Results 21 to 30 of about 68,841 (302)

An Experimental Investigation of the Progressive Failure of Sandstone and Its Energy Evolution Characteristics

open access: yesAdvances in Civil Engineering, 2018
In this research study, the progressive failure and energy evolution characteristics of sandstone samples with different sizes were explored under uniaxial and triaxial compression conditions.
Yan Chen, Baohua Guo
doaj   +1 more source

Numerical simulation of fatigue crack propagation with plasticity-induced crack closure under different loading conditions (Development of direct numerical simulation using S-version FEM and simplified method)

open access: yesNihon Kikai Gakkai ronbunshu, 2019
This paper presents two numerical simulation methods for fatigue crack propagations with the plasticity-induced crack closure under arbitrary cyclic loading conditions.
Yuichi SHINTAKU   +4 more
doaj   +1 more source

Effect of residual stress redistribution on fatigue crack growth pertinent to crack closure and applied load

open access: yesMaterials & Design, 2023
Clarifying residual stress (RS) redistribution and its effect on fatigue crack growth (FCG) is essential to evaluate the fatigue life of a welded joint.
Shuai Luan, Chunguo Zhang, Xing Zhang
doaj   +1 more source

Assessment of 3D Short Crack Closure in Ti-6Al-4V Alloy Utilizing Synchrotron X-ray Microtomography [PDF]

open access: yesMATEC Web of Conferences, 2020
Synchrotron X-ray microtomography was utilized to observe the complex 3D crack morphology and the closure behavior of a short crack in Ti-6Al-4V alloy. The aim of the study was to investigate the effect of the crack path evolution on the 3D short crack ...
TUBEI Valary   +5 more
doaj   +1 more source

Fatigue Crack Growth from Notches: A Numerical Analysis

open access: yesApplied Sciences, 2020
A numerical approach based on plastic crack tip opening displacement (CTOD) was followed to study fatigue crack growth (FCG) from notches. The identification of fundamental mechanisms was made considering notched and unnotched models, with and without ...
Micael Borges   +4 more
doaj   +1 more source

Predicting creep-fatigue crack growth rates in Alloy 709 using finite element simulations of plasticity and creep-induced crack closure

open access: yesMATEC Web of Conferences, 2018
This paper reports on a computational study and experimental validation of creep-fatigue crack growth rates at high temperature in two structural materials.
Ramirez Jose   +6 more
doaj   +1 more source

Study on closing and cracking stress calculation method of fractured rock

open access: yesFrontiers in Earth Science, 2023
Determining the characteristic stress intensity according to the rock stress-strain curve is significant significance for rock engineering. Nowadays, there are relatively mature methods for determining peak stress and damage stress.
Yue Qiang   +7 more
doaj   +1 more source

The Evaluation of Front Shapes of Through-the-Thickness Fatigue Cracks

open access: yesMetals, 2021
Fatigue failure of structural components due to cyclic loading is a major concern for engineers. Although metal fatigue is a relatively old subject, current methods for the evaluation of fatigue crack growth and fatigue lifetime have several limitations.
Behnam Zakavi   +2 more
doaj   +1 more source

Measurement of crack opening stresses and crack closure stress profiles from heat generation in vibrating cracks [PDF]

open access: yes, 2008
A method is described to measure crack opening stresses and closure stress profiles of a surface-breaking crack. Vibration is used to generate frictional heat by rubbing crack face asperities.
Jeremy Renshaw   +3 more
core   +2 more sources

Fatigue crack growth in a particulate TiB2 reinforced powder metallurgy iron-based composite

open access: yes, 2003
Fatigue crack growth behavior has been examined in a particulate titanium diboride (TiB2)–reinforced iron-based composite that had been produced via a mechanical alloying process.
Sinclair, I., Yang, N.
core   +1 more source

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