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|Title:||Behavior of hybrid-fiber engineered cementitious composites subjected to dynamic tensile loading and projectile impact||Authors:||Maalej, M.
|Issue Date:||Mar-2005||Citation:||Maalej, M., Quek, S.T., Zhang, J. (2005-03). Behavior of hybrid-fiber engineered cementitious composites subjected to dynamic tensile loading and projectile impact. Journal of Materials in Civil Engineering 17 (2) : 143-152. ScholarBank@NUS Repository. https://doi.org/10.1061/(ASCE)0899-1561(2005)17:2(143)||Abstract:||The characteristics of engineered cementitious composites (ECCs) subjected to dynamic tensile loading and high-velocity projectile impact have been investigated and are reported in this paper. Hybrid-fiber ECC containing a combination of high-modulus steel fibers and relatively low modulus polyethylene fibers was adopted to achieve a desired balance between the ultimate strength and the strain capacity of the material required for impact- and blast-resistant structures. Dynamic uniaxial tensile tests at varying strain rates of 2 × 10-6 to 0.2 s-1 were carried out, and ECC was found to be able to provide much higher enhancement in tensile strength than plain concrete and still be able to maintain pronounced tensile strain-hardening behavior. At higher rates of strain, ECC showed multiple-cracking behavior, similar to that observed from quasi-static tests, with tight crack width of about 0.1 mm. The results from high-velocity (300-750 m/s) impact tests demonstrated the potential of ECC in providing improved functionality (compared with concrete) as a protective material in aspects such as increased shatter resistance with reduction in damage arising from scabbing, spalling, and energy absorption associated with distributed microcracking. © ASCE.||Source Title:||Journal of Materials in Civil Engineering||URI:||http://scholarbank.nus.edu.sg/handle/10635/84530||ISSN:||08991561||DOI:||10.1061/(ASCE)0899-1561(2005)17:2(143)|
|Appears in Collections:||Staff Publications|
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