نتایج جستجو برای: material anisotropy

تعداد نتایج: 396147  

2016
S. Karnati I. Axelsen F. F. Liou J. W. Newkirk

The complex solidification dynamics and thermal cycling during Selective Laser Melting process is expected to result in non-equilibrium material characteristics. There is an essential need for characterization techniques which are critical towards the estimation of anisotropies. The current investigation is targeted towards establishing tensile testing methodologies and their relation to differ...

Ahmad Assempour Hashem Zamanian Mehdi Bostan Shirin

In this work, an inverse finite element formulation was modified for considering material anisotropy in obtaining blank shape and forming severity of deep drawn orthotropic parts. In this procedure, geometry of final part and thickness of initial blank sheet were known. After applying ideal forming formulations between material points of initial blank and final shape, an equation system was obt...

Journal: :Nano letters 2015
A Mishchenko Y Cao G L Yu C R Woods R V Gorbachev K S Novoselov A K Geim L S Levitov

Few-layer black phosphorus was recently rediscovered as a narrow-bandgap atomically thin semiconductor, attracting unprecedented attention due to its interesting properties. One feature of this material that sets it apart from other atomically thin crystals is its structural in-plane anisotropy which manifests in strongly anisotropic transport characteristics. However, traditional angle-resolve...

2011
Daniela Tordella Michele Iovieno

The shearless mixing layer is constructed by combining two cubic simulation domains that each contain isotropic turbulences with different energy levels. The computational domain is a parallelepiped with aspect ratio equal to two (2L × L × L, L = 2π in dimensionless variables). Periodic boundary conditions are imposed in all directions. To satisfy this condition, the domain should host two shea...

2014
Jifei Ou Hiroshi Ishii Jerome B. Wiesner

This thesis takes a material perspective on designing transformable interfaces. The structure of material and mechanical properties such as stiffness, can determine not only its static performances, but also, with the help of external forces, support dynamic shape change. By encoding structural or stiffness distribution in the actuated materials, we can partially offload the shape-changing cont...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2007
Cheng-Wei Qiu Le-Wei Li Tat-Soon Yeo Saïd Zouhdi

Vector potential formulation and parametric studies of electromagnetic scattering problems of a sphere characterized by the rotationally symmetric anisotropy are studied. Both epsilon and mu tensors are considered herein, and four elementary parameters are utilized to specify the material properties in the structure. The field representations can be obtained in terms of two potentials, and both...

Journal: :SIAM Journal of Applied Mathematics 2008
Jinbiao Wu C. Sean Bohun Huaxiong Huang

Abstract. In this paper we present a semi-analytical thermal stress solution for directional growth of type III-V compounds with small lateral heat flux and weak anisotropy. Both geometric and material anisotropy are considered and our solution can be applied to crystals grown by various growth techniques such as the Czochralski method. The semi-analytical nature of the solution allows us to co...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2016
Di Yi Jian Liu Shang-Lin Hsu Lipeng Zhang Yongseong Choi Jong-Woo Kim Zuhuang Chen James D Clarkson Claudy R Serrao Elke Arenholz Philip J Ryan Haixuan Xu Robert J Birgeneau Ramamoorthy Ramesh

Magnetic anisotropy (MA) is one of the most important material properties for modern spintronic devices. Conventional manipulation of the intrinsic MA, i.e., magnetocrystalline anisotropy (MCA), typically depends upon crystal symmetry. Extrinsic control over the MA is usually achieved by introducing shape anisotropy or exchange bias from another magnetically ordered material. Here we demonstrat...

Journal: :Journal of physics. Condensed matter : an Institute of Physics journal 2011
Peter Zahn Nicki F Hinsche B Yu Yavorsky Ingrid Mertig

Different computational scheme for calculating surface integrals in anisotropic Brillouin zones are compared. An example of the transport distribution function (plasma frequency) of the thermoelectric material Bi(2)Te(3) near the band edges is discussed. The layered structure of the material together with the rhombohedral symmetry causes a strong anisotropy of the transport distribution functio...

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