Fig. 1 The received ultrasonic pulse in ( a ) time domain and ( b ) frequency domain More about this image found in The received ultrasonic pulse in ( a ) time domain and ( b ) frequency doma...

Fig. 2 The received ultrasonic pulse in the frequency domain, which is used to compute the SPC-I. The twenty horizontal lines represent the threshold (in dB) used to assess the peak count. More about this image found in The received ultrasonic pulse in the frequency domain, which is used to com...

Fig. 3 A schematic representation of the experimental setup More about this image found in A schematic representation of the experimental setup

Fig. 4 Variation of the normalized second harmonic amplitude ( X ) with ( a ) load and time, ( b ) AE-based damage index—D, and ( c ) AE-based b -value with load for the mortar specimen More about this image found in Variation of the normalized second harmonic amplitude ( X ) with ( a ) load...

Fig. 5 Variation of the normalized second harmonic amplitude ( X ) with ( a ) load and time, ( b ) AE-based damage index—D, and ( c ) AE-based b -value with load for the M15-20 mm specimen More about this image found in Variation of the normalized second harmonic amplitude ( X ) with ( a ) load...

Fig. 6 Variation of the normalized second harmonic amplitude ( X ) with ( a ) load and time, ( b ) AE-based damage index—D, and ( c ) AE-based b -value with load for the M50 specimen More about this image found in Variation of the normalized second harmonic amplitude ( X ) with ( a ) load...

Fig. 7 Variation of the normalized second harmonic amplitude ( X ) with ( a ) load and time, ( b ) AE-based damage index—D, and ( c ) AE-based b -value with load for the M15-10 mm specimen More about this image found in Variation of the normalized second harmonic amplitude ( X ) with ( a ) load...

Fig. 8 Normalized second harmonic amplitude variation with load for all specimens More about this image found in Normalized second harmonic amplitude variation with load for all specimens

Fig. 9 Absolute value of total damage variation using X for all specimens More about this image found in Absolute value of total damage variation using X for all specimens

Fig. 10 Variation of SPC-index and X with time for ( a ) mortar, ( b ) M15-20 mm, ( c ) M50-20 mm, ( d ) BSFRC M15-20 mm, and ( e ) M15-10 mm More about this image found in Variation of SPC-index and X with time for ( a ) mortar, ( b ) M15-20 mm,...

Fig. 1 A set-theoretic representation of the physical and digital components of a cyberphysical system (CPS), which can be deployed for active monitoring and prognostics of safety-critical engineering systems More about this image found in A set-theoretic representation of the physical and digital components o...

Fig. 2 Process flow of signal acquisition and processing algorithms operating on the edge device constituting the CyberSHM physical layer More about this image found in Process flow of signal acquisition and processing algorithms operating on t...

Fig. 3 Curing cycle employed to the debulked 12-layered USN 150 B [ + 45 3 / − 45 3 ] S layup to fabricate the test samples More about this image found in Curing cycle employed to the debulked 12-layered USN 150 B [ + 45 3...

Fig. 4 Experimental setup consisting of the CFRC sample interrogated by an edge device with two NANO30 transducers and a remote workstation More about this image found in Experimental setup consisting of the CFRC sample interrogated by an edge de...

Fig. 5 Diagram of ( 500 × 500 × 3 ) m m sample with symmetric D1 and asymmetric D2 ( 30 × 30 × 0.02 ) m m delamination locations and transducer placement More about this image found in Diagram of ( 500 × 500 × 3 ) m m sample with symmetric D1 ...