A theoretical framework is developed for the notched strength of ceramic composites that exhibit rising fracture resistance. It is based on established concepts of crack stability under stress-controlled loadings. On using a linear representation of the resistance curve (expressed in terms of an energy release rate), straightforward analytical solutions are obtained for the strength as well the...

Abstract In the last decade, Additive Manufacturing (AM) technologies have been considered by both automotive and aerospace industries for production of end-use metallic parts, with a main focus on Powder Bed Fusion – Laser Beam / (PBF-LB/M) technologies. However, AM parts present features that are deleterious to their cyclic properties. For reliable design in terms fatigue strength, existing i...

Hydride formation in Zircaloy-4 under cyclic thermomechanical loading has been investigated using characterized notched beam samples four-point testing, and microstructurally-representative crystal plasticity modelling of the tests which incorporates an atomistically-informed equilibrium-state model for hydrogen concentration. The provided locations within microstructure high content, above tha...

We recently developed a method to measure cortical bone fracture initiation toughness using a double-notched beam in four-point bending. This method was used to test the hypothesis that mineralization around the two notch roots is correlated with fracture toughness and crack extension (physical damage). Total energy absorbed to failure negatively correlated with average mineralization of the be...

Considering the case of fabricating a UHSFRC (ultra-high strength fiber-reinforced concrete) beam with the method of one end placing and self-flowing to the other end, it was intended to simulate the variation of the fiber orientation distribution according to the flow distance and the variation of the resultant tensile behaviors. Then the validity of the simulation approach was shown by compar...

Cohesive zone models are commonly used to numerically model fracture phenomena on the microscale. Typical processes described experimentally via Double Cantilever Beam (DCB) test and End Notched Flexure (ENF) macroscale. Analytical solutions, e.g. LEFM-based beam theory, evaluate these tests validate numerical models. However, some input parameters of cohesive models, i.e. stiffness strength, i...

The concrete structure in the coastal area suffers from combined erosion of sulfate and dry–wet cycles. In this study, order to modify ordinary concrete, fly ash, slag powder, silica fume polyester fiber are added separately. crack resistance was studied through mechanical performance test three-point bending fracture notched beam under load-crack opening displacement (P-CMOD) curve characteris...

Fracture toughness is an important property that characterizes a material’s brittleness or resistance to fracture. Although some fracture toughness test methods have been refined and even standardized, many researchers have continued to use the Vickers indentation crack length method as an expedient. In this paper, Vickers indentation fracture resistance data for Standard Reference Material SRM...