This paper presents several improvements to the marching triangles algorithm for general implicit surfaces. The original method generates equilateral triangles of constant size almost everywhere on the surface. We present several modifications to adapt the size of the triangles to the curvature of the surface. As cracks may arise in the resulting polygonization, we propose a specific crack-clos...

A model is presented for the dynamic finite element analysis of ceramic microstructures subjected to multi-axial dynamic loading. This model solves an initial-boundary value problem using a multi-body contact scheme integrated with interface elements to simulate microcracking at grain boundaries and subsequent large sliding, opening and closing of interfaces. A systematic and parametric study o...

Phase-field models are a leading approach for realistic fracture problems. They treat the crack as second phase and use gradient terms to smear out faces, enabling of standard numerical methods simulations. This regularization causes cracks occupy finite volume in reference, leads inability appropriately model closing or contacting -- without healing faces. Specifically, classical idealized fac...

Over the years, aligning IT and business strategies has remained an important, but sometimes elusive, challenge for executives. At the same time it has garnered quite an interest among the research community. This paper seeks to provide one explanation why alignment efforts struggle. The paper first addresses the distinction between strategies as plans and strategies as patterns in decisions an...

in the diesel engine exhaust gas recirculation (egr) components, valve and connecting pipes are the critical components and fails often during new engine development. these components are important for meeting nox emissions norms. therefore design of these components should remain robust. but the challenge in design is compact packaging of complete egr components on the engine consequently vibr...

A novel method for preparing and testing bending specimens in-situ the TEM has been developed. This method provides high visibility of the crack front and its associated plastic zone. This is significant because energy release rates can now be calculated at many points throughout the test based on crack tip opening displacement (CTOD), crack opening angle (COA), and crack advance. Further refin...

In this work, the plastic deformation mechanisms responsible for mechanical properties and fracture toughness in nanotwinned (NT) magnesium is studied by molecular dynamics (MD) simulation. The influence of twin boundary (TBs) spacing and crack position on deformation behaviors are investigated. The microstructure evolution at the crack tip are not exactly the same for the left edge crack (LEC)...

In previous work we presented a methodology for designing a trading agent when several tradeoffs are present. In this paper we expand this methodology to include design decisions based on Bayes-Nash equilibria that we compute for subproblems of the original problem. In particular we compute Bayes-Nash equilibria for first price single unit auctions and m price multi unit auctions, when the auct...