TY - GEN
T1 - Strain transfer for optimal performance of sensing sheet
AU - Gerber, Matthew J.
AU - Glisic, Branko
N1 - Funding Information:
This research was in part supported by the Princeton Institute for the Science and Technology of Materials (PRISM) and in part by the USDOT-RITA UTC Program, grants no. DTRT12-G-UTC16 and DTRT13-G-UTC28, enabled through the Center for Advanced Infrastructure and Transportation (CAIT) at Rutgers University. The authors would like to thank C. Weaver, N. Verma, J.C. Sturm, S. Wagner, and J. Vocaturo from Princeton University for their precious help.
PY - 2017
Y1 - 2017
N2 - Sensing sheets based on Large Area Electronics (LAE) and Integrated Circuits (ICs) are novel sensors designed to enable reliable early-stage detection of local unusual structural behaviors. Such a device consists of a dense array of strain sensors, patterned onto flexible polyimide substrate along with associated electronics. Previous tests performed on steel specimens equipped with sensing sheet prototypes and subjected to fatigue cracking pointed to a potential issue: individual sensors that were on or near a crack would immediately fail, and could not be used to assess the size of the crack opening or to monitor the future crack growth. In these tests, a stiff adhesive was used to bond the sensing sheet prototype to the steel specimen. Such an adhesive provided excellent strain transfer, but it also caused premature failure of individual sensors within the sheet. Therefore, the aim of this paper is to identify alternative adhesives that alleviate stress concentrations in the sensing sheet at a crack, and provide strain transfer that is sufficient for reliable early-stage crack detection.
AB - Sensing sheets based on Large Area Electronics (LAE) and Integrated Circuits (ICs) are novel sensors designed to enable reliable early-stage detection of local unusual structural behaviors. Such a device consists of a dense array of strain sensors, patterned onto flexible polyimide substrate along with associated electronics. Previous tests performed on steel specimens equipped with sensing sheet prototypes and subjected to fatigue cracking pointed to a potential issue: individual sensors that were on or near a crack would immediately fail, and could not be used to assess the size of the crack opening or to monitor the future crack growth. In these tests, a stiff adhesive was used to bond the sensing sheet prototype to the steel specimen. Such an adhesive provided excellent strain transfer, but it also caused premature failure of individual sensors within the sheet. Therefore, the aim of this paper is to identify alternative adhesives that alleviate stress concentrations in the sensing sheet at a crack, and provide strain transfer that is sufficient for reliable early-stage crack detection.
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U2 - 10.12783/shm2017/14029
DO - 10.12783/shm2017/14029
M3 - Conference contribution
AN - SCOPUS:85032435824
T3 - Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance - Proceedings of the 11th International Workshop on Structural Health Monitoring, IWSHM 2017
SP - 1534
EP - 1540
BT - Structural Health Monitoring 2017
A2 - Chang, Fu-Kuo
A2 - Kopsaftopoulos, Fotis
PB - DEStech Publications
T2 - 11th International Workshop on Structural Health Monitoring 2017: Real-Time Material State Awareness and Data-Driven Safety Assurance, IWSHM 2017
Y2 - 12 September 2017 through 14 September 2017
ER -