Paper Title:
Quasi-Brittle Fracture of Lamellar γTiAl: Simulation Using a Cohesive Model with Stochastic Approach
  Abstract

Quasi-brittle fracture of fully lamellar two phase (α2+γ)TiAl is investigated both experimentally and numerically. Fracture tests are conducted at room temperature, which fail in a quasi-brittle and unstable manner but exhibit significant variations in crack initiation and propagation prior to unstable failure. Fractographic investigations are performed which elucidate the micromechanical causes of the macroscopic behaviour. The observed deformation and fracture behaviours of the specimens are simulated by a finite element model containing cohesive elements for modelling the material separation. In order to capture the scatter of the macroscopic behaviour, a stochastic approach is chosen, in which local variations of cohesive parameters are taken into account. The model can describe and explain the physical phenomena of the specific material.

  Info
Periodical
Key Engineering Materials (Volumes 324-325)
Edited by
M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz
Pages
1317-1320
DOI
10.4028/www.scientific.net/KEM.324-325.1317
Citation
R. Kabir, A. Cornec, W. Brocks, "Quasi-Brittle Fracture of Lamellar γTiAl: Simulation Using a Cohesive Model with Stochastic Approach ", Key Engineering Materials, Vols. 324-325, pp. 1317-1320, 2006
Online since
November 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Min Chul Kim, Jae Bong Lee, Yong Jun Oh, Bong Sang Lee
Abstract:The critical fracture stresses (σ* f(sp)) in various low alloy steels for a reactor pressure vessel(RPV) were evaluated by a small punch...
416
Authors: Jan G.M. van Mier, Dominik Meyer, Hau Kit Man
Abstract:Fracture under compression is one of the most commonly studied properties of geomaterials like concrete and rock, in particular since these...
207
Authors: Zahid R. Khokhar, Ian A. Ashcroft, Vadim V. Silberschmidt
Abstract:Fibre reinforced polymer composites (FRPCs) are being increasingly used in structural applications where high specific strength and stiffness...
13
Authors: M.R.M. Aliha, Mahdi Rezaei
Abstract:Crack growth path was investigated experimentally, numerically and theoretically using two test specimens subjected to pure mode II loading....
159
Authors: Cui Fang Duan, Wei Li, Ji Liang Zhang
Chapter 4: Material Engineering and its Application Technology
Abstract:This article studies aluminum alloy plate through 16 to 3mm thick with a hole under room temperature fracture test. The experimental results...
315