Finite Fracture Mechanics extension to dynamic loading scenarios

Abstract The coupled criterion of Finite Fracture Mechanics (FFM) has already been successfully applied to assess the brittle failure initiation in cracked and notched structures subjected quasi-static loading conditions. FFM originality lies addressing onset through simultaneous fulfilment a stress requirement energy balance, both computed over finite distance ahead raiser. Accordingly, this length results be structural parameter, thus able interact with geometry under investigation. This work aims at extending dynamic loadings. To end, general requisites proper are first shortlisted. novel Dynamic extension (DFFM) is then put forward assuming existence material time interval that related coalescence period microcracks upon macroscopic failure. On basis, DFFM model investigated case one-to-one relation between external solicitation field release rate holds true. Under such condition, also validated against suitable experimental data on rock materials from literature proven properly catch increase load as rises, proving technique for modelling dependence quasi-brittle materials.