Results 21 to 30 of about 68,665 (303)

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

Advances 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)

Nihon 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, Yuto SHINOZAKI, Takaki FUJIWARA, Akiyuki TAKAHASHI, Masanori KIKUCHI   +4 more
doaj   +1 more source

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

Materials & 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

Constant amplitude and post-overload fatigue crack growth behavior in PM aluminum alloy AA 8009 [PDF]

, 1992
A recently developed, rapidly solidified, powder metallurgy, dispersion strengthened aluminum alloy, AA 8009, was fatigue tested at room temperature in lab air.
Blankenship C. P., Dawicke D. S., Dutta V. B., Elber W., Gilman P. S., Hawk J. A., McEvily A. J., Piascik R. S., Rao K. T. V., Raybould D., Ritchie R. O., Vecchio R. S., Venkateswara Rao K. T.   +12 more
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Predicting creep-fatigue crack growth rates in Alloy 709 using finite element simulations of plasticity and creep-induced crack closure

MATEC 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, Potirniche Gabriel P., Pugesek Henry, Shaber Nicholas, Taylor Martin, Stephens Robert, Charit Indrajit   +6 more
doaj   +1 more source

Fatigue Crack Growth from Notches: A Numerical Analysis

Applied 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, Manuel Caldas, Fernando Antunes, Ricardo Branco, Pedro Prates   +4 more
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Study on closing and cracking stress calculation method of fractured rock

Frontiers 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, Gang Liu, Changsi Xia, Shaohong Li, Li Li, Dongsheng Zhao, Ling Zhou, Longfei Cheng   +7 more
doaj   +1 more source

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

, 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, R. Bruce Thompson, Stephen D. Holland, Stoychev S.   +3 more
core   +2 more sources

Finite element analysis of plasticity - induced fatigue crack closure using contact elements [PDF]

, 2010
To predict crack opening stresses, contact elements are incorporated into the elastic-plastic finite element analysis of fatigue crack closure. A code using ANSYS Parametric Design Language (APDL) is developed.
Gökçen, Mehmet Gökhan, Kalenderoğlu, Vahan   +1 more
core   +1 more source

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

Metals, 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, Andrei Kotousov, Ricardo Branco   +2 more
doaj   +1 more source