Results 51 to 60 of about 6,221 (226)

Formulation and existence of weak solutions for a problem of adhesive contact with elastoplasticity and hardening

Advances in Mechanical Engineering, 2021
This paper presents the weak formulation of a quasi-static evolution model for two deformable bodies with uni-directional adhesive unilateral contact on which external loads act.
Ramiro Peñas Galezo
doaj   +1 more source

Optimal control of an abstract evolution variational inequality with application to homogenized plasticity [PDF]

Journal of Nonsmooth Analysis and Optimization, 2020
The paper is concerned with an optimal control problem governed by a state equation in form of a generalized abstract operator differential equation involving a maximal monotone operator.
Hannes Meinlschmidt, Christian Meyer, Stephan Walther   +2 more
doaj   +1 more source

Deep Learning Approaches for Classifying Crack States With Overload and Predicting Fatigue Parameters in a Titanium Alloy

Advanced Intelligent Systems, EarlyView.
This study proposes a deep learning approach to evaluate the fatigue crack behavior in metals under overload conditions. Using digital image correlation to capture the strain near crack tips, convolutional neural networks classify crack states as normal, overload, or recovery, and accurately predict fatigue parameters.
Seon Du Choi, Suman Timilsina, Youn Woo Shin, Yong Nam Kwon, Kee‐Sun Sohn, Ji Sik Kim   +5 more
wiley   +1 more source

Review and prospects of shear test of bolted rock joints

Deep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren, Fan Yang, Manchao He, Yong Yuan, Zhigang Tao   +4 more
wiley   +1 more source

Finite-strain formulation and FE implementation of a constitutive model for powder compaction

, 2014
A finite-strain formulation is developed, implemented and tested for a constitutive model capable of describing the transition from granular to fully dense state during cold forming of ceramic powder.
Bigoni, D., Piccolroaz, A., Stupkiewicz, S.   +2 more
core   +1 more source

Modeling and experimental validation of bolt–grout bond–slip behavior for deep underground excavation support

Deep Underground Science and Engineering, EarlyView.
A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian, Xiaohui He, Kexue Wang, Yufei Wu, Guoxin Wang, Shaochen Zhang, Jun Yang   +6 more
wiley   +1 more source

Analysis of Tunnel Deformation Using Elastoplastic Stillinger Weber (SW) Potential Embedded Discretized Virtual Internal Bond (DVIB) Method

Applied Sciences
Tunnel deformation induced by excavation in brittle and quasi-brittle rock masses involves complex interactions among stress redistribution, plastic deformation, and fracture evolution.
Dina Kon, Shu Jisen, Alphonse Kakanda, Dave Mbako   +3 more
doaj   +1 more source

Analytical stress solution framework for lined compressed air energy storage chambers and its application to safe burial depth determination and supporting effectiveness evaluation

Deep Underground Science and Engineering, EarlyView.
An analytical framework delivers a closed‐form stress solution for lined compressed air energy storage chambers, enabling the determination of the minimum safe burial depth. The solution quantitatively evaluates lining support effectiveness, offering a reliable tool for chamber design and optimization.
Zeyuan Sun, Cheng Zhao, Jinquan Xing, Qinyuan Luo   +3 more
wiley   +1 more source

An elastoplastic theory of dislocations as a physical field theory with torsion

, 2002
We consider a static theory of dislocations with moment stress in an anisotropic or isotropic elastoplastical material as a T(3)-gauge theory. We obtain Yang-Mills type field equations which express the force and the moment equilibrium.
Abrikosov A A, Barut A O, Bilby B A, Cartan É, Edelen D G B, Edelen D G B, Eringen A C, Eshelby J D, Eshelby J D, Frankel T, Gairola B K D, Gairola B K D, Golebiewska-Lasota A A, Gronwald F, Gutkin M Yu, Hamermesh M, Hehl F W, Hehl F W, Hirth J P, Kadic A, Katanaev M O, Kondo K, Kosevich A M, Kröner E, Kröner E, Kröner E, Kröner E, Kröner E, Kröner E, Kröner E, Kröner E, Kröner E, Marsden J E, Maugin G A, Nabarro F R N, Nye J F, Peierls R E, Puntigam R A, Rogula D, Schaefer H, Seeger A, Trautman A, Trautman A, Trebin H-R, Trzesowski A   +44 more
core   +1 more source

The Impact of Elastoplastic Deformation Behavior on the Apparent Gas Permeability of Deep Fractal Shale Rocks

Fractal and Fractional
Deep shale gas reservoirs are vital sources of unconventional natural gas and present unique challenges for exploration and development due to their multiscale flow characteristics and elastoplastic deformation behavior of reservoir rocks.
Xu Zhou, Zhaoqin Huang, Aifen Li, Jun Yao, Xu Zhang   +4 more
doaj   +1 more source