Results 31 to 40 of about 274,455 (317)

Effect of circular holes on the ratchet limit and crack tip plastic strain range in a centre cracked plate

, 2011
In this paper a centre cracked plate subjected to cyclic tensile loading and cyclic bending moment is considered. The effect of circular holes drilled in the region of the crack tip on the ratchet limit and crack tip plastic strain range is studied ...
Ure, James Michael, James Ure, Haofeng Chen, Chen, Haofeng, Li, Tianbai, Tianbai Li, Weihang Chen, Chen, Weihang   +7 more
core   +1 more source

Why is local stress statistics normal, and strain lognormal?

Materials & Design, 2021
In the present study we elucidate the nature of local strain statistics evolution during tensile deformation in polycrystalline materials. A rate-independent formulation was implemented within a crystal plasticity framework by the means of representative
Jingwei Chen, Alexander M. Korsunsky
doaj   +1 more source

Plastic Strain Curl Theory

, 2004
The main mechanisms for the hardening of metal materials are the multiplication, accumulation and interaction of dislocations. The dislocation density tensor can be decomposed into two parts: one is the plastic strain curl tensor and the other is the ...
夏嵩, 王自强, Xia, S (reprint author), Chinese Acad Sci, LNM, Inst Mech, Beijing 100080, Peoples R China.   +2 more
core   +1 more source

Plastic load evaluation for a fixed tube sheet heat exchanger subject to proportional loading

, 2012
The plastic load of pressurised components can be calculated based on both the twice elastic slope and tangent methods. Both methods are problematic since they rely on parameters that are localised and therefore have a strong dependency on the gradient ...
Behseta, Khosrow, Robert Hamilton, Donald Mackenzie, Khosrow Behseta, Hamilton, Robert, Mackenzie, Donald   +5 more
core   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Thermal effect of plastic dissipation at the crack tip on the stress intensity factor under cyclic loading [PDF]

, 2011
The authors acknowledge Arts et Métiers ParisTech and Fondation Arts et Métiers for the financial support of Paul C. Paris’ stay at LAMEFIP in 2009. The encouragement of Prof. Ivan Iordanoff, Director of LAMEFIP, is acknowledged with thanks.
PARIS, Paul C., T. Palin-Luc, PARIS, Paul Croce, PALIN-LUC, Thierry, RANC, Nicolas, P.C. Paris, PALIN LUC, Thierry, N. Ranc, Paris, Paul   +8 more
core   +1 more source

A Study on Sandstone Damage Model Based on the Correlation Between Energy Dissipation and Plastic Strain

Applied Sciences
The process of rock damage and failure is accompanied by the dissipation of energy and an increase in plastic strain. This study attempts to determine the relationship between dissipated energy and plastic strain in sandstone during the damage and ...
Tianbai Zhou, Xiaoyu Zhang, Yongbo Cai, Long Wang, Qixian Li   +4 more
doaj   +1 more source

Detection of plastic strain using GNSS data of pre- and post-seismic deformation of the 2011 Tohoku-oki earthquake

Earth, Planets and Space, 2020
In general, there are three mechanisms causing crustal deformation: elastic, viscous, and plastic deformation. The separation of observed crustal deformation to each component has been a challenging problem.
Yukitoshi Fukahata, Angela Meneses-Gutierrez, Takeshi Sagiya   +2 more
doaj   +1 more source

PARK(ing) time–How park deficiency affects the biological clock in a Drosophila model of Parkinson's disease

FEBS Letters, EarlyView.
Drosophila park mutants serve as a model for Parkinson's disease. We used this strain to investigate the connection between oxidative stress and the circadian clock mechanism. We showed that increased oxidative stress affects the physiology of pacemaker cells, disrupting their daily structural plasticity. Lack of rhythmic signaling from pacemaker cells
Kamila Zientara, Kinga Skoczek, Elzbieta Pyza, Milena Damulewicz   +3 more
wiley   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source