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Topic: Delamination

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	Delamination - Wikipedia, the free encyclopedia
		Delamination is a mode of failure of laminated composite materials.
		Delamination is an insidious kind of failure as it develops inside of the material, without being obvious on the surface, much like metal fatigue.
		Due to increasing use of composite materials in aviation, delamination is increasingly an air safety concern, especially in the tail sections of the airplanes.
	en.wikipedia.org /wiki/Delamination (206 words)

	NAUTICALweb - Delamination: is it serious, doctor?
		One of the most severe failure of FRP materials is delamination which occur when two layers of fiber separate: it first effect is to improve the elasticity of the laminate (easy to feel by hand) in the effected area, which usually spread to the nearby surfaces so that a hull or a deck become "soft".
		Because delamination is a progressive phenomenon which spread with time and is responsible for the weakness of the structure leading to cracks on the laminate, it must be repaired as promptly as possible.
		Delamination can be easily seen because it highlight a white surface, as shown on picture 10, where the mat ply can be effortlessly separated, as shown on picture 11.
	www.nautica.it /info/maint/delamine.htm (1636 words)

	Steady propagation of delamination events
		Delamination of the lithospheric thermal boundary from overlying continental crust propagates laterally from the line of initiation, accelerating as the sinking slab of detached lithosphere grows longer.
		Changes in viscosity affect this rate, but cold mode delamination is unstoppable except at continental margins or by failure in the sinking slab.
		The surface expression of delamination is a leading "outer rise" followed by a submarine trough with a large negative free-air anomaly, which finally evolves into a 1-km plateau.
	element.ess.ucla.edu /publications/1981_delamination/1981_delamination.htm (456 words)

	Delamination (Causes, Preventions, Repair) - VSeal
		Delamination is primarily caused by finishing the surface of the concrete before bleed water and bleed air has had the chance to escape.
		Often the owner is unaware that there is a delamination problem in his/her concrete until wear or traffic begins to break down the surface.
		Delamination exposes the aggregate which is much more susceptible to damage from weather and salt.
	www.vseal.com /surfacedefects/delamination.php (201 words)

	Delamination Modes in Composite Plates (Site not responding. Last check: 2007-10-12)
		Specimens of the glass cloth and epoxy matrix composite plate, including plates without delamination and plates with through-width delaminations, are manufactured by the lay-up technique.
		Delamination modes are found in delaminated plates by comparing the modal analysis results of the delaminated plates with the results of the nondelaminated plates.
		The sensitivity of the Teflon in the delamination area to the delamination modes is analyzed by the modal analysis experiments of the plates with Teflon in and out of the delamination area.
	www.pubs.asce.org /WWWdisplay.cgi?9604830 (157 words)

	Delamination Reports (Site not responding. Last check: 2007-10-12)
		Delamination at the carpet's edge This report was done for the carpet dealer and because there was a repeating pattern every three feet, trimming the edge would destroy half the carpet.
		Delamination From Latex This inspection was commissioned by the carpet mill and the installers discovered the delamination during the installation.
		Delamination from Water This report was done for the carpet mill and they backing was loaded with filler.
	www.carpetinspector.com /members/delamination_reports.htm (131 words)

	Canonical Wnt activity regulates trunk neural crest delamination linking BMP/noggin signaling with G1/S transition -- ...
		NC delamination was similarly monitored in alternating sections.
		BMP-dependent NC delamination from explanted neural primordia is inhibited by the G1/S transition blocker mimosine.
		dorsal tube are compatible with NC proliferation and delamination.
	dev.biologists.org /cgi/content/full/131/21/5327 (8448 words)

	Delamination and Visco-plasticity Modeling of Composites
		Delamination is one of the major mechanisms for energy absorption during high velocity impact and penetration of FRP.
		The response of FRP materials during delamination is described in terms of free surface velocity, normal and shear stresses at interface extrapolated from continuum stresses, normal and shear stresses at interface obtained from interface law, displacement jump at interface before delamination and delamination plane.
		The maximum tensile stress at the delamination plane is predicted to be 42, 29 and 7 MPa, respectively.
	clifton.mech.northwestern.edu /~espinosa/Delamination.html (2917 words)

	Abstracts of ISD Publications
		It is postulated that these energy release rates control the development of the shape of the delamination front, as well as the final unstable growth of the delamination, as observed in the experiment.
		Using the grid reflection method delamination growth was observed and the size and shape of the affected area determined, yielding the delamination contours.
		Using ultrasonic C-scan, delamination growth was observed and the size and shape of the affected area determined, yielding the delamination contours.
	research.nianet.org /~rkrueger/publi.html (6545 words)

	Good Old Boat: Delamination is not spelled D-O-O-M by Bill Sandifer (Site not responding. Last check: 2007-10-12)
		Delamination is the separation of layers of fiberglass cloth and resin from each other or from the core sandwiched between the layers.
		Most delamination occurs on the decks or in the cabinhouse structure of a boat, although it is possible for delamination to occur in the hull itself, particularly if the hull is cored.
		The coachroof was delaminated due to the roof-mounted winches, cam cleats, etc., being mounted, moved, and remounted without properly sealing the original holes.
	www.boatus.com /goodoldboat/delalimation.htm (2383 words)

	Delamination: The Sometime Curse of Entrained Air (Site not responding. Last check: 2007-10-12)
		Delamination is a “plane” of separation between the surface layer and main body of concrete.
		Some common causes of delamination are corrosion of reinforcing steel bars aligned at a given depth, inadequate design and bonding of topping slabs, cyclic freezing, and improper finishing.
		Concrete in the underside of the delaminated concrete from the warehouse floor has irregularly shaped and elongated voids that indicate there was trapped bleed water (boxed areas).
	www.concreteconstruction.net /industry-news.asp?sectionID=715&articleID=240609 (671 words)

	Delamination Of Hot Dip Galvanized Coatings
		The delamination, blistering or peeling of the galvanized coating only occurs when a certain set of metallurgical phenomena is present.
		On rough steel surfaces, galvanized coating delamination is generally less likely to occur because of the better mechanical keying of the coating to the steel surface.
		When galvanized coatings delaminate, there is always a thin zinc-iron alloy layer (the gamma layer) remaining in the surface so corrosion is unlikely to occur in the short term.
	www.corp.indgalv.com.au /technical/delam.htm (667 words)

	FRACTAL CHARACTERISTICS OF DELAMINATION IN CFRP LAMINATES (Site not responding. Last check: 2007-10-12)
		To promote the further application of this material, it is important to evaluate the characteristics of delamination CFRP laminates since one of the strength problems of the laminates is less impact strength for the delamination.
		For the evaluation of the delamination, we are given two kinds of information of the delamination, such as its size and form.
		The forms of the delamination could be evaluated by means of fractal dimensions as a parameter of the evaluation of impact delamination.
	www.ndt.net /abstract/wcndt96/data2/586.htm (390 words)

	C97-04 Effect of Delamination and Cracking on PEM Reliability (1 unit) Y. Ranade, P. McCluskey, M. Pecht
		Perhaps the most common source of delamination is ôpopcorningö during the solder reflow phase of assembly.
		In this instance, delamination occurs when the stresses resulting from the vaporization of absorbed moisture together with those resulting from mismatches in the coefficients of thermal expansion of the various package materials exceed the adhesion strength at one or more package interfaces.
		The question of whether delamination is a serious reliability concern is critically important in electronic systems which have been fielded for several years and are now being certified for continued use.
	www.calce.umd.edu /general/projects/summary/1997/c97-04.htm (493 words)

	Continental delamination
		As an example, the geologic and geophysical data from the Colorado Plateau are shown to be consistent with the hypothesis that it was uplifted by a delamination event 30 m.y.
		Based on this analogy, we might expect mature delamination events to propagate laterally at 10-20 cm/year.
		Although the extensional stress is greatest immediately after delamination, the strength minimum coincides with the heat-flow maximum that comes somewhat later.
	element.ess.ucla.edu /publications/1979_delamination/1979_delamination.htm (675 words)

	Fracture Delamination in Advanced Ceramic Package
		Edge delamination of the thin film wiring from the underlying glass ceramic was observed after a cutting operation at the edge of the module.
		The delamination became significantly more visible and extensive when the module was exposed to multiple cycles of simulated chip joining processes involving large temperature excursions.
		The calculations clearly showed that it was the polyimide insulator which was responsible for the delamination and cracking and not the copper metal even though the stress in the copper is more than 3 times higher than the worse case considered for the polyimide.
	ourworld.compuserve.com /homepages/rhlacombe/edlam.htm (2005 words)

	HKUST Institutional Repository: Item 1783.1/2034
		The results show that for through-width delamination in laminate composites with middle-layer embedded fiber, the extent and the location of delamination can be identified from a sudden slope change of the normalized integral strain vs. load position curve.
		The numerical and experimental data show that the delamination area could still be observed from the sudden slope change of the integral strain even when the fiber is located away from delaminated area.
		However, the sensitivity of delamination detection decreases with increasing transverse distance between the fiber and the edge of the patch.
	hdl.handle.net /1783.1/2034 (648 words)

	Search for Lithospheric Delamination along the Northwest Africa
		The exact process of such lithospheric mantle delamination depends on many parameters, including the initial thickness, density and vertical strength profiles of the two plates (Conrad and Molnar, 1997; Meissner and Mooney, 1998; Schott and Smelling, 1998), as well as the rate and the time history of the convergence (e.g., Pysklywec et al, 2000).
		The concept of lithospheric delamination dominates the literature on the present-day geodynamics of Morocco.
		Present-day Alboran delamination is occurring and is associated with north-south mantle strain in northern Morocco.
	www.ldeo.columbia.edu /users/menke/morocco/morocco.html (3987 words)

	Delamination Fatigue - Online Tips Delamination Fatigue (Site not responding. Last check: 2007-10-12)
		This delamination is commonly referred to as a blister...
		X-ray scattering, in the novel form of ultra small angle x-ray scattering, highlighted the fatigue initiation process from which the delamination fatigue model was improved upon.
		The failure modes, specifically underfill delamination, solder fatigue, and die cracking, are identified and analyzed.
	www.fatiguemeter.com /delaminationfatigue (1586 words)

	The Rutgers Scholar (Site not responding. Last check: 2007-10-12)
		In order to help the delaminations to grow in the composite material, a predetermined delamination is fabricated into the specimen (Figure 6).
		As such, in 4/29 the first number indicates where we put the delamination (between the fourth and the fifth ply) while the second number indicates the total number of plies of the whole specimen (29 plies).
		If delaminations are of the intralayer kind, it is more probable that they will get arrest and the component will be able to perform its function.
	www.scils.rutgers.edu /~weyang/ejournal/volume01/pelestra/pelestra.htm (1121 words)

	Thoughts on window delamination??? - FerrariChat.com
		Now its summer, I drive with the airconditioning on, windows usually slightly open...and the delamination is spreading.
		There are several that use some kind of epoxy that may slow or stop your delamination problem for a few hundred dollars.
		This is caused by UV slightly, but mostly by moisture that gets in the interlayer either during sloppy manufacture, during storege, or later after installation.
	www.ferrarichat.com /forum/showthread.php?t=63022 (490 words)

	Columbia River Basalts Delamination
		Delamination of lithospheric material allows for the rapid upwelling of hot (and likely fertile) asthenosphere to unusually shallow depths where it can then readily melt through decompression.
		The catalyst in their model is the intrusion of relatively small amounts of dense adiabatic melts into the lower lithosphere causing it to weaken and mechanically decouple from the upper lithosphere.
		Following delamination, extensive upwelling and melting formed the GR basalts, and the buoyant residuum that today supports the regional uplift was emplaced.
	www.mantleplumes.org /CRBDelam.html (2202 words)

	Etherington & Roberts. Dictionary--delamination (Site not responding. Last check: 2007-10-12)
		The removal of the laminating material from a document.
		Delamination of cellulose acetate film may be accomplished by soaking the sandwiched document in a solution of acetone, assuming proper tests have indicated that the ink on the document will not be affected by the solvent.
		Delamination is difficult to accomplish and generally more than one treatment is required to remove all traces of the laminate.
	palimpsest.stanford.edu /don/dt/dt0992.html (90 words)

	A Fasciclin 2 morphogenetic switch organizes epithelial cell cluster polarity and motility -- Szafranski and Goode 131 ...
		Delamination time is the point at which the BCs completely leave the epithelium (0% migration; green arrows).
		BCs delaminate slower, and Fas2, Dlg and Lgl have an apolar
		Delamination is significantly delayed, but the rate of migration is normal (Fig.
	dev.biologists.org /cgi/content/full/131/9/2023 (8114 words)

	Delamination tolerance studies in laminated composite panelsePrints@IISc - Open Access Archive of IISc Research ... (Site not responding. Last check: 2007-10-12)
		Determination of levels of tolerance in delaminated composite panels is an important issue in composite structures technology.
		The primary intention is to analyse delaminated composite panels and estimate Strain Energy Release Rate (SERR) parameters at the delamination front to feed into acceptability criteria.
		Numerical results are presented for circular delamination of various sizes and delamination at various interfaces (varying depth-wise location) between the base- and the sub-laminates.
	eprints.iisc.ernet.in /archive/00001676 (245 words)

	'+alt+'
		As already suggested, glass delamination in pharmaceutical vials can occur during manufacturing of the vial, e.g.
		fusion at the neck or base, where delamination and/or pitting are frequently found; or by adverse reaction to the vial contents, e.g.
		For confidentiality purposes, the manufacturers will be referred to as Company A, B, and C. In addition to determining the amount of glass delamination, further analysis was requested for Company B only, due to an unusual vertical-striation appearance.
	www.modernmicroscopy.com /main.asp?article=19 (108 words)

	3.1 Delamination/Blister Repair, Injection Method
		This method is used to repair mechanical or thermal blisters or delaminations in circuit board laminated base materials.
		This method can only be used when the laminate base material has separated sufficiently to allow the epoxy to flow throughout the void area.
		Drill into delamination blister with the Micro-Drill and ball mill.
	www.circuittechctr.com /guides/3-1.shtml (405 words)

	Offshoreonly.com - Delamination
		where it is delaminated the sound will be a dull thud instead of a resounding thump.
		I've heard that there are ultrasonic gauges that measure the density of the hull and can tell if there is water or a delamination.
		Delamination will sound dull and the hammer will not bounce or bounce very little.
	www.offshoreonly.com /forums/showthread.php?t=92882 (517 words)

	Experimental and Numerical Study of Delamination Growth Induced by a Transverse Crack in Unidirectional Laminates ...
		This paper presents the results of an experimental and numerical investigation into the mixed-mode delamination growth initiated from a transverse crack in unidirectional laminates under the three-point-bend test condition.
		The delamination growth was found to be stable both numerically and experimentally.
		The finite element delamination growth modeling incorporating the linear growth criterion was also used to model the growth of delamination.
	www.astm.org /JOURNALS/TESTEVAL/PAGES/544.htm (272 words)

	Woodalls Open Roads Forum: Class A Motorhomes: delamination
		The reason I started it was it had a small sign of delamination I wanted to take care of.
		I find this hard to believe, and think something else is the cause, but regardless it would appear that the only fix would be to completely remove the exterior and apply a new one (along with a new roof).
		Just fixing the delamination without fixing why it did st is a tremendous waste of time and money.
	www.woodalls.com /forums/index.cfm/fuseaction/thread/tid/9758336.cfm (809 words)

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