Results 51 to 60 of about 54,625 (266)

Effects of surface oxide layer on fatigue crack propagation properties of submicrometer-thick copper films

Nihon Kikai Gakkai ronbunshu
Fatigue failure involves fatigue crack initiation and propagation processes. In bulk metals, the fatigue crack initiation process is strongly affected by a dissimilar surface layer, while the fatigue crack propagation process is less affected.
Toshiyuki KONDO, Tomoaki MORIKUNI, Koki DATE, Kohji MINOSHIMA   +3 more
doaj   +1 more source

The Crack Propagation Trend Analysis in Ceramic Rolling Element Bearing considering Initial Crack Angle and Contact Load Effect

Shock and Vibration, 2021
Silicon nitride ceramic bearings are widely used for their excellent performance. However, due to their special manufacturing method, cracks will occur on ceramic ball surface, and this initial surface crack will propagate under the action of cyclic ...
Zhe Yuan, Bohan Wang, Chao Liu, Zhan Wang, Xiaochen Zhang, Yu Zhang   +5 more
doaj   +1 more source

A TESSELLATION MODEL FOR CRACK PATTERNS ON SURFACES

Image Analysis & Stereology, 2011
This paper presents a model of random tessellations that reflect several features of crack pattern. There are already several theoretical results derivedwhich indicate that thismodel can be an appropriate referencemodel. Some potential applications are presented in a tentative statistical study.
Mecke, Joseph, Nagel, Werner, Ohser, Joachim, Weiss, Viola   +3 more
openaire   +4 more sources

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

Three-dimensional numerical simulation of factors affecting surface cracking in double-layer rock mass

Frontiers in Earth Science
Stratified rock masses comprise various rocks with different thicknesses, lithologies, and compositions. They exhibit unique cracking morphology and failure modes when subjected to external loads.
Yingjie Xia, Yingjie Xia, Xuan Xue, Xuan Xue, Qi Zhang, Qi Zhang, Jian Chen, Hai Yang   +7 more
doaj   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

Characteristics and mechanism of overlying rock and surface damage in gently inclined thick coal seam mining

Meitan xuebao
In order to scientifically guide the disaster prevention and ecological environment protection of the gently coal seam mining in the west of Ordos Basin, and to realize the green and safe mining of coal.
Xiaoshen XIE, Enke HOU, Bingchao ZHAO, Dong FENG, Pengfei HOU, Weiqiang GUO   +5 more
doaj   +1 more source

Elastic-plastic analysis near the crack surface region on a mode III crack under a pair of point forces

AIP Advances, 2016
The crack line analysis method is used to obtain the near-crack-surface stress field of a mode III crack loaded by a pair of anti-plane point forces in an elastic-perfectly plastic material, which expands the research method from the crack line region to
Feng Huang, Zhijian Yi, Jianyi Gu, Xiaobing He, Chaohua Zhao, Ya Li   +5 more
doaj   +1 more source

Indentation theory on orthotropic materials subjected to a frictional moving punch

Archives of Mechanics, 2014
The present article establishes a general theory of frictional moving contact of orthotropic materials indented by a moving rigid punch with various punch profiles.
Y.T. Zhou, K.Y. Lee, Y.H. Jang
doaj   +1 more source

Identification of a Shiga toxin A‐derived peptide internalized into Gb3 receptor‐bearing cells via interaction with the Shiga toxin B subunit

FEBS Letters, EarlyView.
The process of internalization of the Shiga toxin A subunit via formation of a complex with the Shiga toxin B subunit, which specifically binds to the Gb3 receptor. The peptide is designed to act as a carrier of drugs into cancer cells. Here, we explored the potential of peptides derived from the catalytic A subunit of Shiga toxin (STxA) to be drug ...
Giulia Opassi, João C. Encarnação, Valeria Napolitano, Grzegorz Dubin, Grzegorz Popowicz, Karl Andersson, U. Helena Danielson   +6 more
wiley   +1 more source