Estimating Low- and High-Cyclic Fatigue of Polyimide-CF-PTFE Composite through Variation of Mechanical Hysteresis Loops
The fatigue properties of neat polyimide and the “polyimide + 10 wt.% milled carbon fibers + 10 wt.% polytetrafluoroethylene” composite were investigated under various cyclic loading conditions. In contrast to most of the reported studies, constructing of hysteresis loops was performed through the s...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-07-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/13/4656 |
| _version_ | 1797408694027157504 |
|---|---|
| author | Sergey V. Panin Alexey A. Bogdanov Alexander V. Eremin Dmitry G. Buslovich Vladislav O. Alexenko |
| author_facet | Sergey V. Panin Alexey A. Bogdanov Alexander V. Eremin Dmitry G. Buslovich Vladislav O. Alexenko |
| author_sort | Sergey V. Panin |
| collection | DOAJ |
| description | The fatigue properties of neat polyimide and the “polyimide + 10 wt.% milled carbon fibers + 10 wt.% polytetrafluoroethylene” composite were investigated under various cyclic loading conditions. In contrast to most of the reported studies, constructing of hysteresis loops was performed through the strain assessment using the non-contact 2D Digital Image Correlation method. The accumulation of cyclic damage was analyzed by calculating parameters of mechanical hysteresis loops. They were: (i) the energy losses (hysteresis loop area), (ii) the dynamic modulus (proportional to the compliance/stiffness of the material) and (iii) the damping capacity (calculated through the dissipated and total mechanical energies). On average, the reduction in energy losses reached 10–18% at the onset of fracture, whereas the modulus variation did not exceed 2.5% of the nominal value. The energy losses decreased from 20 down to 18 J/m<sup>3</sup> (10%) for the composite, whereas they reduced from 30 down to 25 J/m<sup>3</sup> (17%) for neat PI in the low-cycle fatigue mode. For high-cycle fatigue, energy losses decreased from 10 to 9 J/m<sup>3</sup> (10%) and from 17 to 14 J/m<sup>3</sup> (18%) for neat PI and composite, respectively. For this reason, the changes of the energy losses due to hysteresis are of prospects for the characterization of both neat PI and the reinforced PI-based composites. |
| first_indexed | 2024-03-09T04:02:12Z |
| format | Article |
| id | doaj.art-20a49e2543d0472ab0060dbe6554a753 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T04:02:12Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-20a49e2543d0472ab0060dbe6554a7532023-12-03T14:11:01ZengMDPI AGMaterials1996-19442022-07-011513465610.3390/ma15134656Estimating Low- and High-Cyclic Fatigue of Polyimide-CF-PTFE Composite through Variation of Mechanical Hysteresis LoopsSergey V. Panin0Alexey A. Bogdanov1Alexander V. Eremin2Dmitry G. Buslovich3Vladislav O. Alexenko4Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, 634055 Tomsk, RussiaLaboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, 634055 Tomsk, RussiaLaboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, 634055 Tomsk, RussiaLaboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, 634055 Tomsk, RussiaLaboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, 634055 Tomsk, RussiaThe fatigue properties of neat polyimide and the “polyimide + 10 wt.% milled carbon fibers + 10 wt.% polytetrafluoroethylene” composite were investigated under various cyclic loading conditions. In contrast to most of the reported studies, constructing of hysteresis loops was performed through the strain assessment using the non-contact 2D Digital Image Correlation method. The accumulation of cyclic damage was analyzed by calculating parameters of mechanical hysteresis loops. They were: (i) the energy losses (hysteresis loop area), (ii) the dynamic modulus (proportional to the compliance/stiffness of the material) and (iii) the damping capacity (calculated through the dissipated and total mechanical energies). On average, the reduction in energy losses reached 10–18% at the onset of fracture, whereas the modulus variation did not exceed 2.5% of the nominal value. The energy losses decreased from 20 down to 18 J/m<sup>3</sup> (10%) for the composite, whereas they reduced from 30 down to 25 J/m<sup>3</sup> (17%) for neat PI in the low-cycle fatigue mode. For high-cycle fatigue, energy losses decreased from 10 to 9 J/m<sup>3</sup> (10%) and from 17 to 14 J/m<sup>3</sup> (18%) for neat PI and composite, respectively. For this reason, the changes of the energy losses due to hysteresis are of prospects for the characterization of both neat PI and the reinforced PI-based composites.https://www.mdpi.com/1996-1944/15/13/4656polyimidemilled carbon fibers (MCF)polytetrafluoroethylene (PTFE)polymer compositefatigue analysismechanical testing |
| spellingShingle | Sergey V. Panin Alexey A. Bogdanov Alexander V. Eremin Dmitry G. Buslovich Vladislav O. Alexenko Estimating Low- and High-Cyclic Fatigue of Polyimide-CF-PTFE Composite through Variation of Mechanical Hysteresis Loops Materials polyimide milled carbon fibers (MCF) polytetrafluoroethylene (PTFE) polymer composite fatigue analysis mechanical testing |
| title | Estimating Low- and High-Cyclic Fatigue of Polyimide-CF-PTFE Composite through Variation of Mechanical Hysteresis Loops |
| title_full | Estimating Low- and High-Cyclic Fatigue of Polyimide-CF-PTFE Composite through Variation of Mechanical Hysteresis Loops |
| title_fullStr | Estimating Low- and High-Cyclic Fatigue of Polyimide-CF-PTFE Composite through Variation of Mechanical Hysteresis Loops |
| title_full_unstemmed | Estimating Low- and High-Cyclic Fatigue of Polyimide-CF-PTFE Composite through Variation of Mechanical Hysteresis Loops |
| title_short | Estimating Low- and High-Cyclic Fatigue of Polyimide-CF-PTFE Composite through Variation of Mechanical Hysteresis Loops |
| title_sort | estimating low and high cyclic fatigue of polyimide cf ptfe composite through variation of mechanical hysteresis loops |
| topic | polyimide milled carbon fibers (MCF) polytetrafluoroethylene (PTFE) polymer composite fatigue analysis mechanical testing |
| url | https://www.mdpi.com/1996-1944/15/13/4656 |
| work_keys_str_mv | AT sergeyvpanin estimatinglowandhighcyclicfatigueofpolyimidecfptfecompositethroughvariationofmechanicalhysteresisloops AT alexeyabogdanov estimatinglowandhighcyclicfatigueofpolyimidecfptfecompositethroughvariationofmechanicalhysteresisloops AT alexanderveremin estimatinglowandhighcyclicfatigueofpolyimidecfptfecompositethroughvariationofmechanicalhysteresisloops AT dmitrygbuslovich estimatinglowandhighcyclicfatigueofpolyimidecfptfecompositethroughvariationofmechanicalhysteresisloops AT vladislavoalexenko estimatinglowandhighcyclicfatigueofpolyimidecfptfecompositethroughvariationofmechanicalhysteresisloops |