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Advanced Shape Memory Alloy Fibers Designed To Enhance Crack Closure And Re-Centring Performance In Cement-Based Composites, Ayoub Dehghani, Farhad Aslani
Advanced Shape Memory Alloy Fibers Designed To Enhance Crack Closure And Re-Centring Performance In Cement-Based Composites, Ayoub Dehghani, Farhad Aslani
Research outputs 2022 to 2026
Crack-closing and re-centring attributes were observed in cementitious composites utilising segmented pseudoelastic shape memory alloy fibres (S-PSMAFs) developed in this study. S-PSMAFs, produced via laboratory deep drawing, displayed notable strain recovery capacity during detwinning and martensite phases in direct cyclic tensile tests. Cementitious composites incorporating S-PSMAFs at 0.5%, 0.75%, and 1.0% dosages underwent testing in static and cyclic flexure using both unnotched and notched beams. Results were compared with steel fibre (SF) reinforced specimens. Digital image correlation (DIC) provided full-field strain maps and crack propagation data. The cyclic testing allowed assessment of crack-closing and re-centring behaviour at varying deflections post-cracking …