Stress concentration in nonlinear viscoelastic composites
A nonlinear viscoelastic problem of the mechanics of composites is solved within the framework of a second-order nonlinear theory. A viscoelastic functional is used to construct general defining relations. A stochastic boundary value problem for determining the stress concentration and its relaxatio...
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| Format: | Article |
| Language: | English |
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National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"
2017-06-01
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| Series: | Mechanics and Advanced Technologies |
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| Online Access: | http://journal.mmi.kpi.ua/article/view/66490 |
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| author | B. Maslov |
| author_facet | B. Maslov |
| author_sort | B. Maslov |
| collection | DOAJ |
| description | A nonlinear viscoelastic problem of the mechanics of composites is solved within the framework of a second-order nonlinear theory. A viscoelastic functional is used to construct general defining relations. A stochastic boundary value problem for determining the stress concentration and its relaxation in polymer composite materials (PCM) is solved. To derive the complete system of second-order viscoelastic equations, the method of successive approximation is used. A generalization of the correspondence principle to nonlinear viscoelastic media is obtained. The relaxation functions averaged over the viscoelastic matrix and elastic inclusions and the stress concentration parameters are determined. Examples are given showing the importance of the mutual influence of nonlinear elastic and viscous properties of the components on stress redistribution near inclusions in multicomponent PCMs. As a practical result, one can note the possibility of predicting the long-term strength of a material when a viscoelastic stress field is known near inclusions. |
| format | Article |
| id | doaj-art-e8e99036d3204cf3abe4286bd5047ea0 |
| institution | DOAJ |
| issn | 2521-1943 2522-4255 |
| language | English |
| publishDate | 2017-06-01 |
| publisher | National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" |
| record_format | Article |
| series | Mechanics and Advanced Technologies |
| spelling | doaj-art-e8e99036d3204cf3abe4286bd5047ea02025-08-20T02:50:59ZengNational Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"Mechanics and Advanced Technologies2521-19432522-42552017-06-011(79)10.20535/2521-1943.2017.79.6649066490Stress concentration in nonlinear viscoelastic compositesB. Maslov0S.P. Timoshenko Institute of Mechanics NAS Ukraine, KyivA nonlinear viscoelastic problem of the mechanics of composites is solved within the framework of a second-order nonlinear theory. A viscoelastic functional is used to construct general defining relations. A stochastic boundary value problem for determining the stress concentration and its relaxation in polymer composite materials (PCM) is solved. To derive the complete system of second-order viscoelastic equations, the method of successive approximation is used. A generalization of the correspondence principle to nonlinear viscoelastic media is obtained. The relaxation functions averaged over the viscoelastic matrix and elastic inclusions and the stress concentration parameters are determined. Examples are given showing the importance of the mutual influence of nonlinear elastic and viscous properties of the components on stress redistribution near inclusions in multicomponent PCMs. As a practical result, one can note the possibility of predicting the long-term strength of a material when a viscoelastic stress field is known near inclusions.http://journal.mmi.kpi.ua/article/view/66490viscoelastic compositenonlinear deformationhereditary kernelidentificationcomputer modeling |
| spellingShingle | B. Maslov Stress concentration in nonlinear viscoelastic composites Mechanics and Advanced Technologies viscoelastic composite nonlinear deformation hereditary kernel identification computer modeling |
| title | Stress concentration in nonlinear viscoelastic composites |
| title_full | Stress concentration in nonlinear viscoelastic composites |
| title_fullStr | Stress concentration in nonlinear viscoelastic composites |
| title_full_unstemmed | Stress concentration in nonlinear viscoelastic composites |
| title_short | Stress concentration in nonlinear viscoelastic composites |
| title_sort | stress concentration in nonlinear viscoelastic composites |
| topic | viscoelastic composite nonlinear deformation hereditary kernel identification computer modeling |
| url | http://journal.mmi.kpi.ua/article/view/66490 |
| work_keys_str_mv | AT bmaslov stressconcentrationinnonlinearviscoelasticcomposites |