搜索结果: 1-15 共查到“工学 bending”相关记录59条 . 查询时间(0.04 秒)
THE EFFECT OF SOUND WAVE BENDING ON UNDERWATER ACOUSTIC POSITIONING ACCURACY
Underwater Acoustic Positioning System Sound Speed Sound Wave Bending Positioning Accuracy
2016/3/17
Underwater acoustic positioning system solves the problem of how to position and navigate object underwater. Therefore, it can help people to locate the area of disaster to search and succor. But, bec...
Bending, Wrinkling, and Folding of Thin Polymer Film/Elastomer Interfaces
Deformation Folding Instability Polymer Thin Film Wrinkling
2014/11/21
This work focuses on understanding the buckling deformation mechanisms of bending, wrinkling, and folding that occur on the surfaces and interfaces of polymer systems. We gained fundamental insight in...
Making a paper airplane in school used to mean trouble. Today it signals a promising discovery in materials science research that could help next-generation technology –like wearable energy storage de...
Quest for jellyfish robot leads to discovery of bending rules for animal wing, fin tips（图）
Quest for jellyfish robot wing fin tips
2014/3/20
A Navy-sponsored project to design a biologically inspired, swimming jellyfish robot has led scientists to the surprising discovery of common bending rules for the tips of wings, fins, flukes, mollusk...
Temperature-Independent Fiber Bending Sensor Based on a Superimposed Grating
Bending measurement fiber-optic sensor super-imposed grating tilted fiber Bragg grating (TFBG)
2013/5/27
A compact fiber bending sensor has been presented by superimposing a uniform fiber Bragg grating (FBG) into a tilted fiber Bragg grating (TFBG). The reflection of FBG is modulated by the same bandwidt...
Static Fatigue Characterization With Uniform and Ultra-Small Bending
Static Fatigue Characterization Ultra-Small Bending
2015/5/18
Static fatigue characteristics with uniform and ultra-small bending are investigated using a proposed slotted bending fixture. The humidity dependence of the time to failure characteristics in HAF is ...
糙米三点弯曲破碎力学性能试验分析（Experiment Analysis on Three-point Bending Breaking Force of Brown Rice）
糙米 腹部 背部
2010/12/29
分别以糙米的腹部、背部作为承压面，对糙米的三点弯曲破碎力学性能进行了测试。测试结果表明，籽粒腹部、背部的三点弯曲破碎力和破碎力的分布特性存在一定的差异性，即腹部作为承压面的破碎力分布区域较分散，呈现多峰分布，而背部作为承压面的破碎力呈现集中分布的特性；腹部作为承压面的抗弯强度和弹性模量均大于背部，而其断裂能却小于背部。糙米的加工品质与其三点弯曲破碎力学性能之间亦存在一定的相关关系。
弯扭耦合柔性构件系统的变结构控制研究（Variable Structure Control Coupled Bending-torsional Flexible Structure System）
柔性构件 耦合振动 致动器
2010/12/28
对由柔性杆和柔性梁组成的两连杆柔性构件系统的弯扭耦合振动进行了研究，建立了此柔性系统的动力学方程。在柔性杆根部粘贴一只压电扭转致动器抑制柔性杆的扭转振动，在柔性梁根部粘贴一只压电弯曲致动器抑制柔性梁的弯曲振动。采用一种带有饱和环节及滤波器的滑模变结构控制策略，进行了实验研究。结果表明：施控后的系统是稳定的，弯扭的各阶模态均能得到有效抑制，柔性梁末端的振动位移能得到显著衰减。
Distributed Characterization of Bending-Induced Birefringence in Spun Fibers by means of P-OFDR
Fiber characterization Fiber measurements
2015/6/10
We report, for the first time, spatially-resolved measurements of bending-induced birefringence in ad hoc drawn single-mode spun fibers. The combined effect of spin rotation and bending birefringence ...
Octagonal Large-Mode-Area Leakage Channel Fiber with Reduced Bending Loss
Fiber design and fabrication Fiber properties Lasers fiber Photonic crystal fibers
2015/6/10
We investigate a novel design for high-power large-mode-area leakage channel fibers(LCFs) with a single octagonal dual-diameter air-hole ring encircling a nine-cell pure-silica core,having a tenfold d...
Low Bending Sensitivity of Regular OM3/OM4 Fibers in 10GbE Applications
Fiber optics links subsystems Optical communications
2015/6/4
Regular graded-index multi-mode fibers exhibit low bend losses under 10GBASE-S sources launches. Improved process control of the inner part of the graded-core of OM3/OM4 fibers saves margins in 10GbE ...
Finite element analysis of 2D SMA beam bending
Shape memory alloy SMA cantilever beam Thermomechanical Martensitic transformation Finite element
2012/2/29
A thermomechanical model of a shape memory alloy beam bending under tip force loading is implemented in finite element codes. The constitutive model is a one dimensional model which is based on free e...
Symplectic system based analytical solution for bending of rectangular orthotropic plates on Winkler elastic foundation
Orthotropic plate Symplectic space Winkler elastic foundation Analytical solution
2012/2/28
This paper analyses the bending of rectangular orthotropic plates on a Winkler elastic foundation. Appropriate definition of symplectic inner product and symplectic space formed by generalized displac...
Bending of orthotropic plates resting on Pasternak’s foundations using mixed shear deformation theory
Mixed theory Bending Rectangular plates Pasternak’s model
2012/2/28
The mixed first-order shear deformation plate theory (MFPT) is employed to study the bending response of simply-supported orthotropic plates. The present plate is subjected to a mechanical load and re...
Springback prediction in V-die bending: modelling and experimentation
Springback prediction V-die bending modelling experimentation
2010/8/12
Spring-back is a common phenomenon that occurs in sheet metal bending after unloading due to elastic recovery. It could be defined in terms of spring-back ratio K (the ratio between the produced and d...