Results 71 to 80 of about 172,289 (277)

Size Effect in Fracture: Roughening of Crack Surfaces and Asymptotic Analysis

, 2002
Recently the scaling laws describing the roughness development of fracture surfaces was proposed to be related to the macroscopic elastic energy released during crack propagation [Mor00].
A. B. Mosolov, A. Carpinteri, A. S. Balankin, E. Bouchaud, E. Bouchaud, E. Bouchaud, Elisabeth Bouchaud, F. M. Borodich, F. Plouraboué, Gérard Valentin, J. M. López, J. M. López, J. Schmittbuhl, M. Hori, M. Kachanov, R. H. Dauskardt, S. Das Sarma, S. Morel, S. Morel, Stéphane Morel, T. Engøy, W. Weibull, Z. P. Bažant, Z. P. Bažant, Z. P. Bažant, Z. P. Bažant, Z. P. Bažant   +26 more
core   +1 more source

Investigation of Laser Ablation and Brush Pre‐Treatments for AlCu Cold Roll Bonding in Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti, Finn‐Lennard Janthur, Selina Raumel, Sascha Jan Zimmermann, Sarah Seffer, René Gustus, Sebastian Herbst, Marc C. Wurz, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Florian Nürnberger   +11 more
wiley   +1 more source

Cleaved surface of i-AlPdMn quasicrystals: Influence of the local temperature elevation at the crack tip on the fracture surface roughness [PDF]

, 2006
Roughness of i-AlPdMn cleaved surfaces are presently analysed. From the atomic scale to 2-3 nm, they are shown to exhibit scaling properties hiding the cluster (0.45 nm) aperiodic structure.
B. Lawn, D. Bonamy, D. Brunner, F. Family, J. M. Boffa, J. R. Rice, L. Barbier, L. Ponson, M. Feuerbacher, M. Feuerbacher, Y. Yokoyama   +10 more
core   +7 more sources

Fracture propagation in DWT back slotted specimens [PDF]

International Journal of Fracture, 2004
The present paper deals with the measurements of the critical Crack Tip Opening Angle by using an instrumented test. There is a comparison between the analysis of results made by a well known kinematic model and those given by finite element analysis based on a cohesive model for node release.
Fonzo, A, SALVINI, PIETRO, Di Biagio, M.
openaire   +2 more sources

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source

Impacts of geomechanical damage on waterflood-induced fracture propagation in deeply deposited tight oil reservoirs

Frontiers in Energy Research
Waterflood-induced fractures can enhance the production of deep tight oil reservoirs. However, if waterflood-induced fractures propagate fast, they connect injection wells to production wells earlier, inhibiting the production of tight oil reservoirs. In
Zhenfeng Ding, Chenqi Ge, Zhewei Chen, Dongqi Ji, Yingfeng Peng, Guangming Zhang, Yanan Hou, Jingzhou Zhang   +7 more
doaj   +1 more source

Tribological Performance of 60NiTi Alloy Under Varying Contact Conditions and Elevated Temperatures in Linear Reciprocating Sliding

Advanced Engineering Materials, EarlyView.
This study investigates the tribological response of 60NiTi alloy under dry, water‐lubricated and high‐temperature conditions. The alloy exhibits decreasing wear volume and friction with increasing temperature due to the formation of protective oxide layers. The work clarifies dominant wear mechanisms and demonstrates the suitability of 60NiTi for high‐
Anthony Onyebuchi Okoani, Miguel Angel Selles, Maziar Ramezani   +2 more
wiley   +1 more source

Piezoresistive Monitoring of Carbon Nanomaterial‐Reinforced Epoxy Composites Under Cyclic and Fatigue Loading: A Review

Advanced Engineering Materials, EarlyView.
Carbon nanomaterial‐reinforced epoxy composites exhibit pronounced piezoresistive behavior, enabling intrinsic damage sensing under cyclic and fatigue loading. This review critically compares carbon nanotube and graphene systems, correlating filler content, percolation threshold, and gauge factor with sensing stability and damage evolution.
J. M. Parente, J. Nunes‐Pereira, A. P. Silva, P. N. B. Reis   +3 more
wiley   +1 more source

Horizontal well fracturing technology for reservoirs with low permeability

Petroleum Exploration and Development, 2009
The horizontal well stress distribution and the rock failure criterion constitute a fracture initiation mathematical model, which was solved by the iteration method.
Cai Wenbin, Li Zhaomin, Zhang Xialin, Zhang Bo, Zhang Qi   +4 more
doaj   +1 more source

A Two-Dimensional Theory of Fracture Propagation [PDF]

SPE Production Engineering, 1986
Summary A basic theory of two-dimensional (2D) fracture propagation has been developed with a Lagrangian formulation combined with a virtual work analysis. Fluid leakoff is included by the assumption that an incompressible filtrate produces a piston-like displacement of a compressible reservoir fluid with a moving boundary between the ...
Biot, Maurice A., Masse, L., Medlin, W.L.   +2 more
openaire   +2 more sources