The Open Materials Science Journal最新文献_第2页

Constitutive Modelling for Anisotropic Damage in Woven E-Glass Reinforcements 编织e -玻璃增强材料各向异性损伤的本构模型研究

The Open Materials Science Journal Pub Date : 2017-04-28 DOI: 10.2174/1874088X01711010009

Ping Yang, Y. Tong

{"title":"Constitutive Modelling for Anisotropic Damage in Woven E-Glass Reinforcements","authors":"Ping Yang, Y. Tong","doi":"10.2174/1874088X01711010009","DOIUrl":"https://doi.org/10.2174/1874088X01711010009","url":null,"abstract":"Abstract: It is easy for composite laminates to be damaged by relative lower velocity impact which could give rise to internal delamination that will strongly weaken the compressive strength of laminates. In order to predict the occurrence of matrix failure, the elastic-brittle behaviors of fiber-reinforced composites were modeled constitutively by an anisotropic damage model. The dynamic tensile testing was performed at a constant velocity of 2 mm/min until the sample broke to achieve the mechanical parameters of Eglass reinforcements. The elastic constitutive equation and the constitutive damage model were obtained on basis of the fundamental theory of mechanics about the orthotropic constitutive of reinforcements. The methodology for this constitutive model which is developed by Hashin considered both the effect of fiber and matrix failure. Then, the developed constitutive equations were incorporated into the FE (finite element) codes, ABAQUS, through the user subroutine module to simulate the process of projectile impacting GFRP composite laminates. The results show that the material deformation reaches a maximum at 24 μs, then occurs rebound with the increase of the time. The stress of reinforcements traverse section linearly increases outward from 0 MPa to 509.8 MPa. Material damage area increases with the prolonging of time, and for a fixed time, material damage gradually increases from the edges to the center and reaches a constant value of 1, which means the rupture of the damage process.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"18 1","pages":"9-21"},"PeriodicalIF":0.0,"publicationDate":"2017-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81415126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave-Assisted Synthesis of Pd Nanoparticles and Catalysis Application for Suzuki Coupling Reactions 微波辅助合成纳米钯及其在铃木偶联反应中的催化应用

The Open Materials Science Journal Pub Date : 2017-02-28 DOI: 10.2174/1874088X01711010001

Jian Zhang, X. Bai

引用次数: 3

Book Review on Future Trends for TOP Materials TOP材料未来趋势书评

The Open Materials Science Journal Pub Date : 2016-10-31 DOI: 10.2174/1874088X01610010101

N. Allen

引用次数: 0

Oxide Spallation during Post-Isothermal High Temperature Oxidation Cooling of Cr-rich Cast Alloys highly alloyed with Hf 高含Hf富cr铸造合金等温后高温氧化冷却过程中的氧化物剥落

The Open Materials Science Journal Pub Date : 2016-09-30 DOI: 10.2174/1874088X01610010089

E. Conrath, P. Berthod

引用次数: 2

Characteristic Analysis and Applications of Electromagnetic Shielding Materials for Wireless Communications Device 无线通信设备电磁屏蔽材料的特性分析及应用

The Open Materials Science Journal Pub Date : 2016-07-15 DOI: 10.2174/1874088X01610010044

Han-Nien Lin, Yafeng Chen, Hung-Yun Tsai, Min-Shan Lin

{"title":"Characteristic Analysis and Applications of Electromagnetic Shielding Materials for Wireless Communications Device","authors":"Han-Nien Lin, Yafeng Chen, Hung-Yun Tsai, Min-Shan Lin","doi":"10.2174/1874088X01610010044","DOIUrl":"https://doi.org/10.2174/1874088X01610010044","url":null,"abstract":"Abstract: As the trend of consumer electronics and mobile communications devices is obviously developing toward to miniature and high-speed processing, the problem involving with electromagnetic compatibility (EMC) or radio frequency interference (RFI) is becoming more critical for the system integration of high-speed digital and RF mixed signal platforms. This paper is mainly focusing on the characteristics analysis of various electromagnetic shielding materials by utilizing the various shielding effectiveness (SE) measuring methods developed by TDK and ASTM (ASTM D4935). We also adopt the electromagnetic interference (EMI) testing methods developed by IEC for chip level (IEC 61967-3 and IEC 61967-6) to investigate the characteristics and distribution of EMI noise sources. To effectively shield the electric, magnetic, or electromagnetic field originated from noise source, we thus analyze the shielding capability for various materials with different measuring methods. Finally, we will show the EMI reduction and RF performance improvement with implementation of shielding material on module under investigated. With the systematic measurement and analysis described in this paper, we can further identify the related EMI problem and resolve the severe chip or module level EMC problem more effectively.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"20 1","pages":"44-53"},"PeriodicalIF":0.0,"publicationDate":"2016-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87621483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

To Design a Cascode LNA by Using Channel-Length-Split Device with Constant-gm in a 0.35 μm Silicon CMOS Technology 在0.35 μm硅CMOS工艺中，采用恒定gm的通道长度分割器件设计Cascode LNA

The Open Materials Science Journal Pub Date : 2016-07-15 DOI: 10.2174/1874088X01610010079

Jui-Lin Lai, Ting-You Lin, Cheng-Fang Tai, Rong-Jian Chen

{"title":"To Design a Cascode LNA by Using Channel-Length-Split Device with Constant-gm in a 0.35 μm Silicon CMOS Technology","authors":"Jui-Lin Lai, Ting-You Lin, Cheng-Fang Tai, Rong-Jian Chen","doi":"10.2174/1874088X01610010079","DOIUrl":"https://doi.org/10.2174/1874088X01610010079","url":null,"abstract":"Abstract: In the paper, the folded-cascode low-noise operational amplifier (LNA) with constant-gm is proposed and analyzed. The channel-length split technique adopted to expand ratio of W/L of the differential pair transistor to improve the performance of LNA for the gain bandwidth product, noise and offset voltage. The channel-length split method is separated differential input transistor into 2 transistors in series. The area of the transistor (W, L) can be properly increased to effectively decrease the flick noise. The double indirect-frequency compensation technique and the clamping circuit are adopted in amplifier to increase the bandwidth. The proposed two sets input differential pair can be provided a constant-gm value and rail-to-rail swing during the operating region. The floating-point structure is used to reach rail-to-rail swing at output stage. Simulation results show that the gain, constant-gm in input stag, noise, offset-voltage, PSRR, CMRR and ICMR of amplifier are improved. The characteristics of LNA are successfully verified by the TSMC 0.35um 2P4M CMOS technology. There have a great potential in the VLSI implementation used in the portable electronic and bio-medicine product applications.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"16 1","pages":"79-88"},"PeriodicalIF":0.0,"publicationDate":"2016-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90171938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Nanocontact Printing of Aminosilane for Bio-Device Fabrications 用于生物器件制造的氨基硅烷纳米接触印刷

The Open Materials Science Journal Pub Date : 2016-07-15 DOI: 10.2174/1874088X01610010070

K. Lam, F. Huang, L. W. Chen

引用次数: 0

PL Intensity and Life-Time Enhancements of the n-GaN Light-Emitting Diode During the Device Fabrication 器件制造过程中n-GaN发光二极管的发光强度和寿命增强

The Open Materials Science Journal Pub Date : 2016-07-15 DOI: 10.2174/1874088X01610010020

Shen-Li Chen, Chin-Chai Chen, Y. Lai, W. Chiang, Hung-Wei Chen

引用次数: 0

The Taste Sensors with Conductivity Measurement 具有电导率测量的味觉传感器

The Open Materials Science Journal Pub Date : 2016-07-15 DOI: 10.2174/1874088X01610010037

Hung-Wei Chen, Yi-Mu Lee, Shen-Li Chen

引用次数: 0

Design Ratio-Memory Cellular Neural Network (RMCNN) in CMOS Circuit Used in Association-Memory Applications for 0.25 mm Silicon Technology 设计用于关联存储器应用的0.25毫米硅制CMOS电路中的比率记忆细胞神经网络(RMCNN)

The Open Materials Science Journal Pub Date : 2016-07-15 DOI: 10.2174/1874088X01610010054

Jui-Lin Lai, Chung-Yu Wu

{"title":"Design Ratio-Memory Cellular Neural Network (RMCNN) in CMOS Circuit Used in Association-Memory Applications for 0.25 mm Silicon Technology","authors":"Jui-Lin Lai, Chung-Yu Wu","doi":"10.2174/1874088X01610010054","DOIUrl":"https://doi.org/10.2174/1874088X01610010054","url":null,"abstract":"Abstract: The paper is proposed the Ratio-Memory Cellular Neural Network (RMCNN) that structure with the self-feedback and the modified Hebbian learning algorithm. The learnable RMCNN architecture was designed and realized in CMOS technology for associative memory neural network applications. The exemplar patterns can be learned and correctly recognized the output patterns for the proposed system. Only self-output pixel value in A template and B template weights are updated by the nearest neighboring five elements for all test input exemplar patterns. The learned ratio weights of the B template are generated that the catch weights are performed the summation of absolute coefficients operation to enhance the feature of recognized pattern. Simulation results express that the system can be learned some exemplar patterns with noise and recognized the correctly pattern. The 9×9 RMCNN structure with self-feedback and the modified Hebbian learning algorithm is implemented and verified in the CMOS circuits for TSMC 0.25 μm 1P5M VLSI technology. The proposed RMCNN have more learning and recognition capability for the variant exemplar patterns in the auto-associative memory neural system applications.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"30 1","pages":"54-69"},"PeriodicalIF":0.0,"publicationDate":"2016-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73710541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2