Assessment of fracture process in forta and polypropylene fiber-reinforced concrete using experimental analysis and digital image correlation

作     者：Seyed Hamid KALALI Hamid ESKANDARI-NADDAF Seyed Ali EMAMIAN Seyed Hamid KALALI;Hamid ESKANDARI-NADDAF;Seyed Ali EMAMIAN

作者机构：Department of Civil EngineeringHakim Sabzevari UniversitySabzevar ***Iran 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2022年第16卷第12期

页      面：1633-1652页

核心收录：

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 

主　　题：fiber-reinforced concrete forta-ferro and polypropylene fiber fracture process cracking behavior digital image correlation 

摘      要：This paper aims to characterize the evolution of the fracture process and the cracking behavior in fortaferro(FF)and polypropylene(PP)fiber-reinforced concrete under the uniaxial compressive loading using experimental analysis and digital image correlation(DIC)on the surface *** this purpose,6 mix designs,including two FF volume fractions of 0.10%,and 0.20%and three PP volume fractions of 0.20%,0.30%,and 0.40%,in addition to a control mix were evaluated according to compressive strength,modulus of elasticity,toughness index,and stress–strain *** influence of fibers on the microstructural texture of specimens was analyzed by scanning electron microscope(SEM)*** show that FF fiber-reinforced concrete specimens demonstrated increased ductility and strength compared to PP *** results revealed that the major crack and fracture appeared at the peak load of the control specimen due to brittleness and sudden gain of large lateral strain,while a gradual increase in micro-crack quantity at 75%of peak load was observed in the fiber specimens,which thenbegan to connect with each other up to the final *** accuracy of the results supports DIC as a reliable alternative for the characterization of the fracture process in fiber-reinforced concrete.