Specimen gripping effects in composites fatigue testing -– Concerns from initial investigation
This paper presents the findings of an initial investigation into effects of end tabs and gripping force on specimens for fatigue testing of structural composites. Live measurement of specimen compliance comparing extensometer measurements with grip displacement showed the impact of gripping on the...
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2015-05-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0005704&mi=cd |
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| author | P. B. S. Bailey A. D. Lafferty |
| author_facet | P. B. S. Bailey A. D. Lafferty |
| author_sort | P. B. S. Bailey |
| collection | DOAJ |
| description | This paper presents the findings of an initial investigation into effects of end tabs and gripping force on specimens for fatigue testing of structural composites. Live measurement of specimen compliance comparing extensometer measurements with grip displacement showed the impact of gripping on the dynamic behavior of the specimen. Use of thermal imaging enabled assessment of how load is introduced and carried along the specimen.
The effect of grip pressure and comparative merits of popular solutions are examined in the context of fatigue testing of composites. Although for static tests these potential issues have been investigated extensively throughout the history of composites research, interest has only recently fallen upon their effects on dynamic loading. Data collected show that the gripping pressure at the ends of the specimen can affect results more significantly than may be anticipated. These early results suggest that solutions which are well established for quasi-static testing may cause problems in cyclic tests. |
| format | Article |
| id | doaj-art-8b76625bebc64e52a8d05fe064493d3d |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2015-05-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-8b76625bebc64e52a8d05fe064493d3d2025-08-20T03:35:23ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2015-05-019548048810.3144/expresspolymlett.2015.45Specimen gripping effects in composites fatigue testing -– Concerns from initial investigationP. B. S. BaileyA. D. LaffertyThis paper presents the findings of an initial investigation into effects of end tabs and gripping force on specimens for fatigue testing of structural composites. Live measurement of specimen compliance comparing extensometer measurements with grip displacement showed the impact of gripping on the dynamic behavior of the specimen. Use of thermal imaging enabled assessment of how load is introduced and carried along the specimen. The effect of grip pressure and comparative merits of popular solutions are examined in the context of fatigue testing of composites. Although for static tests these potential issues have been investigated extensively throughout the history of composites research, interest has only recently fallen upon their effects on dynamic loading. Data collected show that the gripping pressure at the ends of the specimen can affect results more significantly than may be anticipated. These early results suggest that solutions which are well established for quasi-static testing may cause problems in cyclic tests.http://www.expresspolymlett.com/letolt.php?file=EPL-0005704&mi=cdPolymer compositesFracture and fatigueMateria testingthermographystress concentration |
| spellingShingle | P. B. S. Bailey A. D. Lafferty Specimen gripping effects in composites fatigue testing -– Concerns from initial investigation eXPRESS Polymer Letters Polymer composites Fracture and fatigue Materia testing thermography stress concentration |
| title | Specimen gripping effects in composites fatigue testing -– Concerns from initial investigation |
| title_full | Specimen gripping effects in composites fatigue testing -– Concerns from initial investigation |
| title_fullStr | Specimen gripping effects in composites fatigue testing -– Concerns from initial investigation |
| title_full_unstemmed | Specimen gripping effects in composites fatigue testing -– Concerns from initial investigation |
| title_short | Specimen gripping effects in composites fatigue testing -– Concerns from initial investigation |
| title_sort | specimen gripping effects in composites fatigue testing concerns from initial investigation |
| topic | Polymer composites Fracture and fatigue Materia testing thermography stress concentration |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0005704&mi=cd |
| work_keys_str_mv | AT pbsbailey specimengrippingeffectsincompositesfatiguetestingconcernsfrominitialinvestigation AT adlafferty specimengrippingeffectsincompositesfatiguetestingconcernsfrominitialinvestigation |