Sensing SHM Systems using Model-assisted POD Methods", Proceedings of the 8th International Workshop of Structural Health Monitoring 2011, Stanford, CA / USA, September 2011.


Mueller, I., Vonnieda, K., Das, S., Chang, F.-K., "A Robust Impact Force Determination Technique for Complex Structures", Proceedings of the 8th International Workshop of Structural Health Monitoring 2011, Stanford, CA / USA, September 2011.


Salowitz, N., Guo, Z., Li, Y.-H., Kim, K., Lanzara, G., Kim, K., Chen, Y., Chang, F.-K., "Development of a bio-inspired stretchable network for intelligent composites", Proceedings of the 18th International Conference on Composite Materials, Jeju South Korea, August 2011.


Li, Y.-H., Kim, S.-J., Salowitz, N.P., Roy, S., Larrosa, C., Janapati, V., Chang, F.-K., "High Temperature Intelligent Composites", Proceedings of the 18th International Conference on Composite Materials, Jeju South Korea, August 2011.


Larrosa, C., Janapati, V., Roy, S., Chang, F.-K., "In-situ damage assessment of composite laminates via active sensor networks", Proceedings of the 2011 Aircraft Airworthiness and Sustainment Conference, San Diego, Ca., April 2011.


Guo, Z., Kim, K., Lanzara, G., Salowitz, N. P., Peumans, P., Chang, F.-K., "Micro-Fabricated, Expandable Temperature Sensor Network for Macro-Scale Deployment in Composite Structures" Proceedings of the IEEE Aerospace Conference, Big Sky, MT, March 2011.


2010

Mueller, I., Das, S., Roy, S., Janapati, V., Vonnieda, K., Zhang, D., Chang, F.-K., "An Integrated Health Management System for Real-Time Impact Monitoring and Prediction of Impact-Induced Damage on Composite Structures", Proceedings of the SPIE Annual Conference on Smart Structure & NDE 2010, San Diego, CA / USA, Vol. 7650, 76501D, 2010.


Mueller, I., Chang, F.-K., "The Needs for SHM Technology Classification", Proceedings of the Asia Pacific Workshop on Structural Health Monitoring (APWSHM), Tokyo / Japan, 2010.


2009

Mueller, I., Larrosa, C., Roy, S., Mittal, A., Lonkar, K., Chang, F.-K., "A robust structural health monitoring technique for airframe structures", Proceedings of the Chou Symposium, American Society for Composites - 24th Technical Conference, 2009.


Mueller, I., Larrosa, C., Roy, S., Mittal, A., Lonkar, K., Chang, F.-K., "An integrated health management and prognostic technology for composites airframe structures", Proceedings of the annual conference of the Prognostics and Health Management Society, October 2009.


Ha, S., Mittal, A., Lonkar K., Chang, F.-K., "Adhesive Layer Effects on Temperature-sensitive Lamb Waves Induced by Surface-mounted PZT Acutators," Proceedings of the 7th International Workshop on Structural Health Monitoring, September 2009, Stanford University, USA, Vol. 2, pp 2221-2233.


Salowitz, N., Lanzara, G., Guo, Z., Rose, J., Chang, F.-K., "Design of Planar Electrodes for Multifunctional Piezoelectric Sensors", Proceedings of the 7th International workshop on Structural Health Monitoring, from System Integration to Autonomous Systems, Stanford California, September 2009 pp. 1080.


Lanzara, G., Salowitz, N., Guo, Z., Chatterjee, D., Kim, K., Peumans, P., Chang, F.-K., "Multifunctional Sensor Nodes in Stretchable Network for Structural Health Monitoring", Proceedings of the 7th International workshop on Structural Health Monitoring, from System Integration to Autonomous Systems, Stanford California, Septemeber 2009, pp.805.


Mueller, I., Larrosa, C., Roy, S., Chang, F.-K., "An integrated diagnostic to prognostic SHM technology for structural health management", Best paper Award. Proceedings of the 7th International Workshop on Structural Health Monitoring, DEStech Publications Inc., September 2009.


Mueller, I., Chang, F.-K., Roy, S., Mittal, A., Lonkar, K., Larrosa, C., "A Robust Structural Health Monitoring Technique for Airframe Structures", Proceedings of the 24th Annual ASC Technical Conference, Newark, DE / USA, 2009.


Mueller, I., Chang, F.-K., "Model-Based Impact Monitoring by Inverse Methods using Particle Swarm Optimization", Proceedings of the IMAC XXVII Conference & Exposition on Structural Dynamics 2009, Orlando, FL / USA, 2009.


Guo, Z., Mueller, I., Lanzara, G., Janapala, N., Lonkar, K., Mittal, A., Larrosa, C., Roy, S., Salowitz, N., Kim, K., Chang, F.-K., "SACL Activities in Structural Health Monitoring," 12th International Conference of Experimental Mechanics, 2009, China.


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Journal Papers


2016

Zhuang Y., Kopsaftopoulos F.P., Chang F.-K., “A self-diagnostic adhesive for bondline in- tegrity monitoring of aerospace structures”, invited paper, submitted to Structural Health Monitoring


Salowitz N., Kim S.-J., Kopsaftopoulos F.P., Li Y.-H., Chang F.-K., “Design and analysis of radially polarized screen-printed piezoelectric transducers”, submitted to Journal of Intelligent Material Systems and Structures


Dugnani R., Zhuang Y., Kopsaftopoulos F.P., Chang F.-K., “Adhesive bondline degradation detection via a cross-correlation EMI-based approach ”, under revision, Structural Health Monitoring


Janapati V., Kopsaftopoulos F.P., Lee S.J., Chang F.-K., “Damage detection sensitivity char- acterization of acousto-ultrasound-based SHM techniques”, Structural Health Monitoring, in press, 2016. http://dx.doi.org/10.1177/1475921715627490


2014

Larrosa, C., Lonkar, K., Chang, F-K., "In situ damage classification for composite laminates using Gaussian discriminant analysis", Structural Health Monitoring, 2014, vol.13(2), pp. 190-204, DOI: 10.1177/1475921713517288.


Roy, S., Lonkar, K., Janapati, V., Chang, F.-K., "A novel physics-based temperature compensation model for structural health monitoring using ultrasonic guided waves", accepted in Structural Health Monitoring (In Press).


Salowitz, N., Guo, Z., Kim, S.-J., Li, Y.-H., Lanzara, G., Chang, F.-K., "Micro-fabricated expandable sensor networks for intelligent sensing materials", Invited Paper, accepted in IEEE Sensors, DOI: 10.1109/JSEN.2013.2297699.


5. Salowitz N., Guo Z., Roy S., Nardari R., Li Y.-H., Kim S.-J., Kopsaftopoulos F.P., Chang F.-K., “Recent advancements and vision toward stretchable bio-inspired networks for intelligent structures”, Structural Health Monitoring, Vol. 13, No. 6, pp. 609–620, 2014. http://dx.doi.org/10.1177/0725513614554076


2013

Lonkar K., Chang F.-K.,"Modeling of piezo-induced ultrasonic wave propagation in composite structures using layered solid spectral element ", Structural Health Monitoring, Accepted for Publication


Salowitz N., Guo Z., Li Y.-H., Kim K., Lanzara G., and Chang F.-K.,"Bio-Inspired Stretchable Network Based Intelligent Composites",Invited paper, Journal of Composite Materials, vol. 47(1), pp. 97-105.


2012

Mueller, I., Janapati, V., Markmiller, J., Chang, F.-K., "SHM Performance Quantification based on Technology Classification Levels: A Passive Sensing System Evaluation", Structural Health Monitoring -- An International Journal, Submitted for Publication, 2012.


2011

Salowitz, N. P., Guo, Z., Li, Y.-H., Kim, K., Lanzara, G., and Chang, F.-K., "Bio-Inspired Stretchable Network Based Intelligent Composites" Invited & Submitted: Journal of Composite Materials, September 2011.


2010

Ha, S., Lonkar, K., Mittal, A., Chang, F.-K., "Adhesive Layer Effects on PZT-induced Lamb Waves at Elevated Temperatures," Journal of Structural Health Monitoring, Vol. 26, May 2010.


Lanzara, G., Salowitz, N.P., Guo, Z., Chang, F.-K., "A Spider Web-Like Highly Expandable Sensor Network", Advanced Materials, Volume 22, Issue 41, pp 44643-4648, November 2010.


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