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Home  > Raw materials & technologies  > Applications  > Investigation of TRC tensile response by a...

Tuesday, 12 November 2019
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Raw materials & technologies, Applications

Investigation of TRC tensile response by acoustic emission

Friday, 8 November 2019

The fracture processes on coupons of glass-fibre textile reinforced cementitious (TRC) matrix composites under tension are revealed using acoustic emission monitoring (AE) method.

The study discloses the presence of early mortar micro-cracking and assesses the nature of multi-scale damage. Source: Tono Balaguer – stock.adobe.com.
The study discloses the presence of early mortar micro-cracking and assesses the nature of multi-scale damage. Source: Tono Balaguer – stock.adobe....

The fundamental study, based on acoustic signals magnitude, shape and frequency content, discloses the presence of early mortar micro-cracking and assesses the nature of multi-scale damage developed as the ultimate matrix strength is reached. At post-cracking stage, the AE signals are classified to indicate different fracture mechanisms: fibres extension, textile slippage and matrix-fibres debonding.

An inside view of the fracture process on TRC coupons

Digital image correlation is applied as supplementary technique to verify the AE outcome. For the first time in literature, the proposed AE-based methodology fully characterises and provides an inside view of the fracture process on TRC coupons under tension overcoming modelling assumptions that were previously in place.

The study is published in: Cement and Concrete Research Volume 123, September 2019, 105776.

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