Three-dimensional enriched finite elements are used to compute mixed-mode stress intensity factors (SIFs) for three-dimensional cracks in elastic functionally graded materials (FGMs) that are subject to general mixed-mode loading. The method, which advantageously does not require special mesh configuration/modifications and post-processing of finite element results, is an enhancement of previou...

Brittle fracture during folding of rocks: A finite element study P. Jäger a; S. M. Schmalholz b; D. W. Schmid c; E. Kuhl d a Department of Mechanical Engineering, University of Kaiserslautern, Kaiserslautern, Germany b Geological Institute, Zürich, Switzerland c Physics of Geological Processes, University of Oslo, 0316 Oslo, Norway d Department of Mechanical Engineering, Stanford University, St...

forming limit curve (flc) is an important tool for evaluation of formability of sheet metals subjected to different loading. free bulge of aluminume tubes has been investigated numerically to obtain flc. to verify the numerical results one experimental setup has been manufactured which has the ability of controlling the internal pressure and axial feed. in this study, time and zone of bursting ...

The anisotropic cryogenic ductile and cleavage fracture properties of a body-centered cubic (bcc) steel at −196°C have been investigated under broad spectrum loading conditions, crossing stress triaxiality range from −1/3 to 1.5, along three directions. Fracture is completely impeded in uniaxial compression tests. Conventional brittle behavior only observed high conditions for the bcc steel, on...

The paper discusses the basic issues of local approach to ductile fracture structural metals, with particular emphasis on failure due microvoid development. mechanisms nucleation voids around inclusions and precipitates are characterized. criteria for resulting from cracking existing particles or their separation material matrix presented. Selected results experimental studies Finite Element Me...

x-100 steel is one of the most recently developed materials for production of gas transportation pipelines. this material is severely anisotropic. smooth and notched round bars with different notch radius and flat notched specimens with different notch radius and notch depth in tension are tested to characterize the failure of this material under quasi-static loading condition. triaxiality fact...

The failure due to accidental drop of magnetic recording disks made of brittle or ductile materials is of great interest in the design of small form factor hard disk drives. In this study, fracture of glass disks (brittle material) and plastic deformation of aluminum disks (ductile material) at very high shock levels caused by accidental drop are investigated using finite element analysis. It i...