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Items from 1 to 20 out of 33 results

article

Influences of Thickness Ratio of Base Sheets on Formability of Tailor Welded Blanks

Yanli Song, Lin Hua, Y. Song, L. Hua

Procedia Engineering > 2014 > 81 > Complete > 730-735

The influences of thickness ratio of base sheets on formability of tailor welded blanks were examined based on Erichsen cupping tests. Three-dimensional finite element (FE) models, using Hill’48 yield criterion and iso-hardening rule, were built under the environment of the FE analysis software ABAQUS. The failure onset sites of tailor welded blanks were analysed and the quantitative relationships...

article

The stress analysis effect on structural health monitoring in functionally graded shell

Ahmed Raee Madeh, Nabel Kadum Abd-Ali

Diagnostyka > 2022 > Vol. 23, No. 3 > art. no. 222302

The common damage in engineering structures, especially in functionally graded materials, such as failure resulting from fiber breaking or cracking in the matrix or deboning between fibers and matrix, as well as the delamination between the composite material plies and between its layers, may be due to thermal effects, vibration, load concentration as a result of stress and strain for provides information’s...

article

Bearing capacity of rectangular footing on layered sand under inclined loading

V. Panwar, R. K. Dutta

Journal of Achievements in Materials and Manufacturing Engineering > 2021 > Vol. 108, nr 2 > 49--62

Purpose: The study presents the numerical study to investigate the bearing capacity of the rectangular footing on layered sand (dense over loose) using ABAQUS software. Design/methodology/approach: Finite element analysis was used in this study to investigate the bearing capacity of the rectangular footing on layered sand and subjected to inclined load. The layered sand was having an upper layer of...

article

3D numerical study of natural convection heat transfer from a hollow horizontal cylinder placed on the ground

Manoj Kumar Dash, Sukanta Kumar Dash

International Journal of Thermal Sciences > 2019 > 140 > C > 429-441

In the present work, natural convection heat transfer from a thick hollow horizontal cylinder placed on ground is studied numerically. 3D numerical simulations have been performed by varying the Rayleigh number (Ra) from 10 ⁴ to 10 ⁸ (preferably within laminar regime). All the simulations have been carried out by varying length to outer diameter ratio (L/D) and thickness ratio (d/D) in the range...

article

Effect of Thickness Ratio in Piezoelectric/Elastic Cantilever Structure on the Piezoelectric Energy Harvesting Performance

Ga-Yeon Kim, Mahesh Peddigari, Kyung-Won Lim, Geon-Tae Hwang, more

Electronic Materials Letters > 2019 > 15 > 1 > 61-69

The energy harvesting by utilizing the piezoelectric effect for the conversion of oscillatory mechanical energy to useful electrical energy has been promising for self-powered devices. The output power can be controlled by designing the size and shape of the constituents of the harvester. This study demonstrates the effect of Ti plate (elastic layer) thickness on the resonant frequency, neutral axis...

article

Scaling and Performance Analysis of MEMS Piezoelectric Energy Harvesters

Rammohan Sriramdas, Rudra Pratap

Journal of Microelectromechanical Systems > 2017 > 26 > 3 > 679 - 690

Vibrational energy harvesters have been phenomenally adopted to absorb energy from mechanical vibrations and convert them into electrical energy. Power developed by such harvesters depends significantly on material properties and harvester geometry. Moreover, the power generated by micro-scale harvesters scales down rapidly. Hence, it is important to find scaling rules that ensure maximum power generation...

chapter

Research on thickness ratio and multilayers effect on the oil and paper space charge distribution

Bo Huang, Miao Hao, Zhiqiang Xu, George Chen, more

2016 International Conference on Condition Monitoring and Diagnosis (CMD) > 40 - 43

2016 International Conference on Condition Monitoring and Diagnosis (CMD)

Under the HVDC condition, the formation of the space charge in the oil paper system could affect the electric field distribution for converter transformers. Therefore, it is important to analyze the factors that determine the space charge behavior such as the temperature, moisture, electric field, oil paper thickness ratio and multilayers such as (Oil+Paper+Oil+Paper) structure. This paper focuses...

article

Experimental investigation of formability of Al-1050 tailor-welded blanks

Mahmoud E. Abdullah, Ragab K. Abdel-Magied, Mohamed N. Elsheikh

The International Journal of Advanced Manufacturing Technology > 2017 > 89 > 1-4 > 791-801

Tailor-welded blanks (TWBs) are considered one of the important manufacturing methods. By which, a single blank with multi-sheets with different thickness, material, surface conditions, grade, or strength is produced. In this paper, the formability of TWBs is investigated. The base metal used for this study is aluminum (Al-1050) with different thicknesses. A several thicknesses of base metal for instance...

article

An experimental investigation of the formability of low carbon steel tailor-welded blanks of different thickness ratios

Abou Bakr Elshalakany, Shady Ali, T. A. Osman, H. Megaid, more

The International Journal of Advanced Manufacturing Technology > 2017 > 88 > 5-8 > 1459-1473

Cold-rolled low carbon steel sheets of thicknesses ranging from 0.8 to 2 mm were sheets welded together to form a single part before the formability tests. In this study, the formability of the tailor-welded blanks (TWBs) was evaluated in terms of three measures which are limited dome height (LDH), forming limit diagram (FLD), and minimum major strain. In addition to the mechanical properties, the...

article

Effect of thickness ratio on toughening mechanisms of Ta/W multilayers

Ying Zhang, Taoyuan Ouyang, Dawei Liu, Yan Wang, more

Journal of Alloys and Compounds > 2016 > 666 > C > 30-37

In the present work, effect of Ta/W thickness ratio on toughening mechanisms of Ta/W multilayers was investigated. Ta/W multilayers exhibit appreciable toughness and the toughness increase with increasing thickness ratio of Ta/W. Ta/W multilayers with thickness ratio tTa/W < 0.62 exhibit macroscopic crack propagation, higher tTa/W lead to more titled crack propagation and dissipates more energy...

chapter

Calculations of Stainless Steel-Aluminum Alloy Clad Forming Limit

Hongwei Liu, Peng Zhang

Communications in Computer and Information Science > Advanced Research on Electronic Commerce, Web Application, and Communication > 285-290

Base on the Hosford’s higher order yield criteria, the forming limit diagram of clad was developed with M–K theory at the positive strain ratio. The relationship of forming limit with thickness ratio, thickness irregular coefficient and the exponent of yield function were analyzed. The result show that the forming limit of clad material is between those of its component materials, and increases with...

article

Analysis of sandwich rolling with two different thicknesses outer layers based on slab method

H.Y. Wang, X. Li, J. Sun, Z.H. Wang, more

International Journal of Mechanical Sciences > 2016 > 106 > C > 194-208

When the thicknesses of the outer layers are different in sandwich rolling, based on the different kinds of arrangements with the hard and soft materials the thickness ratio of two outer layers is changed differently during the rolling process. After the first analysis of the different outer thicknesses sandwich rolling, the rules for final thickness ratio of the two outer layers are proposed. In...

article

Investigating the effect of double-layer wick thickness ratio on heat transfer performance of loop heat pipe

Shen-Chun Wu, Dawn Wang, Yau-Ming Chen

International Journal of Thermal Sciences > 2014 > 86 > Complete > 292-298

This study investigated the effect of double-layer wick thickness ratio on the heat transfer performance of loop heat pipe (LHP). With the outer layer of the wick being biporous to allow vapor to travel and the inner layer being monoporous to provide capillary force, the wick used in this study eliminated the problems with wick's structural strength and difficulty in vapor release encountered when...

article

Effects of the Thickness Ratio of CrN vs Cr2O3 Layer on the Properties of Double-layered CrN/Cr2O3 Coatings Deposited by Arc Ion Plating

Chang-Ming Shi, Tie-Gang Wang, Zhi-Liang Pei, Jun Gong, more

Journal of Materials Science & Technology > 2014 > 30 > 5 > 473-479

In this study, CrN/Cr ₂ O ₃ double-layered coatings with various thickness ratios of CrN vs Cr ₂ O ₃ layer were prepared by arc ion plating technology. The influences of the thickness ratio of CrN vs Cr ₂ O ₃ layer on the microstructural characteristics as well as the mechanical and tribological properties of the CrN/Cr ₂ O ₃ double-layered...

chapter

Research on structural optimization of the flexible magnetoelectric torque unimorph device

Hong-wei Ji, Zeng-ping Xing, Yi-wei Liu, Xiao-hong Xu, more

2013 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications > 1 - 4

2013 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA)

The giant magnetoelectric (ME) effect origining from the coupling of piezoelectricity and magnetic torque in flexible magnetoelectric torque (MET) unimorph devices has been investigated. The relation between the ME voltage coefficient and the thickness ratio of piezoelectric / elastic layers can be acquired from the experiments. Stainless steel, brass, and aluminum have been used as elastic layer...

article

Characterization of periodic multilayer mirrors optimized for single attosecond pulse reflection

Chengyou Lin, Shujing Chen, Dahe Liu

Optik - International Journal for Light and Electron Optics > 2013 > 124 > 11 > 990-993

Periodic Mo/Si multilayer mirrors with high peak reflectivity and broad reflection band for reflecting single attosecond pulse are designed, by optimizing the thickness ratio between the absorber layer and the bilayer. The reflective characteristics of periodic Mo/Si multilayer mirrors with different thickness ratio are analyzed and compared both in frequency domain and in time domain, for picking...

article

Growth stress evolution in HfO2/SiO2 multilayers

Jingping Li, Ming Fang, Hongbo He, Jianda Shao, more

Thin Solid Films > 2012 > 526 > Complete > 70-73

Growth stress in hafnium oxide/silicon dioxide (HfO ₂ /SiO ₂ ) multilayers was measured in situ to understand the role of the sublayers and the influence of the underlayers' structural features. Experiments using three- and six-layer films were performed by electron-beam evaporation. During deposition, the developing trend of the force per unit width was controlled by changing the...

article

Microstructure; bonding strength and thickness ratio of Al/Mg/Al alloy laminated composites prepared by hot rolling

X.P. Zhang, T.H. Yang, S. Castagne, J.T. Wang

Materials Science & Engineering A > 2011 > 528 > 4-5 > 1954-1960

In this study, 7075 Al/AZ31B Mg/7075 Al laminated composites were prepared by hot roll bonding method. Microstructure and bonding strength of the experimental laminated composites, and thickness ratio of the constituent layers after hot rolling were evaluated. Effects of reduction ratio and rolling temperature on the microstructure, bonding strength and thickness ratio were also studied. Dynamic recrystallization...

article

The crack propagating behavior of composite coatings prepared by PEO on aluminized steel during in situ tensile processing

Zhitong Chen, Guang Li, Zhenqiang Wu, Yuan Xia

Materials Science & Engineering A > 2011 > 528 > 3 > 1409-1414

This paper investigates the in situ tensile cracks propagating behavior of composite coatings on the aluminized steel generated using the plasma electrolytic oxidation (PEO) technique. Cross-sectional micrographs and elemental compositions were investigated by scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS). The composite coatings were shown to consist of Fe–Al,...

chapter

Study on the actuating performance of NiTi/Si composite film

Sun Shuangshuang, Liu Xiaohui

Proceedings of 2010 IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications > 224 - 228

2010 IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications (MESA 2010)

On the basis of considering the material nonlinearity of shape memory alloys, the mechanical model of the shape memory alloy composite film based on Si substrate is established by the method of mechanics of materials to study the coupled action between the shape memory alloy and Si substrate under thermal loads. The actuating performances of the SMA composite film are simulated and discussed for one...

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Search results

Influences of Thickness Ratio of Base Sheets on Formability of Tailor Welded Blanks

The stress analysis effect on structural health monitoring in functionally graded shell

Bearing capacity of rectangular footing on layered sand under inclined loading

3D numerical study of natural convection heat transfer from a hollow horizontal cylinder placed on the ground

Effect of Thickness Ratio in Piezoelectric/Elastic Cantilever Structure on the Piezoelectric Energy Harvesting Performance

Scaling and Performance Analysis of MEMS Piezoelectric Energy Harvesters

Research on thickness ratio and multilayers effect on the oil and paper space charge distribution

Experimental investigation of formability of Al-1050 tailor-welded blanks

An experimental investigation of the formability of low carbon steel tailor-welded blanks of different thickness ratios

Effect of thickness ratio on toughening mechanisms of Ta/W multilayers

Calculations of Stainless Steel-Aluminum Alloy Clad Forming Limit

Analysis of sandwich rolling with two different thicknesses outer layers based on slab method

Investigating the effect of double-layer wick thickness ratio on heat transfer performance of loop heat pipe

Effects of the Thickness Ratio of CrN vs Cr2O3 Layer on the Properties of Double-layered CrN/Cr2O3 Coatings Deposited by Arc Ion Plating

Research on structural optimization of the flexible magnetoelectric torque unimorph device

Characterization of periodic multilayer mirrors optimized for single attosecond pulse reflection

Growth stress evolution in HfO2/SiO2 multilayers

Microstructure; bonding strength and thickness ratio of Al/Mg/Al alloy laminated composites prepared by hot rolling

The crack propagating behavior of composite coatings prepared by PEO on aluminized steel during in situ tensile processing

Study on the actuating performance of NiTi/Si composite film

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