BACKGROUND Zirconia materials are known for their optimal aesthetics, but they are brittle, and concerns remain about whether their mechanical properties are sufficient for withstanding the forces exerted in the oral cavity. Therefore, this study compared the maximum deformation and failure forces of titanium implants between titanium-alloy and zirconia abutments under oblique compressive force...

To investigate the influence of hydration on brittle deformation oceanic crustal rocks, we conducted triaxial experiments gabbroic rocks with various degrees at a confining pressure 20 MPa and room temperature, measuring elastic wave velocity. Hydrated olivine gabbros reached maximum differential stress 225–350 MPa, which was considerably less than those recorded for (~450 MPa), but comparable ...

Deformation brings out important features of viscoelastic behaviour in polymers. To achieve a better understanding of the underlying phenomena, molecular dynamics simulations have been performed for oneand two-phase polymeric materials created on the computer. An external force was applied to the materials and their response followed as a function of time. The mechanical properties were found t...

While hydrogen embrittlement of ferritic steels has been a subject of significant research, one of the major challenges in tackling hydrogen embrittlement is that the mechanism of embrittlement is not fully resolved. This paper reports new observations and interpretation of fracture surface features and deformation microstructures underneath the fracture surface, providing a mechanistic view of...

Rupture events, as the propagation of cracks or the sliding along faults, associated with the deformation of brittle materials are observed to obey power-law distributions. This is verified at scales ranging from laboratory samples to the Earth’s crust, for various materials and under various loading modes. Besides the claim that this is a universal characteristic of the deformation of heteroge...

Abstract In their temperature window of application, TiAl alloys typically fail in a semi-brittle manner. For this material class, the Griffith concept, developed initially for ideal brittle materials, has to be adapted by additional dissipative contributions fracture resistance: plastic deformation, crack bridging, work deform and shear ledges, bifurcation. These terms resistance induce pronou...