Results 31 to 40 of about 1,750 (215)

RATCHETING OF STAINLESS STEEL 304 UNDER MULTIAXIAL NONPROPORTIONAL LOADING [PDF]

, 2020
Ratcheting tests are conducted on stainless steel 304 under uniaxial, torsional, and combined axial-torsional loading. The ratcheting strain is predicted based on the constitutive theory that incorporates a modified Ohno-Wang kinematic hardening rule and
Kwang S Kim, Rong Jiao, Masao Sakane, Xu Chen   +3 more
core  

Cyclic deformation response of annealed low-carbon steel: Insights from ratcheting and LCF experiments

Journal of Alloys and Metallurgical Systems
Low cycle fatigue (LCF) and ratcheting experiments were carried out on annealed low-carbon steel at room temperature within a laboratory environment, utilising stress and strain control modes.
Surajit Kumar Paul
doaj   +1 more source

Near-tip strain ratchetting and crack growth at elevated temperature [PDF]

International Journal of Fatigue, 2016
Abstract In this work, we have extended our earlier work on the concept of ratchetting strain as a crack driving force (Tong et al., 2013), to examine the crack growth of a nickel-based superalloy at selected temperatures in vacuum under both fatigue and fatigue-creep loading conditions.
Tong, Jie, Cornet, C, Lin, Bing, Lupton, Colin John, Li, HY, Bowen, P, Williams, S, Hardy, M   +7 more
openaire   +3 more sources

Experimental Characterization and Constitutive Modeling of the Effect of Prior Inelastic Strain on the Viscoplastic Behavior of AD730 at 700 °C

Advanced Engineering Materials, EarlyView.
This study shows that superalloys used in aircraft engine disks become much more prone to deformation at high temperatures if they have been strained during manufacturing. This effect increases with the level of prior strain but eventually reaches a limit.
Fabio Machado Alves da Fonseca, Patrick Villechaise, Malik Durand, Arnaud Longuet, Florent Coudon, Loïc Signor, Julien De Jaeger, Dominique Eyidi, Nathalie Bozzolo, Jonathan Cormier   +9 more
wiley   +1 more source

Influence of Dynamic Strain Aging on Ratcheting Deformation Behavior of SA333 Gr-6 Steel

, 2022
SA333 Gr-6 steel is a candidate material for the primary cooling system in nuclear power plants. During service, piping components experience asymmetrical stress or strain cycling, resulting in plastic strain accumulation and a drastic reduction in ...
Bar, H N, Kumar, G, Kumar, A
core   +1 more source

High Center‐of‐Mass, Multi‐Legged Soft Robots Powered by Geometrically Encoded Liquid Crystal Elastomer Arc Appendages

Advanced Materials, EarlyView.
Inspired by the octopus and the golden wheel spider, soft robots with liquid crystal elastomer arc fibers as appendages are fabricated to transcend surface constraints through an elevated center of mass and minimal contact footprints. By leveraging curvature‐encoded deformation‐recovery cycles, these robots exhibit contractile, torsional, and flexural ...
Jong Bin Kim, Antonio Proctor Martinez, Yaoye Hong, Ziyun Zhang, Kun‐Yu Wang, Shu Yang   +5 more
wiley   +1 more source

An Assessment of Kinematic Hardening Thermal Ratcheting

, 1974
Analytical comparisons are made between the thermal ratcheting response of a kinematic hardening material, a perfectly plastic, and an isotropic hardening material for a two-element assembly.
T. M. Mulcahy
core   +1 more source

A Cyclic Constitutive Model Based on Fractional Derivative for Rate-Dependent Ratcheting of EA4T Axle Steel

Fractal and Fractional
Within the framework of elastoplastic theory, this study develops and improves a fractional cyclic constitutive model capable of describing rate-dependent ratcheting behavior by defining the ratcheting parameter as a function of the cumulative plastic ...
Xuehong Ren, Chenzhuo Qu, Jiujian Wang, Wenjie Zhao, Shaopu Yang, Yongqiang Liu   +5 more
doaj   +1 more source

Programmable Etherified‐Starch Networks Enable Tunable Humidity‐Responsive Soft Actuators for Smart Textiles

Advanced Materials Interfaces, EarlyView.
Programmable etherified‐starch networks enable humidity‐responsive soft actuators with tunable and reversible deformation. By tailoring crosslinking density and structural design, rapid response, controllable actuation, and long‐term stability are achieved.
Dan Zhou, Jieqiong Yao, Kai Kang, Lingfeng Zhu, Zhenfang Zhang, Xin Wei, Yitong Li, Yiwen Zhong, Yingying Zhou, Miao Wang, Ruijun Wu, Yijun Yao, Caijuan Xia, Yang Fu   +13 more
wiley   +1 more source

Evaluation of Sensitivity and Calibration of the Chaboche Kinematic Hardening Model Parameters for Numerical Ratcheting Simulation

Applied Sciences, 2019
Ratcheting failure of materials and structures subjected to low cycle fatigue in the presence of significant mean stress is of great interest to researchers.
Navid Moslemi, Mohsen Gol Zardian, Amran Ayob, Norizah Redzuan, Sehun Rhee   +4 more
doaj   +1 more source