نتایج جستجو برای: elastic layer density

تعداد نتایج: 734616  

B Kebli, F Guerrache

We study the thermoelastic deformation of an elastic layer. The upper surface of the medium is subjected to a uniform thermal field along a circular area while the layer is resting on a rigid smooth circular base. The doubly mixed boundary value problem is reduced to a pair of systems of dual integral equations. The both system of the heat conduction and the mechanical problems are calculated b...

1998
Victor D. Efros Winfried Leidemann Giuseppina Orlandini

The spectral function of 4He is calculated with the Lorentz integral transform method in a large energy and momentum range. The excitation spectrum of the residual 3N–system is fully taken into account. The obtained spectral function is used to calculate the quasi elastic longitudinal (e, e) response RL of 4He for q = 300, 400, and 500 MeV/c. Comparison with the exact RL shows a rather sizeable...

Journal: :جنگل و فرآورده های چوب 0
حمیدرضا رودی تهران- دانشگاه شهید بهشتی- دانشکده مهندسی انرژی و فناوری های نوین- گروه مهندسی فناوری سلولز و کاغذ یحیی همزه دانشگاه تهران- دانشکده منابع طبیعی- گروه علوم و صنایع چوب و کاغذ اعظم برهانی دانشگاه تهران- دانشکده منابع طبیعی-گروه علوم و صنایع چوب و کاغذ

in this study, in order to constitute polyelectrolyte multilayers (pem) using layer-by-layer nanotechnology, recycled fibers were subsequently treated with cationic starch (cs) and anionic starch (as) multi-layers each layer conducted at neutral ph for 10 minutes. also, to compare with mechanical of refining, the pulp was refined for 25 minutes to the freeness of about 291 ml.csf using valley b...

Journal: :The Journal of the Acoustical Society of America 2012
Jeongwon Park Buhm Park Deokman Kim Junhong Park

This work presents a method to determine the effective dynamic properties of resonant metamaterials. The longitudinal vibration of a rod with periodically attached oscillators was predicted using wave propagation analysis. The effective mass density and modulus were determined from the transfer function of vibration responses. Predictions of these effective properties compared favorably with la...

2012
Ankesh Kumar Srivastava S. P. Singh

CuO, Fe2O3, MnO2 and ZnO substituted 45S5 bioactive glasses were prepared. Glass derived Bioactive Glass ceramics were obtained through controlled crystallization of bioactive glasses. The formed crystalline phases in bioactive glass ceramics were identified using X ray diffraction (XRD) analysis. Density and ultrasonic wave velocities of bioactive glasses and glass ceramics were measured and u...

Journal: :IEICE Transactions 2012
Masahiko Jinno Hidehiko Takara Yoshiaki Sone Kazushige Yonenaga Akira Hirano

This paper presents an elastic optical path network architecture as a novel networking framework to address the looming capacity crunch problem in internet protocol (IP) and optical networks. The basic idea is to introduce elasticity and adaptation into the optical domain to yield spectrally-efficient optical path accommodation, heightened network scalability through IP traffic offloading to th...

2015
Yuetao Duan Jie Luo Guanghao Wang Zhi Hong Hang Bo Hou Jensen Li Ping Sheng Yun Lai

We derive and numerically demonstrate that perfect absorption of elastic waves can be achieved in two types of ultra-thin elastic meta-films: one requires a large value of almost pure imaginary effective mass density and a free space boundary, while the other requires a small value of almost pure imaginary effective modulus and a hard wall boundary. When the pure imaginary density or modulus ex...

Mohammad Golzar, Sajad Rajabi Jalal

In this paper, Vacuum Assisted Resin Transfer Molding (VARTM) method was simulated by analytical solution. Then the effect of parameters like fiber density, distribution of layer thickness, perform layer thickness, resin viscosity was investigated theoretically. Obtained results show that by selecting optimum distribution layer thickness, increasing fiber volume fraction, reducing viscosity of ...

2001
JÓZEF IGNACZAK

A one-dimensional pure stress initial boundary value problem of linear elastodynamics for amicroperiodic layered semi-space in which amicrostructural length is taken into account is revisited. Also, the plane stress harmonic waves propagating in a microperiodic layered infinite elastic space are discussed. It is shown that (i) for a particular system of the length and time units the transient s...

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