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Total 154 results found since Jan 2013.

Determination of uniaxial large-strain workhardening of high-strength steel sheets from in-plane stretch-bending testing
Publication date: May 2017 Source:Journal of Materials Processing Technology, Volume 243 Author(s): Gustavo Capilla, Hiroshi Hamasaki, Fusahito Yoshida This paper proposes a novel approach to determining the large-strain uniaxial stress-strain curves of sheet metals by using in-plane stretch-bending test data. In this approach, a stress-strain curve given by uniaxial tension is extrapolated by a constitutive equation of the combined Swift and Voce laws. The weighting coefficient in the combined Swift-Voce equation is determined by minimizing the difference in the stretch-bending mechanical responses, i.e., punch stroke (o...
Source: Journal of Materials Processing Technology - December 22, 2016 Category: Materials Science Source Type: research

Performance on CI Engine Fuelled Honge Biodiesel Blended with Diesel
Publication date: 2016 Source:Materials Today: Proceedings, Volume 3, Issue 10, Part B Author(s): D Noel, Venkata Ramesh Mamilla, Y. Bharat Kumar, V. Trinath Present work includes preparation of HOME by honge oil and blending it with the diesel to use as CI engine fuel. Performance tests were carried out on single cylinder four stroke water cooled CI engine connected to an eddy current dynamometer with different percentage of HOME blended with the diesel at variable loads and constant rated speed. And found that H20 & H40 blends have relatively higher BTHE as that of neat diesel similarly volumetric efficiency of ...
Source: Materials Today: Proceedings - December 9, 2016 Category: Materials Science Source Type: research

Magnetic resonance imaging detection of multiple ischemic injury produced in an adult rat model of minor stroke followed by mild transient cerebral ischemia
ConclusionWithin regions adjacent to an experimental minor stroke, a recurrence of a mild transient cerebral ischemia augmented T2 above increases produced by tMCAO alone, reflecting increased damage in this region. Exacerbation appeared broader with acute versus chronic recovery between insults.
Source: Magnetic Resonance Materials in Physics, Biology and Medicine - November 3, 2016 Category: Materials Science Source Type: research

Fouling of submerged hollow fiber membrane filtration in turbulence: Statistical dependence and cost-benefit analysis
Publication date: 1 January 2017 Source:Journal of Membrane Science, Volume 521 Author(s): Masoud Pourbozorg, Tian Li, Adrian Wing-Keung Law In the present study, we expanded the scope to a full range of turbulence conditions with a total of 79 experiments, to establish the statistical dependence between the energy consumption due to turbulence dissipation and improved productivity with reduced membrane fouling so that the cost-benefit tradeoff can be evaluated. The turbulence was generated by vibrating perforated plates. Increasing vibration frequency/stroke or solidity of the perforated plate resulted in more intense tu...
Source: Journal of Membrane Science - September 9, 2016 Category: Materials Science Source Type: research

Constitutive equation for the hot deformation behavior of Csf/AZ91D composites and its validity for numerical simulation
Publication date: Available online 21 August 2016 Source:Mechanics of Materials Author(s): Zhenjun Wang, Lehua Qi, Gui Wang, Hejun Li, Matthew S. Dargusch The flow stress behavior of 10 vol. % short carbon fibers reinforced AZ91D composites (Csf/AZ91D) were investigated by hot compression test. The results show the flow stress reach the peak value at small strain and then decrease monotonically until the end of the large strain, which exhibits an obvious dynamic strain softening. The decrease of stress level with deformation temperature increasing or strain rate decreasing can be represented by Zener-Hollomon parameter in...
Source: Mechanics of Materials - August 21, 2016 Category: Materials Science Source Type: research

Human astrocytic grid networks patterned in parylene-C inlayed SiO2 trenches.
Abstract Recent literature suggests that glia, and in particular astrocytes, should be studied as organised networks which communicate through gap junctions. Astrocytes, however, adhere to most surfaces and are highly mobile cells. In order to study, such organised networks effectively in vitro it is necessary to influence them to pattern to certain substrates whilst being repelled from others and to immobilise the astrocytes sufficiently such that they do not continue to migrate further whilst under study. In this article, we demonstrate for the first time how it is possible to facilitate the study of organised ...
Source: Biomaterials - August 3, 2016 Category: Materials Science Authors: Jordan MD, Raos BJ, Bunting AS, Murray AF, Graham ES, Unsworth CP Tags: Biomaterials Source Type: research

(412) Patient with altered mental status, an intrathecal pump, and an unknown dose of ziconotide
72 year old female with past medical history hypertension, CKD, depression, anxiety, remote history of delirium with psychosis during hospitalization, and chronic pain with intrathecal pump presented with altered mental status. Patient underwent CT head which did not show an acute stroke. Patient was treated for UTI early during her hospitalization without improvement in her confusion. An EEG did not show seizure activity or epileptiform discharges and an MRI did not show acute abnormalities. The primary team subsequently obtained a history of cognitive decline over the past 2-3 months that began shortly after the initiati...
Source: The Journal of Pain - March 31, 2016 Category: Materials Science Authors: K. Noon, T. Furnish Source Type: research

Optimization of a reshaping rivet to reduce the protrusion height and increase the strength of clinched joints
Publication date: August 2016 Source:Journal of Materials Processing Technology, Volume 234 Author(s): Chao Chen, Shengdun Zhao, Xiaolan Han, Minchao Cui, Shuqin Fan Conventional mechanical clinching attracted more and more attentions in recent years, but the application of mechanical clinching might be restricted because of the exterior protrusion above the sheets which could affect the performance of clinched joint. In order to reduce the protrusion height and increase the strength of clinched joints, a new method using a reshaping rivet to reshape the clinched joint was proposed in this paper. In the reshaping pr...
Source: Journal of Materials Processing Technology - March 13, 2016 Category: Materials Science Source Type: research

Tribocorrosion behavior of hot pressed CoCrMo alloys in artificial saliva
Publication date: May 2016 Source:Tribology International, Volume 97 Author(s): M. Buciumeanu, A. Bagheri, J.C.M. Souza, F.S. Silva, B. Henriques The aim of this work was to investigate the influence of the processing conditions on the tribocorrosion behavior of hot pressed CoCrMo biomedical alloys. Several samples were processed as a function of different processing temperatures (900, 1000 and 1100°C) and times (10, 30 and 60min). Tribocorrosion tests were carried out in artificial saliva at 37°C, under 1N normal load, 1Hz frequency and 3mm stroke length. Open circuit potential was measured. The worn surfaces wer...
Source: Tribology International - February 20, 2016 Category: Materials Science Source Type: research

Dimensional accuracy of tubes in cold pilgering
Publication date: May 2016 Source:Journal of Materials Processing Technology, Volume 231 Author(s): Hideaki Abe, Tetsuya Iwamoto, Yoshiaki Yamamoto, Satoru Nishida, Ryosuke Komatsu The effects of process conditions on the dimensional accuracy of tubes in cold pilgering were studied. The dimensions included the ovalities of the outer and inner diameters and the eccentricity ratio of the wall thickness. The permissible variations of the dimensions on the objective tubes were of 10μm order. The process conditions included the feed rate (1.0, 1.5, 2.0, and 2.5mm/stroke), stroke speed (140, 180, and 200 strokes/min), an...
Source: Journal of Materials Processing Technology - January 12, 2016 Category: Materials Science Source Type: research

Implantable Graphene-based Neural Electrode Interfaces for Electrophysiology and Neurochemistry in In Vivo Hyperacute Stroke Model
ACS Applied Materials & InterfacesDOI: 10.1021/acsami.5b08327
Source: ACS Applied Materials and Interfaces - December 31, 2015 Category: Materials Science Authors: Ta-Chung Liu, Min-Chieh Chuang, Chao-Yi Chu, Wei-Chen Huang, Hsin-Yi Lai, Chao-Ting Wang, Wei-Lin Chu, San-Yuan Chen and You-Yin Chen Source Type: research

Tissue plasminogen activator followed by antioxidant-loaded nanoparticle delivery promotes activation/mobilization of progenitor cells in infarcted rat brain.
Abstract Inherent neuronal and circulating progenitor cells play important roles in facilitating neuronal and functional recovery post stroke. However, this endogenous repair process is rather limited, primarily due to unfavorable conditions in the infarcted brain involving reactive oxygen species (ROS)-mediated oxidative stress and inflammation following ischemia/reperfusion injury. We hypothesized that during reperfusion, effective delivery of antioxidants to ischemic brain would create an environment without such oxidative stress and inflammation, thus promoting activation and mobilization of progenitor cells i...
Source: Biomaterials - December 18, 2015 Category: Materials Science Authors: Petro M, Jaffer H, Yang J, Kabu S, Morris VB, Labhasetwar V Tags: Biomaterials Source Type: research

Damage analysis in mechanical clinching: Experimental and numerical study
Publication date: April 2016 Source:Journal of Materials Processing Technology, Volume 230 Author(s): F. Lambiase, A. Di Ilio A numerical model describing the evolution of ductile damage was developed to predict the onset of fracture during the clinch joining of thin aluminium AA6082-T6 sheets. The damage model was calibrated and validated using instrumented punch-out tests in order to increase the reliability and robustness of the damage parameter. An inverse analysis was performed (by varying the damage parameter) by minimizing the difference between the experimental and numerical prediction concerning the load-strok...
Source: Journal of Materials Processing Technology - December 11, 2015 Category: Materials Science Source Type: research

Code Validation and Development of User Routines for Microstructural Prediction with Qform
Publication date: 2015 Source:Materials Today: Proceedings, Volume 2, Issue 10, Part A Author(s): C. Bandini, B. Reggiani, L. Donati, L. Tomesani Aim of the present work is to validate the metal forming FE code QForm and to develop user routine for the prediction of microstructure evolution in 6XXX aluminum alloys. Preliminary simulations are carried out in order to select optimal friction models and coefficients among the several formulations available in the code. Numerical results are compared to grid-based visioplasticity experiments: the comparison is performed in term of grid deformation at the billet-tools int...
Source: Materials Today: Proceedings - December 4, 2015 Category: Materials Science Source Type: research

A Neuroprotective Sericin Hydrogel As an Effective Neuronal Cell Carrier for the Repair of Ischemic Stroke
ACS Applied Materials & InterfacesDOI: 10.1021/acsami.5b06804
Source: ACS Applied Materials and Interfaces - November 3, 2015 Category: Materials Science Authors: Zheng Wang, Jian Wang, Yang Jin, Zhen Luo, Wen Yang, Hongjian Xie, Kai Huang and Lin Wang Source Type: research