Using Acoustic Emission to Quantify Damage in High-Performance Fiber-Reinforced Cement Composites under Cyclically Compressive Loading

Sang Hyun Nam; Young Jae Song; Sun Woo Kim; Hyun Do Yun

doi:10.4028/www.scientific.net/AMR.163-167.2549

Paper Titles

Assessing the Fracture and Damage Process in Recycled Aggregate Concrete under Compressive Loading by Acoustic Emission
p.2528

The Modal Identification of Structure Using Distributed ERA and EFDD Methods
p.2532

Damage Detection for Truss Structures Depending on Method of Change in Elemental Modal Strain
p.2537

Trial Study on Methods of Damage Extent Identification Based on Wavelet Transform of Strain Signal
p.2543

Using Acoustic Emission to Quantify Damage in High-Performance Fiber-Reinforced Cement Composites under Cyclically Compressive Loading
p.2549

Monitoring for Large Cross-Section CFSTs of a Super High-Rise Building with Piezoceramic Actuators and Sensors
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Study on the Numerical Simulation of Massive Concrete Sidewall Hydration Heat under Negative Temperature Transient Boundary
p.2560

Experimental Study on Temperature Fields of Dumbbell-Shape Section of CFST Arch Rib and its Effects
p.2564

Study on the Effect of Prestress to the Dynamic Characteristics of Truss String Structure
p.2571

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 163-167Using Acoustic Emission to Quantify Damage in...

Using Acoustic Emission to Quantify Damage in High-Performance Fiber-Reinforced Cement Composites under Cyclically Compressive Loading

Abstract:

High performance fiber-reinforced cement composites (HPFRCCs) show multiple cracks and a limited damage tolerance capability due to the debonding of the fibers of the cement matrix. For practical applications, it is necessary to investigate the fractural behavior of HPFRCCs to understand the mechanism of the microbehavior of a cement matrix containing reinforcing fibers. We have investigated the acoustic emission (AE) signals in HPFRCCs under monotonic and cyclic uniaxial compressive loads. Four types of specimen were tested. The experimental parameters studied were: the type of fiber (polyethylene or polyvinyl alcohol), the hybrid type (with steel cord), and the loading pattern. The data shows that the progress of the damage in HPFRCCs in the compressive mode is characteristic of the type of hybrid fiber and its volume fraction. From the AE data, the second and third compressive load cycles resulted in a successive decrease in the amplitude compared to the first compressive load cycle. In addition, an AE Kaiser effect was observed in HPFRCCs specimens up to 80% of their ultimate strength. These observations suggest that the AE Kaiser effect has potential for use as a new tool to monitor the loading history of HPFRCCs.