Dimensional stability performance of a CFRP sandwich optical bench for microsatellite payload

The objective of this paper is to effectively use soybean straw biomass resources and decrease the negative effects of using synthetic resin. Soybean straw was ground through a wet process then hot-pressed to make biodegradable fiberboard (bio-board) without any binder. The effect of heating temperature on mechanical properties and dimensional stability performance of produced bio-board was investigated. Bonding quality and chemical changes of the bio-board were also evaluated using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The moisture content decreased from 12.5% to 3.4% with the increase of heating temperature. Meanwhile, most mechanical properties of bio-board improved. However, an excessive heating temperature, especially at 230 °C, did not significantly promote the improvement of most mechanical properties. However, the dimensional stability performance of the bio-board was greatly improved from 140 °C to 230 °C. Overall, the results showed that bio-board could be made by using soybean straw without any synthetic resin. Heating temperature plays a significant role in affecting the properties of bio-board. The refined bio-board is expected to be used as a packaging material, heat insulation in architecture, and mulch film for agricultural purposes.

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Quantification of Parameters Influencing the Long-Term Dimensional Stability Performance of Pentane Blown Laminates

Journal of Cellular Plastics ◽

10.1177/0021955x9903500505 ◽

1999 ◽

Vol 35 (5) ◽

pp. 438-457 ◽

Cited By ~ 2

Author(s):

M. Baes ◽

C. Galina ◽

K. Vanlandschoot

Keyword(s):

Dimensional Stability ◽

Stability Performance

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Design guidelines for high dimensional stability of CFRP optical bench

10.1117/12.2024138 ◽

2013 ◽

Cited By ~ 3

Author(s):

Nichola Desnoyers ◽

Marc-André Boucher ◽

Philippe Goyette

Keyword(s):

Dimensional Stability ◽

Design Guidelines ◽

High Dimensional ◽

Optical Bench

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Dimensional stability performance of fire retardant treated veneer-oriented strandboard composites

BioResources ◽

10.15376/biores.6.1.308-316 ◽

2010 ◽

Vol 6 (1) ◽

pp. 308-316

Author(s):

Zeki Candan ◽

Nadir Ayrilmis ◽

Turgay Akbulut

Keyword(s):

Boric Acid ◽

Dimensional Stability ◽

Linear Expansion ◽

Fire Retardant ◽

Thickness Swelling ◽

Monoammonium Phosphate ◽

Stability Performance ◽

Oriented Strandboard ◽

Lime Water ◽

Fagus Orientalis Lipsky

This study investigated dimensional stability properties of oriented strandboard (OSB) panels faced with fire retardant treated (FRT) veneers. The beech (Fagus orientalis Lipsky) veneers were treated with monoammonium phosphate (MAP), diammonium phosphate (DAP), lime water (LW), and a borax/boric acid (BX/BA) (1:1) mixture. Dimensional stability tests were performed according to ASTM D-1037. The results revealed that facing veneers impregnated with fire-retardant chemicals had significant effects on the linear expansion (LE) properties. The lowest LE value was obtained from the panels faced with MAP treated veneers, while the highest LE value was found in the panels faced with BX/BA treated veneers. The FRT treated veneer facing technique also affected the thickness swelling (TS) properties of the OSB panels. The panels faced with LW treated veneers had the highest TS, whereas the panels faced with MAP treated veneers had the lowest TS values.

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The extended Fourier algorithm: Application in discrete optics and electron holography

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100172322 ◽

1994 ◽

Vol 52 ◽

pp. 918-919

Author(s):

E. Voelkl ◽

L. F. Allard

Keyword(s):

Fourier Transform ◽

Fourier Transforms ◽

Sampling Rate ◽

Electron Holography ◽

Optical Bench ◽

Fourier Space ◽

Ccd Cameras ◽

Simulated Image ◽

Initial Sampling ◽

Fourier Algorithm

The conventional discrete Fourier transform can be extended to a discrete Extended Fourier transform (EFT). The EFT allows to work with discrete data in close analogy to the optical bench, where continuous data are processed. The EFT includes a capability to increase or decrease the resolution in Fourier space (thus the argument that CCD cameras with a higher number of pixels to increase the resolution in Fourier space is no longer valid). Fourier transforms may also be shifted with arbitrary increments, which is important in electron holography. Still, the analogy between the optical bench and discrete optics on a computer is limited by the Nyquist limit. In this abstract we discuss the capability with the EFT to change the initial sampling rate si of a recorded or simulated image to any other(final) sampling rate sf.

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