Effect of fracture energy estimation on the predictions of mode II behavior of bonded joints using cohesive zone models
Fracture behavior of adhesive joints is an important topic in structural design of new structural elements or in retrofitting of existing ones. The mechanical models available in literature capable of predicting the failure mode of these junctions are mainly formulated within the cohesive zone model...
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| Format: | Article |
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Gruppo Italiano Frattura
2025-04-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/5399/4205 |
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| author | Michele Perrella Enrico Armentani Giuseppe Lamanna Valentino Paolo Berardi |
| author_facet | Michele Perrella Enrico Armentani Giuseppe Lamanna Valentino Paolo Berardi |
| author_sort | Michele Perrella |
| collection | DOAJ |
| description | Fracture behavior of adhesive joints is an important topic in structural design of new structural elements or in retrofitting of existing ones. The mechanical models available in literature capable of predicting the failure mode of these junctions are mainly formulated within the cohesive zone model (CZM). Direct approaches for identification of CZM parameters in pure mode II of bonded joints, based on different modelling of strain energy release rate (SERR), are presented. The mode II SERR was determined from experimental results on end notched flexure (ENF) tests. Digital image correlation (DIC) analysis was used to evaluate the shear slip displacements of adhesive layer. The mode II cohesive traction-separation law was identified by numerical differentiation of SERR and best fit equation systems were adopted for an analytical description of cohesive interface behavior. Moreover, the obtained CZM laws were used for predicting the decohesion process by finite element analyses. Global and local responses of ENF test were compared with experimental data in terms of load-displacement and adhesive tangential displacement-time curves, respectively. A more accurate modelling of fracture energy resulted in a sounder agreement of prediction with experimental data. |
| format | Article |
| id | doaj-art-15517e30d18a471fbf4ed5f2c3487c6c |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-15517e30d18a471fbf4ed5f2c3487c6c2025-08-20T03:53:12ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932025-04-01197223624610.3221/IGF-ESIS.72.1710.3221/IGF-ESIS.72.17Effect of fracture energy estimation on the predictions of mode II behavior of bonded joints using cohesive zone modelsMichele PerrellaEnrico ArmentaniGiuseppe LamannaValentino Paolo BerardiFracture behavior of adhesive joints is an important topic in structural design of new structural elements or in retrofitting of existing ones. The mechanical models available in literature capable of predicting the failure mode of these junctions are mainly formulated within the cohesive zone model (CZM). Direct approaches for identification of CZM parameters in pure mode II of bonded joints, based on different modelling of strain energy release rate (SERR), are presented. The mode II SERR was determined from experimental results on end notched flexure (ENF) tests. Digital image correlation (DIC) analysis was used to evaluate the shear slip displacements of adhesive layer. The mode II cohesive traction-separation law was identified by numerical differentiation of SERR and best fit equation systems were adopted for an analytical description of cohesive interface behavior. Moreover, the obtained CZM laws were used for predicting the decohesion process by finite element analyses. Global and local responses of ENF test were compared with experimental data in terms of load-displacement and adhesive tangential displacement-time curves, respectively. A more accurate modelling of fracture energy resulted in a sounder agreement of prediction with experimental data.https://www.fracturae.com/index.php/fis/article/view/5399/4205bonded jointfinite element method (fem)cohesive zone model (czm)digital image correlation (dic)end notched flexure (enf) test |
| spellingShingle | Michele Perrella Enrico Armentani Giuseppe Lamanna Valentino Paolo Berardi Effect of fracture energy estimation on the predictions of mode II behavior of bonded joints using cohesive zone models Fracture and Structural Integrity bonded joint finite element method (fem) cohesive zone model (czm) digital image correlation (dic) end notched flexure (enf) test |
| title | Effect of fracture energy estimation on the predictions of mode II behavior of bonded joints using cohesive zone models |
| title_full | Effect of fracture energy estimation on the predictions of mode II behavior of bonded joints using cohesive zone models |
| title_fullStr | Effect of fracture energy estimation on the predictions of mode II behavior of bonded joints using cohesive zone models |
| title_full_unstemmed | Effect of fracture energy estimation on the predictions of mode II behavior of bonded joints using cohesive zone models |
| title_short | Effect of fracture energy estimation on the predictions of mode II behavior of bonded joints using cohesive zone models |
| title_sort | effect of fracture energy estimation on the predictions of mode ii behavior of bonded joints using cohesive zone models |
| topic | bonded joint finite element method (fem) cohesive zone model (czm) digital image correlation (dic) end notched flexure (enf) test |
| url | https://www.fracturae.com/index.php/fis/article/view/5399/4205 |
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