Advances in Fracture and Damage Mechanics X: Selected, Peer by Z. Tonkovic, M. H. Aliabadi

By Z. Tonkovic, M. H. Aliabadi

Advances in Fracture and harm Mechanics X cointains chosen, peer reviewed papers submitted on the tenth overseas convention on Fracture and harm Mechanics which happened in Dubrovnik.

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Extra resources for Advances in Fracture and Damage Mechanics X: Selected, Peer Reviewed Papers from the 10th International Conference on Fracture and Damage Mechanics ... Dubrovnik, C

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Finally, the solution was plotted and compared to former results [1]. 26 Advances in Fracture and Damage Mechanics X Materials and Methods The software Maplesoft Maple V12 was used to solve the system. Al-Qureshi`s work [1] provided all materials constant values and initial parameters necessary. Moreover, the projectile specifications used were from rifle bullets. The mathematical model of the penetration process is divided in three stages. The first represents the initial impact and erosion of the head of the projectile.

It is an alternative to the relatively complex constitutive laws applied in classical continuum mechanics-based models. The simplest models are those involving only elasto-brittle springs. Only this type of model is studied in this contribution. The weak point of using purely brittle springs is the strong dependency of the results on network density. Since the network does not represent any real underlying structure, this dependency is understood as a bias which should be removed. g. by scaling the strengths of elements according to their lengths and a chosen internal length parameter [5] or, as is believed to be effective, by incorporating the material’s inhomogeneities (voids, grains, microcracks), which introduces an internal length as well.

A. De Iorio1,a, Grasso M. 3,c, Penta, F. 4,d, Pucillo, G. le V. Tecchio. it, Keywords: crack growth, rail defect, railway safety. Abstract. Fatigue failures of rails often occur at the rail foot, since the geometry of this zone gives rise to stress concentrations under service loads or defects during rail manufacture and installation. In this paper, the fatigue behavior of cracks at the web/foot region of a rail is analyzed numerically. Analytical models in the literature for a semi-elliptical surface crack in a finite plate assume that the geometry of the front remains semi-elliptical during the whole propagation phase and the ellipse axes do not undergo translations or rotations.

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