Paper Title:
Development of Toughness Scale Diagram Considering Temperature Dependency
  Abstract

Fracture toughness data from the cleavage resistance test of structural steels often show a large scatter. Geometry dependency as well as the scatter makes it difficult to evaluate appropriate fracture integrity of cracked components. To address these restrictions, several stochastic models have been proposed by Beremin group, Mudry and other researchers while each of them employs specific estimation scheme and micro-mechanical parameters. The purpose of this paper is to investigate applicability of the Weibull stress model in transition temperature regime and to quantify constraint effect among different-sized CT and PCVN specimens. The constituting parameters m and σu are determined at three temperatures by maximum likelihood estimate (MLE) technique in use of FE analysis results and experimental data of PCVN specimens. Also, failure probabilities of PCVN and CT specimens are calculated from the Weibull parameters, which are used for derivation of a prototype of toughness scale diagram. The diagram provides a technical basis to resolve transferability issue in the same material under different temperatures and constraint conditions.

  Info
Periodical
Key Engineering Materials (Volumes 345-346)
Edited by
S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim
Pages
513-516
DOI
10.4028/www.scientific.net/KEM.345-346.513
Citation
H. O. Ko, S. J. Kang, Y. S. Chang, J. B. Choi, Y. J. Kim, M. C. Kim, B. S. Lee, "Development of Toughness Scale Diagram Considering Temperature Dependency", Key Engineering Materials, Vols. 345-346, pp. 513-516, 2007
Online since
August 2007
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: Yan Hua Zhao, Hua Zhang, Wei Dong
Abstract:The wedge splitting (WS) test is now a promising method to perform stable fracture mechanics tests on concrete-like quasi brittle materials....
425
Authors: M. Ziaee, Naghdali Choupani
Abstract:The present research examines analytically and experimentally the mode-I and mode-II and mixed mode-Interlaminar fracture toughness of PAN...
880
Authors: Fang Juan Qi, Jian Li, Zhi Juan Yang, Min Fang
Mechanical Behavior & Fracture
Abstract:Investigation shows that one of the failure modes of HDPE pipe is the crack slowly grows across the thick direction and leads to failure at...
1116
Authors: Zhi Fang Zhao, Qiu Yu Wang, Zhi Hua Yang, Yang Yang
Chapter 1: Civil Engineering
Abstract:The softening curves of four groups specimens with different sizes were obtained by inverse analysis based on the fictitious crack...
64