LaVision StrainMaster材料应变形变成像测量系统
LaVision StrainMaster材料应变形变成像测量系统
LaVision StrainMaster材料应变形变成像测量系统
LaVision StrainMaster材料应变形变成像测量系统
LaVision StrainMaster材料应变形变成像测量系统
LaVision StrainMaster材料应变形变成像测量系统
LaVision StrainMaster材料应变形变成像测量系统
LaVision StrainMaster材料应变形变成像测量系统
LaVision StrainMaster材料应变形变成像测量系统
LaVision StrainMaster材料应变形变成像测量系统

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StrainMaster

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StrainMaster

StrainMaster from LaVision is a state-of-the-art, non-intrusive optical tool for shape, strain and deformation analysis of solid and granular subjects. StrainMaster combines the most advanced Digital Image Correlation (DIC)algorithms with the highest quality of hardware to provide a complete and easy to use instrument for materials analysis. A range of StrainMaster systems are available from portable field work systems to highly specialized lab versions.
LaVision's state-of-the-art Digital Volume Correlation (DVC) software brings new depth to quantitative imaging analysis. DVC is not only capable of identifying defects and cracks before they are visible in the raw image, but is also able to quantify the full volume strain distribution and actual magnitudes of the material displacements surrounding discontinuities.

Product Information

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  • Recent years have seen an increasing interest in Micro Air Vehicles (MAVs). MAVs are small (micro sized) aircraft and find their application in a multitude of commercial, industrial and military purposes. To perform their missions MAVs should be small sized, have good manoeuvrability, be well controllable and have a broad flight envelope. When flying in small confinements, the ability to fly at low airspeed and to have good manoeuvrability is critical. One type of MAVs, the flapping-wing MAV, particularly has attractive characteristics for flight in confined spaces. DelFly is a biplane flapping-wing MAV designed and built at Delft University of Technology. DelFly is able to hover and has an onboard camera for observation and vision-based control. For the DelFly project a top-down approach is followed, where from the study of a relative large model experience and theoretical insights can be gained, that can assist to create smaller, functional versions of the DelFly. The ultimate aim of the DelFly project is to improve the design to a very small full autonomous aircraft.

    其他 2012-07-08

  • Many materials, such as paints, clay suspensions, concrete or inks, are complex fluids which present non-Newtonian properties. To define their rheological properties and particularly for coarse suspensions (debris mud, sediments…), we need to develop specific devices because of the size of the particles within the fluid to reach the continuum assumption. The study of the inclined plane flows can be a solution as soon as we are able to measure the evolution of the free surface and the surface velocity during the flow. We have developed specific 3D measurements based on stereovision to extract rheological properties of two materials flowing down an inclined flow. First a shear thinning fluid (a polyoxyde ethylene solution) is used to validate the method which is then applied to a viscoplastic material (a bentonite suspension). The comparison of the results with conventional measurements using a rheometer is in good agreement.

    石油/化工 2012-07-07

  • We introduce and test an experimental approach to simulate elastoplastic megathrust earthquake cycles using an analogue model and apply it to study the seismotectonic evolution of subduction zones. The quasi-two-dimensional analogue model features rate- and state-dependent elastic-frictional plastic and viscoelastic material properties and is scaled for gravity, inertia, elasticity, friction, and viscosity. The experiments are monitored with a high-resolution strain analysis tool based on digital image correlation (particle imaging velocimetry, PIV), providing deformation time series comparable to seismologic, geodetic, and geologic observations. In order to separate elastic and nonelastic effects inherent the experimental deformation patterns, we integrate elastic dislocation modeling (EDM) into a hybrid approach: we use the analogue earthquake slip and interseismic locking distribution as EDM dislocation input and forward model the coseismic and interseismic elastic response. The residual, which remains when the EDM prediction is subtracted from the experimental deformation pattern, highlights the accumulation of permanent deformation in the model. The setup generates analogue earthquake sequences with realistic source mechanisms and elastic forearc response and recurrence patterns and reproduces principal earthquake scaling relations. By applying the model to an accretionary-type plate margin, we demonstrate how strain localization at the rupture peripheries may lead to a seismotectonically segmented forearc, including a tectonically stable shelf and coastal high (<20% plate convergence accommodated by internal shortening) overlying the area of large megathrust earthquake slip. Fifty to 75% of plate convergence is accommodated by internal shortening in the slope region where earthquake slip tapers out toward the trench. The inner forearc region remains undeformed and represents a basin.

    其他 2012-02-03

  • We consider the effects of the mixing conditions at the nozzle, on the mixing in a circular impinging jet. Two situations are considered: the completely premixed tracer or a locally injected tracer. The local instantaneous concentration field is determined by using Planar Laser-Induced Fluorescence (PLIF) technique. The premixed injection variant reveals the mixing effects of the outer shear layer, while the local mixing approach helps in understanding how to utilize the local injection for controlling the mixing of a scalar in an impinging jet. The concentration statistics and the mixing properties indicated by concentration probability density function (PDF) with the two injection methods are presented. The results show the well-known structural features in the turbulent impinging jet, the nature of mixing varies significantly in different regions of the jet. In the jet core region and the impingement region, the mixing is dominated mainly by the large-scale coherent structure, while in the mixing layer and wall jet region, both the large-scale structure and small scale turbulence control the mixing.

    其他 2011-05-07

  • 采用LaVision形变应变分析测试系统StrainMaster对水化钢包渣和石膏的应变硬化聚丙烯纤维增强复合材料的效应进行了测量和分析研究。

    石油/化工 2019-12-11

  • An experimental study has been conducted to investigate the static and wind-on performance of two in-house-developed polymer-based pressure-sensitive paints. Platinum tetrakis (pentafluorophenyl) porphyrin and tris-bathophenanthroline ruthenium II are used as the luminophores of these two polymer-based pressure-sensitive paints. The pressure and temperature sensitivity and the photo-degradation rate of these two pressure-sensitive paints have been investigated. In the wind tunnel test, it was observed that the normalised intensity ratio of both polymer-based pressure-sensitive paints being studied decreases with increasing the number of wind tunnel runs. The exact reason that leads to the occurrence of this phenomenon is unclear, but it is deduced that the luminophore is either removed or deactivated by the incoming flow during a wind tunnel test.

    石油/化工 2016-11-11

  • Many materials, such as paints, clay suspensions, concrete or inks, are complex fluids which present non-Newtonian properties. To define their rheological properties and particularly for coarse suspensions (debris mud, sediments…), we need to develop specific devices because of the size of the particles within the fluid to reach the continuum assumption. The study of the inclined plane flows can be a solution as soon as we are able to measure the evolution of the free surface and the surface velocity during the flow. We have developed specific 3D measurements based on stereovision to extract rheological properties of two materials flowing down an inclined flow. First a shear thinning fluid (a polyoxyde ethylene solution) is used to validate the method which is then applied to a viscoplastic material (a bentonite suspension). The comparison of the results with conventional measurements using a rheometer is in good agreement.

    石油/化工 2012-07-07

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  • DaVis是德国LaVsion公司推出的应用于反应和非反应流场测量,材料表面成像和追迹以及超快成像的智能(激光)成像技术的完整软件平台。 DaVis以灵活的图像采集模块,可用户定制的应用界面和特殊应用软件包三大特色功能成就了完美的成像系统所需软件。 DaVis软件可满足用户以纳秒量级的精度进行相机曝光,外部照明以及外部触发的同步控制并能自由选择采集图像序列。除此之外,DaVis软件拥有各种成像设置和控制的功能。 DaVis软件对用户开放,这种特色结合软件本身的宏命令语言,能够使得成像系统快速适应从高深的科学研究到可靠的工业应用等各种不同测量需求。 不仅如此,DaVis还拥有灵活的图像采集模式,先进的图像处理算法,多维图像数据的智能存储和显示,多种硬件的软件控制等功能。 集成了2DPIV和3DPIV功能模块的DaVis软件,参加了连续三年的PIVChallenge(http://www.pivchallenge.org)评测活动,均取得了优异成绩。客观证明了DaVis软件平台的出色性能。 PIVChallenge的组织者将两次PIVChallenge 活动的结果作了详尽的总结,并将结果发表在了公开的网站和杂志上。有关文章和下载网址如下: 1. Stanislas M, Okamoto K, Kaehler C (2003) Main results of the First International PIV Challenge. Meas Sci Technol 14:R63-R89 下载地址: http://stacks.iop.org/0957-0233/14/R63 或: http://www.oplanchina.com/download/Stanislas PIV challenge 2001.pdf 2. Stanislas M, Okamoto K, Kaehler C, Westerweel J (2005) Main results of the Second International PIV Challenge. Exp Fluids 39: 170-191 下载地址:http://www.oplanchina.com/download/PIV Challenge 2003 Results.pdf

    2171MB 2008-01-19
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