Elastic limit tensile stress of UHPFRC: Method of determination and effect of fiber orientation

This paper discusses the influence of fiber orientation on elastic limit tensile stress ultra-high performance reinforced cementitious composites (UHPFRC). An original model relating to is proposed, and three determination methods are compared. Five specimens tested under uniaxial tension characterized with digital image correlation, acoustic emission displacement transducers. Before testing, distribution (local dosage orientation) each specimen determined using a magnetic probe. After (offset 2 different threshold values, deformation modulus drop) applied determine stress. The test results show that proposed estimates well basis orientation. modulus-drop method yields most representative value for considering underlying physical phenomena. It may be taken as definition UHPFRC.