Experimental study on how free-edge effects impede CTE measurements
The present paper is focussed on the experimental quantification of free-edge effects and their relevance when laminates’ coefficients of thermal expansion (CTEs) are determined by means of thermo-mechanical analysis (TMA). TMA tests have been performed for specimens with in-plane dimensions of abou...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-07-01
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| Series: | Composites Part C: Open Access |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666682021000244 |
| _version_ | 1819137126756777984 |
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| author | Erik Kappel |
| author_facet | Erik Kappel |
| author_sort | Erik Kappel |
| collection | DOAJ |
| description | The present paper is focussed on the experimental quantification of free-edge effects and their relevance when laminates’ coefficients of thermal expansion (CTEs) are determined by means of thermo-mechanical analysis (TMA). TMA tests have been performed for specimens with in-plane dimensions of about 6 mm x 6 mm and 28 mm x 28 mm and a thickness of 5.56 mm. The examined 30-ply laminate with highly orthotropic stacking is made from HEXCEL’s M21E/IMA medium grade prepreg. The conducted tests clearly substantiate the strong effect of sample size. CTEs determined from the small sample data are found to exceed large-sample CTEs by 122% in the laminate’s x-direction and 76% in y-direction, even though both samples were cut from the same CFRP panel. |
| first_indexed | 2024-12-22T10:45:55Z |
| format | Article |
| id | doaj.art-5be9e51206df4c7da5bd8dc431bedc05 |
| institution | Directory Open Access Journal |
| issn | 2666-6820 |
| language | English |
| last_indexed | 2024-12-22T10:45:55Z |
| publishDate | 2021-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Composites Part C: Open Access |
| spelling | doaj.art-5be9e51206df4c7da5bd8dc431bedc052022-12-21T18:28:56ZengElsevierComposites Part C: Open Access2666-68202021-07-015100129Experimental study on how free-edge effects impede CTE measurementsErik Kappel0DLR, Institute of Composite Structures and Adaptive Systems, Lilienthalplatz 7, Braunschweig 38108, GermanyThe present paper is focussed on the experimental quantification of free-edge effects and their relevance when laminates’ coefficients of thermal expansion (CTEs) are determined by means of thermo-mechanical analysis (TMA). TMA tests have been performed for specimens with in-plane dimensions of about 6 mm x 6 mm and 28 mm x 28 mm and a thickness of 5.56 mm. The examined 30-ply laminate with highly orthotropic stacking is made from HEXCEL’s M21E/IMA medium grade prepreg. The conducted tests clearly substantiate the strong effect of sample size. CTEs determined from the small sample data are found to exceed large-sample CTEs by 122% in the laminate’s x-direction and 76% in y-direction, even though both samples were cut from the same CFRP panel.http://www.sciencedirect.com/science/article/pii/S2666682021000244Thermo-mechanical analysisOrthotropic laminatesCTEProcess-induced distortions |
| spellingShingle | Erik Kappel Experimental study on how free-edge effects impede CTE measurements Composites Part C: Open Access Thermo-mechanical analysis Orthotropic laminates CTE Process-induced distortions |
| title | Experimental study on how free-edge effects impede CTE measurements |
| title_full | Experimental study on how free-edge effects impede CTE measurements |
| title_fullStr | Experimental study on how free-edge effects impede CTE measurements |
| title_full_unstemmed | Experimental study on how free-edge effects impede CTE measurements |
| title_short | Experimental study on how free-edge effects impede CTE measurements |
| title_sort | experimental study on how free edge effects impede cte measurements |
| topic | Thermo-mechanical analysis Orthotropic laminates CTE Process-induced distortions |
| url | http://www.sciencedirect.com/science/article/pii/S2666682021000244 |
| work_keys_str_mv | AT erikkappel experimentalstudyonhowfreeedgeeffectsimpedectemeasurements |