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Effect of specimen ...
Effect of specimen width on strength in off-axis compression tests
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- Wilhelmsson, Dennis, 1980 (författare)
- Chalmers University of Technology, Sweden,Chalmers tekniska högskola
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- Asp, Leif, 1966 (författare)
- Chalmers University of Technology, Sweden,Chalmers tekniska högskola
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- Gutkin, Renaud (författare)
- RISE,SICOMP
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- Edgren, F. (författare)
- GKN Aerospace Sweden AB, Sweden,GKN Aerospace Services Limited
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(creator_code:org_t)
- ISBN 9783000533877
- European Conference on Composite Materials, ECCM, 2016
- 2016
- Engelska.
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Ingår i: ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials. - : European Conference on Composite Materials, ECCM. - 9783000533877
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Abstract
Ämnesord
Stäng
- Compression tests have been performed according to ASTM D6641 to check whether 12 mm is a sufficient width for off-axis tests of a unidirectional Non Crimp Fabric (NCF) reinforced carbon-fibre composite. Various off-axis angles are tested in a larger context and it is important to establish a representative material volume. The test matrix consists of two different widths for two off-axis cases, 15° and 20° with a total sample size of 24. A two-sample T-test is performed for each off-axis angle to check if there is a statistically significant difference of the compressive strength between specimens with different widths. The null hypothesis, that there is no difference between the mean values is tested with a double-tailed test on a 5 % significance level. Neither of the cases may be rejected, i.e. there is no statistically significant difference on the 5 % level. The 15° off-axis case returns a p-value of 7.4 % and the 20° off-axis case gives a p-value of 21.3 %. It can be concluded that the effect is small and not statistically significant. It means that remaining off-axis testing in the larger context can proceed with the nominal width of 12 mm.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Nyckelord
- ASTM D6641
- Compression
- NCF
- Off-Axis
- Strength
- Carbon
- Carbon fibers
- Compaction
- Composite materials
- Compression testing
- Carbon fibre composites
- Off-axis compression tests
- Significance levels
- Statistically significant difference
- Two sample t tests
- Compressive strength
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)
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