نتایج جستجو برای: strain rate sandwich composites

تعداد نتایج: 1206895  

Gh Payganeh H Malek-Mohammadi R Moradi-Dastjerdi,

In this paper, a refined plate theory is applied to investigate the free vibration analysis of functionally graded nanocomposite sandwich plates reinforced by randomly oriented straight carbon nanotube (CNT). The refined shear deformation plate theory (RSDT) uses only four independent unknowns and accounts for a quadratic variation of the transverse shear strains across the thickness, and satis...

Journal: :archives of cardiovascular imaging 0
mohammad sahebjam tehran heart center, cardiology department, tehran university of medical sciences, tehran, ir iran; tehran heart center, north kargar street, tehran, ir iran. tel: +98-2188029257, fax: +98-2188029256 asghar mazareei tehran heart center, cardiology department, tehran university of medical sciences, tehran, ir iran masoumeh lotfi-tokaldany tehran heart center, cardiology department, tehran university of medical sciences, tehran, ir iran neda ghaffari tehran heart center, cardiology department, tehran university of medical sciences, tehran, ir iran arezoo zoroufian tehran heart center, cardiology department, tehran university of medical sciences, tehran, ir iran mahmood sheikhfatollahi tehran heart center, cardiology department, tehran university of medical sciences, tehran, ir iran

M. Nasihatgozar S. Mohammad Reza Khalili,

In this paper, the effect of different boundary conditions on the free vibration analysis response of a sandwich plate is presented using the higher order shear deformation theory. The face sheets are orthotropic laminated composites that follow the first order shear deformation theory (FSDT) based on the Rissners-Mindlin (RM) kinematics field. The motion equations are derived considering the c...

2016
Rahim Jan Amir Habib Muhammad Aftab Akram Tanveer-ul-Haq Zia Ahmad Nawaz Khan

Polyvinyl alcohol (PVA)-stabilized graphene nanosheets (GNS) of lateral dimension (L) ~1 μm are obtained via liquid phase exfoliation technique to prepare its composites in the PVA matrix. These composites show low levels of reinforcements due to poor alignment of GNS within the matrix as predicted by the modified Halpin-Tsai model. Drawing these composites up to 200 % strain, a significant imp...

Journal: :Nanoscale 2014
Rahim Jan Peter May Alan P Bell Amir Habib Umar Khan Jonathan N Coleman

We have used liquid exfoliation of hexagonal Boron-Nitride (BN) to prepare composites of BN nanosheets of three different sizes in polyvinylchloride matrices. These composites show low levels of reinforcement, consistent with poor alignment of the nanosheets as-described by a modified version of Halpin-Tsai theory. However, drawing of the composites to 300% strain results in a considerable incr...

2014
H. Arora M. Kelly A. Worley P. Del Linz A. Fergusson P. A. Hooper J. P. Dear

Composite sandwich materials have yet to be widely adopted in the construction of naval vessels despite their excellent strength-to-weight ratio and low radar return. One barrier to their wider use is our limited understanding of their performance when subjected to air blast. This paper focuses on this problem and specifically the strength remaining after damage caused during an explosion. Carb...

2012
Chenhui Zhao Guangcheng Zhang Yibo Wu

The resin flow behavior in the vacuum assisted resin infusion molding process (VARI) of foam sandwich composites was studied by both visualization flow experiments and computer simulation. Both experimental and simulation results show that: the distribution medium (DM) leads to a shorter molding filling time in grooved foam sandwich composites via the VARI process, and the mold filling time is ...

Journal: :Composites Science and Technology 2023

Strain-rate-dependent mechanical properties and impact performance of manufactured epoxy-based nanocomposites are investigated. As reinforcements, fumed silica (FS) halloysite nanotube (HNT) used alongside Albipox 1000 Nanopox F700. First, the internal structures composites visualised using scanning electron microscopy (SEM). To identify strain-rate-dependent properties, three-point bend tests ...

2015
Elhadji Barra NDIAYE Naïm SAMET Pierre MARECHAL Hugues DUFLO

Composites are nowadays increasingly used in industries such as aerospace, shipbuilding, automotive ... They are lightweight and have a very high specific stiffness, but defects such as delamination, inclusions may occur during their life cycle. Samples of sandwich honeycomb are tested using a 10 MHz central frequency phased array transducer constituted of 128 elements. Different defects are lo...

M Rahmani Y Mohammadi,

This study is limited to study of buckling analysis of a sandwich cylindrical shell with functionally graded face sheets and homogenous core. High-order sandwich plate theory is improved by considering the in-plane stresses of the core that usually are ignored in the analysis of sandwich structures. Assume that all properties of the face sheets and the core are temperature dependent. Strain com...

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