Micromechanical thermal deformation analysis of unidirectional boron/aluminum metal-matrix composite
An experiment was conducted to document thermal deformation of a unidirectionally reinforced boron/aluminum metal-matrix composite. The specimen was subject to an isothermal loading of ΔT = − 100 ° C and the deformation on a free surface perpendicular to the fibers was measured by microscopic moiré...
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| Published in | Optics and lasers in engineering Vol. 24; no. 5; pp. 455 - 466 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier Ltd
01.01.1996
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| Online Access | Get full text |
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| Summary: | An experiment was conducted to document thermal deformation of a unidirectionally reinforced boron/aluminum metal-matrix composite. The specimen was subject to an isothermal loading of
ΔT = − 100 °
C and the deformation on a free surface perpendicular to the fibers was measured by microscopic moiré interferometry. The high sensitivity and spatial resolution made it possible to elucidate the micromechanical behavior of the specimen at the fiber level. Multiplied moiré fringe patterns with a contour interval of 35 nm/fringe contour were obtained for a hexagonal array of fibers and a square array of fibers. The stress-induced strains were determined from the fringe patterns by subtracting the free thermal contraction strains. The results revealed a free surface effect and showed asymmetrical and irregular strain distributions inherent in real (non-idealized) composite materials. |
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| ISSN: | 0143-8166 1873-0302 |
| DOI: | 10.1016/0143-8166(95)00101-8 |