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On the Areospace-Grade Adhesives Shear Strength Testing with ASTM D5656 Test as an Example

BIBLIOGRAPHY [1] Higgins A., 2000, “Adhesive bonding of aircraft structures”, Int. Journal of Adhesion & Adhesives, No. 20, pp. 367-376. [2] Öchsner A., Genger J., 2004, “Critical analysis of the substrate deformation correction in the thick adherend tensile-shear test”, Int. Journ. Of Adhesion & Adhesives, No. 24, pp. 37-41. [3] ASTM D5656, “Standard test method for thick adherend metal lap-shear joints for determination of the stress-strain behavior of adhesives in shear by tension loading”. [4] Seneviratne W.P., Tomblin J.S., 2011

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Advanced coating of interior of tanks for rising environmental safety - novel applications of polyurethanes

Advanced coating of interior of tanks for rising environmental safety - novel applications of polyurethanes

The aim of this study was to develop urethane elastomers of predefined properties to be used as elastic coating in the cargo tanks of tankers. A method for coating the liquid polyurethane system onto steel and steel-concrete elements, and a way to join polyurethane coating with the aforementioned elements, were elaborated. The technique of injection the reactive liquid polyurethane system onto cold steel elements was used. The method for utilization and recovery of urethane oligomerols from the waste polyurethane coating in chemical recycling by using low molecular weight glycols as glycolysis agents was proposed.

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Comparative Studies of the Seatings of Propulsion Plants and Auxiliary Machinery on Chocks Made of Metal and Cast of Resin Part I. Mounting on Steel Chocks

REFERENCES 1. Cherry E., Church J.E. (2014): Shipboard Maintenance of Machinery. Engine Foundations. ITW Chockfast Marine – Industrial Grouts, Adhesives, Repair Products and Coatings . Retrieved from: http://www.chockfast.com/reference.html . 2. Germanischer Lloyd (2010): Guidelines for the Seating of Propulsion Plants and Auxiliary Machinery . Rules for Classification and Construction, VI, Part 4, Chapter 3. 3. Grudziński K., Jaroszewicz W. (2002): Seating of Machines and Devices on Foundation Chocks Cast of EPY Resin Compound. ZAPOL

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Leaf compressions from the Late Miocene sections of NW Italy: research on an efficient, easy and quick consolidation treatment

consolidants, adhesive and coatings, Second edition. – Butterworth-Heinemann/Elsevier, Oxford, 489 pp. (see section Silanes on pp. 276–280) Jackson, T., Watson, J. (2010): Conservation of waterlogged Chinese Lacquerware from the warring states period 475–221BC. – The conservator, 19: 45–51. https://doi.org/10.1080/01410096.1995.9995093 Koob, S. P. (1982): The instability of cellulose nitrate adhesives. – The Conservator, 6: 31–34. https://doi.org/10.1080/01410096.1982.9994961 Leidi, B. (2004): Le foglie fossili associate ad un cervide nella Formazione di

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Investigation of the role of the production process on the luminescence of sea salt products

ground to a smaller size, ~100µm, ensuring it will dissolve in the food when used. No additives were listed on the salt packaging. 3 Sample Preparation After receipt of a sample, it was gently hand ground in an agate mortar and pestle and sieved for the 180–250 μm fraction; the 125–180 μm fraction was also utilised for small batches, e.g. salt supplied in sachets typically containing <1 g of salt. The samples were mounted on 9.7 mm diameter stainless steel discs with silicone spray as an adhesive and masked to the central 7 mm area. Finely ground salt has a

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Optical dating of sediments from manas lake in northwestern china: Paleoenvironmental and neotectonic implications

with densities between 2.62 and 2.75 g/cm 3 are mainly quartz. These grains were further etched with 40% HF for 60 minutes to remove the outer alpha-irradiated layers and remaining impurities, followed by rinsing with 10% HCl to remove any precipitated fluorides. The etched quartz grains were then rinsed again with water and oven-dried at 50°C. Small aliquots were prepared for OSL measurement by mounting the grains on 9.8-mm diameter aluminium discs, using “Silkospray” silicone oil as an adhesive. Several hundreds of grains covered the central area of ~3 mm diameter

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High-resolution OSL dating of a coastal sediment sequence from the South Yellow Sea

, the quartz-rich fraction (2.62–2.70 g/cm 3 ) was extracted by density separation with sodium polytungstate. Finally, the quartz-rich fraction was etched with 40% hydrofluoric acid for one hour to remove the outer alpha-irradiated layer of the quartz grains and to eliminate feldspar contamination, and then the etchedfraction was rinsed with 10% HCI to remove any fluoride. The pure quartz grains were then mounted on 10-mm-diameter steel discs using silicone oil adhesive with a 2-mm-diameter monolayer for measurement. OSL measurement and equipment OSL

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Quartz OSL and K-feldspar post-IR IRSL dating of sand accumulation in the Lower Liao Plain (Liaoning, NE China)

and feldspar grains were mounted on stainless steel discs with a diameter of 6 mm and 2.5 mm respectively using silicone oil as adhesive. Luminescence measurements were carried out with an automated Ris⊘ TL/OSL system (DA-15) equipped with a calibrated 90 Y/ 90 Sr beta source. For quartz measurements, blue light-emitting diodes (LEDs, 470 ± 30 nm) were employed for stimulation, and the quartz OSL signals were detected through a 7.5mm Hoya U-340 filter. The feldspar signals were detected through a combined blue filter pack (Schott BG-39 and Corning 7-59) stimulated

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Influence of Honeycomb Core Stabilization on Composite Sandwich Structure Geometry

Abstract

Authors showed the influence of stabilization of the honeycomb core on shape of the composite sandwich test panel. Adhesive film laid on core ramps and cured with suitable cure cycle served as core stabilizer. Test panel geometry included different ramp angles (20° and 30°). To verify stabilization process a technology trial was performed. Three test panels were manufactured (3-stage, 1-stage and 1-stage with stabilized core). All test panels were manufactured in OoA process (Out of Autoclave). Panel surfaces were scanned with 3D scanner and compared with the reference CAD model. Both outer skin and inner skin were manufactured in Automated Fiber Placement Laboratory of Warsaw Institute of Aviation.

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Laser Doppler Vibrometer Based Examination of the Efficiency of Introducing Artificial Delaminations into Composite Shells

Abstract

During its operation, the laminate shell of the watercraft hull can be exposed to local stability losses caused by the appearance and development of delaminations. The sources of these delaminations are discontinuities, created both in the production process and as a result of bumps of foreign bodies into the hull in operation. In the environment of fatigue loads acting on the hull, the delaminations propagate and lead to the loss of load capacity of the hull structure. There is a need to improve diagnostic systems used in Structural Health Monitoring (SHM) of laminate hull elements to detect and monitor the development of the delaminations. Effective diagnostic systems used for delamination assessment base on expert systems. Along with other tools, the expert diagnostic advisory systems make use of the non-destructive examination method which consists in generating elastic waves in the hull shell structure and observing their changes by comparing the recorded signal with damage patterns collected in the expert system database. This system requires introducing certain patterns to its knowledge base, based on the results of experimental examinations performed on specimens with implemented artificial delaminations. The article presents the results of the examination oriented on assessing the delaminations artificially generated in the structure of glass- and carbon-epoxy laminates by introducing local non-adhesive layers with the aid of thin polyethylene film, teflon insert, or thin layer of polyvinyl alcohol. The efficiency of each method was assessed using laser vibrometry. The effect of the depth of delamination position in the laminate on the efficiency of the applied method is documented as well.

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