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Despite the relevant development of PF methods within the last decade, a careful revisitation of the State of the Art shreds of evidence that these numerical techniques have been developed for their application for a limited type of engineering materials, with major attention for brittle fracture. However, PF methods possess enormous potential for the inclusion of phenomenological or physically-motivated failure criteria for brittle or ductile failure in a modular form, which can widen its range of application. Within this context, in this research, I developed sophisticated phenomenological material models based on the PF approach to fracture that can be employed into Finite Element Analysis (FEA) packages for virtual testing of damage and fracture in FRPs. A central aspect of this investigation is the development of a comprehensive theoretical and numerical study of PF methods for polymeric-based fiber-reinforced composites, namely Short Fiber Reinforced Polymers (SFRPs) and Long Fiber Reinforced Polymers (LFRPs).<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t