modeling techniques IAP 2006 Introduction to classical molecular dynamics: Brittle versus ductile

The paper reports an analytical study on the properties of fracture networks in brittle materials. Micro-deformation gradients are considered random fields and/or scaling fields. Under dynamic crack propagation conditions the possibly fractal properties of the (macro) crack pattern are governed

In civil, aeronautical and naval engineering, in protection from natural hazards, and in micro-electronics and MEMS, and one must ensure an extremely small failure probability, < 10-6. How to do that is adequately understood only for the limiting special cases of perfectly brittle or ductile

Abstract. An experimental procedure is developed to determine the scatter of the macroscopic toughness of brittle materials. First, samples are precracked to obtain a sharp precrack. The toughness is then determined by using a standard three-point flexural test. Digital image cor-relation is used

in the literature are mostly limited to these monolithic configurations. However, there are several excitation conditions and operation environments where the monolithic piezoceramic configurations cannot be used due to their extremely brittle nature. The macro-fiber composite (MFC) piezoceramic configuration

Abstract: Engineering materials such as cast iron and concrete are quasi-brittle materials, and there is a fracture process zone in front of opening crack and it exist micro and macro defect and energy dissipation. The damage development area is simplified into fictitious crack, and its action

Abstract. A multi-scale numerical approach for modeling cracking in heterogeneous quasi-brittle materials under dynamic loading is presented. In the model, a discontinuous crack model is used at macro-scale to simulate fracture and a gradient enhanced damage model has been used at meso

The anelastic deformation of solids is often treated using continuum damage mechanics. An alternative approach to the brittle failure of a solid is provided by the discrete fiber-bundle model. Here we show that the continuum damage model can give exactly the same solution for material failure

the transmission of tensile stress between particles, and once it reaches unity, it is unable to transmit tensile stress, resulting in a macro-crack. Connected macro-cracks lead to complete fragmentation. In this paper we explore the ability of an SPH based damage model to predict brittle fracture of rocks during

Many end-users wish to customize their applications, automating common tasks and routines. Unfortunately, this automation is difficult today — users must choose between brittle macros and complex scripting languages. Programming by demonstration (PBD) offers a middle ground, allowing users