Results 61 to 70 of about 51,985 (289)
Research on borehole stability of shale based on seepage-stress-damage coupling model [PDF]
Fracture and Structural Integrity, 2014 In oil drilling, one of the most complicated problems is borehole stability of shale. Based on the theory of continuum damage mechanics, a modified Mohr-Coulomb failure criterion according to plastic damage evolution and the seepage-stress coupling is ...
Xiaofeng Ran, Yuezhi Wang, Shanpo Jia
doaj +1 more source
Materials, 2023 Due to the unique structure of tensile sheet specimens with a circular hole (CHS specimen), a novel method is proposed to predict the large-range uniaxial stress-strain relations of elastic-plastic materials analytically. Based on the energy equivalence principle, a load-displacement semi-analytical model of the CHS specimen is proposed.
Simiao Yu +3 more
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Advanced Engineering Materials, EarlyView.Creep experiments at 900°C on coarse‐grained steel‐ceramic composites containing recycled magnesia reveal that higher ceramic volume fractions significantly enhance the creep resistance. Detailed EBSD investigations identify subgrain formation in the steel matrix as the dominant deformation mechanism.
Moritz Müller +6 more
wiley +1 more source
Evaluation of ductile crack initiation limit using strain hardening exponent
Nihon Kikai Gakkai ronbunshu, 2016 Evaluation of ductile crack initiation limit without depending on materials was investigated. Ductile crack initiation behaviors were experimentally and analytically comprehended using Al alloy as non-ferrous metal in addition to two different steels. It
Takehisa YAMADA +2 more
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On the equivalence of slip-line fields and work principles for rigid–plastic body in plane strain
International Journal of Solids and Structures, 2008 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Khan, I. A. +3 more
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Advanced Engineering Materials, EarlyView.This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff +9 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan +5 more
wiley +1 more source
Yoshida-Uemori model: Improvement of the elastic modulus evolutive model and Springback application [PDF]
MATEC Web of ConferencesToday, a combined hardening model coupled with the elastic evolution modulus which depends on the equivalent plastic strain, called Yoshida-Uemori model, is recommended for an improved springback prediction in stamping numerical simulation.
Lemoine Xavier
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Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading
Advanced Engineering Materials, EarlyView.The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley +1 more source
MetalsThe objective of this study is to develop failure-limit material models for Aluminum 6061-T6, A36 Carbon Steel, 304 Stainless Steel, and Nitronic 60 metals, based on parameters of plastic equivalent strain (failure strain) and stress triaxiality.
Ron Harwell +2 more
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