Results 1 to 10 of about 86 (81)

Ratcheting Simulation of Additively Manufactured Aluminum 4043 Samples through Finite Element Analysis

Applied Sciences, 2023
This study presents a finite element-based ratcheting assessment of additively manufactured aluminum 4043 samples undergoing asymmetric loading cycles.
M. Servatan, S. M. Hashemi, A. Varvani-Farahani   +2 more
doaj   +1 more source

Ratcheting–Fatigue Damage Assessment of Additively Manufactured SS304L and AlSi10Mg Samples under Asymmetric Stress Cycles

Metals, 2023
The present study aims to investigate the interaction of ratcheting and fatigue phenomena for additively manufactured (AM) samples of SS304L and AlSi10Mg undergoing uniaxial asymmetric stress cycles.
M. Servatan, S. M. Hashemi, A. Varvani-Farahani   +2 more
doaj   +1 more source

Local Ratcheting at the Notch Region of Non-Press-Fitted and Press-Fitted Al 7075-T6 Samples Undergoing Asymmetric Stress Cycles

Metals, 2023
The present study evaluated the ratcheting response of notched and press-fitted Al 7075-T6 specimens under stress-controlled asymmetric cycles. The degree of the interference fit (DIF) directly influenced the magnitude and the rate of progressive plastic
F. Hatami, A. Varvani-Farahani
doaj   +1 more source

Evaluating the effectiveness of combined hardening models to determine the behavior of a plate with a hole under combined loadings

European Mechanical Science, 2022
Geometrical discontinuities in a material such as holes and notches on machine elements are called as critical regions due to the stress concentrations. They are the potential failure initiation locations Therefore, researchers put significant effort on ...
Toros Arda Akşen, Melih Çaylak, Mehmet Fırat   +2 more
doaj   +1 more source

Effects of calving and submarine melting on steady states and stability of buttressed marine ice sheets

Journal of Glaciology, 2022
Mass loss from ice shelves is a strong control on grounding-line dynamics. Here we investigate how calving and submarine melt parameterizations affect steady-state grounding-line positions and their stability.
Marianne Haseloff, Olga V. Sergienko
doaj   +1 more source

Back-Stress and Its Evolution during Primary Creep in Particle Strengthened Nickel Superalloys

Crystals, 2020
According to Eshelby’s theory, inelastically inhomogeneous inclusions in a metallic matrix give rise to a distribution of internal stresses. In the case of particle strengthened materials, such as nickel base superalloys, the presence and evolution of ...
Sanket Sarkar, Yan Gao, Shenyan Huang, Saswata Bhattacharya, Swapnil Patil, Ramkumar Oruganti   +5 more
doaj   +1 more source

Void Formation during Diffusion – Two-Dimensional Approach

High Temperature Materials and Processes, 2016
The final set of equations defining the interdiffusion process in solid state is presented. The model is supplemented by vacancy evolution equation. The competition between the Kirkendall shift, backstress effect and vacancy migration is considered.
Wierzba Bartek
doaj   +1 more source

Multi-decadal evolution of Crary Ice Rise region, West Antarctica, amid modern ice-stream deceleration

Journal of Glaciology
The ongoing deceleration of Whillans Ice Stream, West Antarctica, provides an opportunity to investigate the co-evolution of ice-shelf pinning points and ice-stream flux variability.
Hannah Verboncoeur, Matthew Ross Siegfried, Nicholas Holschuh, Jeremy Paul Winberry, Duncan Byrne, Wilson Sauthoff, Tyler Clark Sutterley, Brooke Medley   +7 more
doaj   +1 more source

The concurrent ratcheting and stiffness degradation-based damage variable in SA508 steel samples undergoing stress cycles at room and elevated temperatures

Materials Research Express
This study evaluates the interaction between ratcheting and stiffness degradation in SA508 steel samples at various operating temperatures using a combined isotropic-kinematic hardening framework.
M Karimi, A Varvani-Farahani
doaj   +1 more source

Formability of AA7021-T4 Sheet Alloy Under Changing Strain Path Conditions: Experiments and Crystal Plasticity Modeling

Crystals
The formability of AA7021-T4 sheets under changing strain paths was investigated via a novel crystal plasticity model and associated experimentation. The motivation was to advance simulation tools for process design of limited-ductility 7xxx alloys, with
Md. Zahidul Sarkar, Joshua Lim, Sarah Sanderson, David T. Fullwood, Marko Knecevic, Michael P. Miles   +5 more
doaj   +1 more source