| Titre : |
A change of length has consequences : The coefficient of thermal expansion can help to sensure product quality |
| Type de document : |
texte imprimé |
| Auteurs : |
Natalie Rudolph, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 42-45 |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse thermomécanique
Composites -- Délaminage
Composites à fibres
Composites à fibres -- Moulage par injection
Dilatation (thermodynamique)
Fibres à orientation unidirectionnelle
Mesure
Polyéther éther cétone
Polypropylène
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
The design of parts and components made of fiber-reinforced composites needs to take the coefficient of thermal expansion into account because it determines the extent to which a material changes in length when heated or cooled. Neglecting this quality criterion can have far-reaching consequences. |
| Note de contenu : |
- TMA as tool for studying the expansion behavior
- An understanding of anisotropy is critical to high-performance composites
- Different coefficients of expansion in different directions
- How does the thermal expansion correlate to the flow field ?
- Determining time to delamination of electronic assemblies
- Fig. 1 : TMA measurement on a PP-GF-UD composite material. Sample size 25 mm, heating rate 5 K/min from –70 °C to 140 °C, N2 atmosphere, expansion sample holder made of fused silica
- Fig. 2 : a) Sample extraction location, b) dominant fiber orientation
- Fig. 3 : TMA measurement results of PEEK with short carbon fibers from different part locations; sample 1 = orange; sample 2 = red; sample 3 = green
- Fig. 4 : Determination of time to delamination on an FR4 composite circuit board. Sample size 6.35 mm2 as defined by IPC standard, dried for 2 h pre-measurement at 105 °C, heating rate 10K/min, N2 atmosphere, sample holder made of fused silica |
| En ligne : |
https://drive.google.com/file/d/1SMBww_r2xyAosNvyA0-MpYBYKSBW9mdp/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35498 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 2 (2021) . - p. 42-45
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A change of length has consequences in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2021)
