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Topic: Poissons ratio

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	Poissons ratio \| adhesion test (Site not responding. Last check: 2007-09-19)
		The ratio of transverse strain to longitudinal strain of a material under stress.
		Choi, JB, Lakes, RS Analysis OF Elastic-Modulus OF Conventional Foams AND OF Reentrant Foam Materials With A Negative Poissons Ratio INT J Mech SCI 37(1): 51-59 JAN 1995.
		Poisson's ratio is the ratio of transverse contraction strain to longitudinal extension strain in a.
	www.jewelry360.org /adhesiontest/poissons-ratio.html (209 words)

	Search Preview on Poissons Ratio
		Objective The objective of the experiment was to determine the values for Poisson’s ratio for some engineering metals, including metal and rubber.
		Current Ratio Current ratio is the amount of money that the company has for its current debt, or its ability to pay off its current debt, including using its inventory.
		In a fiercely competitive business world, ratio analysis is now not sufficient alone in indicating a company’s position; a fully painted and finished picture of a business’s current and future performance needs to be available to distinguish them from their competition.
	www.learnessays.com /free_search/Poissons_Ratio/1.html (972 words)

	Poisson ratio \| adhesion test
		Influence of Poisson's ratio uncertainty on calculations of the bowing parameter for strained InGaN layers.
		Poisson's ratio(ν, μ), named after Simeon Poisson, is a measure of this tendency.
		Dependent Modulus and Poisson’s Ratio on Structural Responses in Thin Asphalt Pavements.
	www.jewelry360.org /adhesiontest/poisson-ratio.html (177 words)

	NationMaster - Encyclopedia: Molybdenum
		In materials science, shear modulus S, sometimes referred to as the modulus of rigidity, is defined as the ratio of shear stress to the shear strain: S = shear stress/shear strain = (F/A)/and#934;.
		The bulk modulus K of a fluid or solid is the inverse of the compressibility: where p is pressure and V is volume.
		Figure 1: Rectangular specimen subject to compression, with Poissons ratio circa 0.
	www.nationmaster.com /encyclopedia/Molybdenum (2477 words)

	Follow-on work, negative Poisson's ratio (anti-rubber, auxetic, dilational) materials
		Poisson's ratio of degenerate crystalline phases of three-dimensional hard dimers and hard cyclic trimers (p 626-631) M.
		Universal negative Poisson ratio of self-avoiding fixed-connectivity membranes PHYS REV LETT 87 (14): - OCT 1 2001
		Prall, D, Lakes, RS Properties of a chiral honeycomb with a Poisson's ratio of -1.
	silver.neep.wisc.edu /~lakes/PoissonImp.html (6330 words)

	Poisson's ratio of thermoplastics as a non-linear viscoelastic material parameter. - British Plastics & Rubber - ...
		Poisson's ratio of thermoplastics as a non-linear viscoelastic material parameter.
		Author: Dassow, J. With non-linear viscoelastic materials, the Poisson's ratio is - like all other material characteristic values - dependent on temperature, type of loading, level of loading and loading rate.
		Poisson's ratio is defined as the negative ratio of...
	www.highbeam.com /doc/1G1-17294525.html (173 words)

	EN175: Advanced Mechanics of Solids - Linear Elastic Materials
		is the ratio of lateral to longitudinal strain in a uniaxial tensile stress.
		Young’s modulus and Poisson’s ratio are the most common properties used to characterize elastic solids, but other measures are also used. For example, we define the shear modulus, bulk modulus and Lame modulus of an elastic solid as follows:
		are generalized versions of Poisson’s ratio: they quantify the lateral contraction of a uniaxial tensile specimen. The shear terms are new – in an isotropic material, no shear strain is induced by uniaxial tension.
	www.engin.brown.edu /courses/En175/Notes/Elastic_material/Elastic_material.htm (1864 words)

	Learn Essays about Poissons Ratio
		The objective of the experiment was to determine the values for Poisson’s ratio for some engineering metals, including metal and rubber.
		The theory of Poisson’s Ratio is that as the material is stretched longitudinally it contracts laterally.
		There is however a third “type” of Poisson’s ratio, this material reacts very differently.
	www.learnessays.com /show_essay/128545.html (162 words)

	Laboratory Services: Materials Testing
		Poisson measurement is often of interest for design criterion when a material's mechanical properties are evaluated.
		Either strain gage or extensometers can be used for the strain measurements, but strain gages are preferred for their compact size.
		There are several limitations to Poisson determinations, but generally these are dictated by the material characteristics.
	www.trl.com /services/materialstesting/mechanical_compression_poissons.html (104 words)

	Method and apparatus for indirect determination of shear velocity from guided modes - Patent 4633449
		A multi-dimensional matrix is established comprised of predetermined ranges of assumed values of frequency, Poissons ratio, drilling fluid slowness, drilling fluid density, formation density, phase velocity and borehole diameter.
		The measured data is fitted to the multi-dimensional matrix to obtain an estimate of shear wave slowness at the point in the borehole, and the estimate is recorded as a function of depth.
		It is obvious from an inspection of the curves that in soft formations, where the values of shear modulus are 3.5 or less, it is virtually impossible to utilize the first mode Phase Velocity accurately to obtain a measure of shear modulus or an estimate of shear modulus.
	www.freepatentsonline.com /4633449.html (9154 words)

	The elastic constants of open cell foams having tetrakaidecahedral cells
		The Youngs modulus, shear modulus and Poissons ratio were derived, as functions of the edge cross-section and the foam density, by considering the bending, twisting and extension of the cell edges.
		The other deformation mechanisms are predicted to reduce the power law exponent by 3 to 5%, and the effect of edge torsion on the modulus level is small.
		The foam bulk modulus is predicted to vary linearly with its relative density, so Poissons ratio approaches 0.5 at low densities.
	www.perg.bham.ac.uk /papers/paper7.htm (163 words)

	"Creating a Velocity Model"
		The first line in the file contains the number of layers and a comment (the comment may be copied into the SAC header of synthetic seismogram, depends on the seismogram calculation code you use).
		Vp and Vs are in km/s and density is in g/cm^3, the strike and dip are in decimal degrees.
		Likewise, the value of Poisson's ratio is completely determined by Vp and Vs, and so it is not really used.
	eqseis.geosc.psu.edu /~cammon/HTML/RftnDocs/icmod01.html (433 words)

	Comparison of Hexahedral and Tetrahedral performance
		Analytical magnitude of shear stress was 0.68(independent of poisson’s ratio) The rotational displacement is 0.000003269 for poissons ratio 0.3 and 0.000003747 for poissons ratio of 0.49.
		This problem is modeling with varying poisson’s ratio to study volumetric locking.
		The analytical result of radial displacements for varying Poissons’s ratio is given in "A.results" column of the table.
	www.me.cmu.edu /faculty1/shimada/gm98/project/deepa/project/index.html (2117 words)

	u51a in sm02
		Recently ab-initio calculation of high-temperature elasticity at 6000 K showed a large increase in c/a ratio with temperature, the maximum VP in the basal plane, the minimum VP in the c-axis direction, and a difference of 10%, thus suggesting 1/3 of hcp iron crystals with their basal planes aligned with the rotation axis3.
		He has shown by fundamental mass ratios that i) the Earth as a whole, especially the inner 82%, has a state of oxidation like primitive enstatite chondrites, and ii) the lower mantle and core are similar in composition to the Abee enstatite chondrite.
		Deep-source He-3, the authors submit, is evidence of in-core sustained nuclear fission, rather than the out-gassing of primordial He-3; which in turn is evidence of large amounts of uranium residing in the Earth's core; which in turn is evidence that the core has a state of oxidation like the corresponding matter in primitive enstatite chondrites.
	www.agu.org /cgi-bin/SFgate/SFgate?&listenv=table&multiple=1&range=1&directget=1&application=sm02&database=/data/epubs/wais/indexes/sm02/sm02&maxhits=200&="U51A" (3285 words)

	Materials Measurement - Novel Poissons ratio technique for coatings
		NPL have recently outlined a new procedure for measuring the Poisson's ratio of thin deposited coatings (<5µm).
		By using impact excitation to determine the Young's modulus (E) of the coating and depth sensing indentation to determine the indentation modulus (E) it is also possible to determine the Poisson's* ratio (n) of the coating using the following expression:
		This technique has been successfully used to determine Poisson's ratio of TiN coatings applied to a range of different stainless steel and niobium substrates.
	www.npl.co.uk /publications/news/materials/issue24/novel_poissons.html (249 words)

	Names of negative Poisson's ratio materials: auxetic materials, anti-rubber, dilational materials
		Materials with a negative Poisson's ratio [1] have been called anti-rubber [2], dilational materials [3], or auxetic materials [4]; are also called auxetics.
		The cause of the negative Poisson's ratio is non-affine deformation.
		These laminates give rise to intentional negative Poisson's ratios combined with mechanical isotropy in two dimensions or in three dimensions [3].
	silver.neep.wisc.edu /~lakes/auxetic.html (5829 words)

	s72a in fm00
		These models were then combined to calculate Poisson's ratio, a more reliable indicator of rock type than P or S-wave velocity alone.
		Beneath this lies a zone exhibiting a Poisson's ratio 0.29-0.3 which we interpret as an extension of the Summit Creek basalt.
		Although, a number of rock types are candidates for this Poisson's ratio, it is clear that rocks with a Poisson's ratio of 0.23 to 0.24, as would be expected from marine sedimentary rocks, are not present.
	www.agu.org /cgi-bin/SFgate/SFgate?&listenv=table&multiple=1&range=1&directget=1&application=fm00&database=/data/epubs/wais/indexes/fm00/fm00&maxhits=200&="S72A" (9879 words)

	Material engineering other topics - Poissons ratio question...
		Incompressible materials are supposed to have a poissons ratio of 0.5.
		Maybe when its said that poissons ratio for an incompressible material is 0.5 it only applies to small deformations.
		Yes, you are correct that small deformations (small strains) are assumed in developing the theory leading up to Poisson's approximation.
	www.eng-tips.com /viewthread.cfm?qid=138382&page=5 (720 words)

	Pro/ENGINEER Forum: How can I vary hardness for material?
		What can i set are young's modulus are poisson's ratio.
		If it is bone vs. flesh you are modeling, then it is the stiffness (Young's modulus) you need to change rather than hardness (Rockwell, Vickers, etc).
		Poissons ratio should be about 0.3 for crystalline materials, but I have no idea what it should be for a bag of water like flesh.
	www.mcadcentral.com /proe/forum/forum_posts.asp?TID=32475 (410 words)

	Poissons Ratio 63 37 Solder
		Want information on poissons ratio 63 37 solder, we can help.
		Start by referring to our navigation menu to find more information on poissons ratio 63 37 solder from our site.
		If you were to replace parts of your power tools or clean it you should first unplug the power tool or lock it out when you are not using it.
	www.powerful-tools.com /poissons-ratio-63-37-solder.html (668 words)

	An updated checklist of the marine fish fauna of Reunion Island
		The Gobiidae only represented 5.4% of the ichthyofauna, which was similar to the ratio for Aqaba (Red Sea), contrasting with 8.0% recorded for the Maldives, 13.0% at Chagos or other higher percentages recorded in the Pacific Ocean.
		The Apogonidae and Scaridae are relatively poorly diversified at Reunion, also in contrast with the Maldives, Madagascar, Chagos, Aqaba (Red Sea) and certain Pacific areas.
		L’ichtyofaune de l’île de La Réunion a été étudiée au cours de plusieurs travaux portant sur l’écologie des poissons et sur les pêcheries artisanales.
	www.mnhn.fr /sfi/cybium/numeros/french/283/04.sumletourneur176.html (593 words)

	Chemistry: WebElements Periodic Table : Periodic properties : Poisson's ratio: Definition
		Chemistry: WebElements Periodic Table: Professional Edition: Definitions: Poisson's ratio
		Select from the menu to the left to view pictures illustrating the Poisson's ratio.
		Poisson's ratio is the lateral contraction per unit breadth divided by the longitudinal extension per unit length.
	202.114.89.5 /study/hxqy/yszqb/webelements/properties/text/definitions/poissons-ratio.html (231 words)

	FAQ - Material Properties
		What is Poisson’s ratio for ferrous P/M materials?
		The value for Poisson’s Ratio of ferrous P/M materials may be taken as 0.27+0.02.
		Poisson’s Ratio is a weak function of density.
	www.hoeganaes.com /navpages/FAQ/MaterialProperties.htm (592 words)

	Poissons Ratio Of Plastics \| Silicone
		Testing of Fiber Reinforced Advanced Ceramics - Astm C 1358; Compression Testing of Rigid Cellular Plastics - Astm D 1621; Poissons Ratio; Sacma Compression.
		tensile strength of drive belts to the breaking strength of welds in torsion; from the Poissons ratio.
		Poissons Ratio: 2% 16% 12% Processing Temperature, ºC: 30% Reflection Coefficient, Visible(0-1) 0% 2% 8% poissons ratio of plastics.
	silicone.jjforester.org /poissons-ratio-plastics.html (284 words)

	material editor
		example elastic modulus & poissons ratio etc. = =does anyone know where you can find the properties for materials in =the values that solidworks askes for?
		example elastic modulus & poissons ratio etc. = = does anyone know where you can find the properties for materials in = the values that solidworks askes for?
		Hi, I need to add some materials to the material editor (s7 tool steel & ren board 450) but I can't find most of the "physical properties" it asked for.
	www.comphelpone.com /new-4432284-5172.html (250 words)

	poissons ratio concrete Search Found at FreeResumeExamples.net
		thickness is 4E-06 Poissons Ratio =.0.2 Friction Coefficient = 1.5...
		James Instruments Inc. is the leading manufacturer of non-destructive test equipment for concrete and other coarse grained materials.
		for determination of modulus of elasticity and Poissons' ratio.
	www.freeresumeexamples.net /1a/aquarium/poissons%20ratio%20concrete.html (181 words)

	APPLICATION OF LABORATORY NON-DESTRUCTIVE TECHNIQUES FOR ROCKS (Site not responding. Last check: 2007-09-19)
		Keywords: Stability analysis; modulus of elasticity, Poissons ratio; compressional wave velocity; shear wave velocity
		The methods to determine the velocity of propagation of elastic waves in laboratory rock testing have been described in "ISRM Suggested Methods".
		Hence, the same shall be employed with great caution and scepticism, and only if the validity of assumptions, within the acceptable deviations, is established.
	www.ndt.net /abstract/wcndt96/data/522.htm (352 words)

	Forum Question: To reduce inside diameter of metal cylinder by force
		Estimate ratio of stressed size to unstressed size:
		A solid mechanics text book should have a more accurate method of calculating change in inside diameter.
		The ratio of change in length to change in diameter is called the poissons ratio.
	www.efunda.com /forum/show_message.cfm?start=1&thread=11710&id=11714 (157 words)

	Poissons ratio
		Was wondering if any kind person would be able to explain why Poissons ratio has theoretical limits of -1 to 0.5???
		Some Elasticity equations seem to break up when such poisson ratios are substituted.
		mmmm, I have read that there are some materials with negative poissons ratios that are man made-some, weird types of foam for example.....let me try and find the web site that I saw it on.
	www.physicsforums.com /showthread.php?t=49366 (357 words)

	Ratio (Site not responding. Last check: 2007-09-19)
		Analyzing Your Financial Ratios Overview Any successful business owner is constantlyevaluating the performance of his or her company comparing it with the company shistorical figures with its industr...
		User Guides Subject Guides Business Labor Economic s Industry Ratios Averages This is a guide to sources of industry ratios and averages and to materials that explain how to calculate and interpret t...
		Ratios and Formulas in Customer Financial Analysis Financial statement analysis is a judgmental process One of the primary objectives is identification of major changes in trends and relationships an...
	www.ratio2.com /poissons-ratio (1240 words)

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