Local zigzag effects and brittle delamination fracture of n-layered beams using a structural theory with three displacement variables
Equivalent single layer theories for layered beams effectively and accurately predict global displacements and internal force and moment resultants using a limited number of displacement variables. However, they cannot reproduce local effects due to material architecture or weak/imperfect bonding of...
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Gruppo Italiano Frattura
2020-01-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2683 |
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| author | Roberta Massabò Ilaria Monetto |
| author_facet | Roberta Massabò Ilaria Monetto |
| author_sort | Roberta Massabò |
| collection | DOAJ |
| description | Equivalent single layer theories for layered beams effectively and accurately predict global displacements and internal force and moment resultants using a limited number of displacement variables. However, they cannot reproduce local effects due to material architecture or weak/imperfect bonding of the layers, such as zigzag displacement fields, displacement jumps at the layer interfaces and complex transverse stress fields, nor can they simulate delamination damage growth. In this work we will present some applications and discuss advantages and limitations of a recently formulated zigzag model. The model, through a modification of the equilibrium equations of an equivalent single layer theory, which maintains the same number of variables, reproduces local effects and delamination fracture under mode II dominant conditions. The approach is based on a local enrichment of the displacement field of first order shear deformation theory, the introduction of cohesive interfaces and homogenization. |
| format | Article |
| id | doaj-art-34b0f2fd4b5a46ce87e90032a4f17856 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-34b0f2fd4b5a46ce87e90032a4f178562025-01-02T23:01:25ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932020-01-01145127528710.3221/IGF-ESIS.51.222683Local zigzag effects and brittle delamination fracture of n-layered beams using a structural theory with three displacement variablesRoberta Massabò0Ilaria Monetto1Department of Civil, Chemical and Environmental Engineering, University of Genova, ItalyDepartment of Civil, Chemical and Environmental Engineering, University of Genova, ItalyEquivalent single layer theories for layered beams effectively and accurately predict global displacements and internal force and moment resultants using a limited number of displacement variables. However, they cannot reproduce local effects due to material architecture or weak/imperfect bonding of the layers, such as zigzag displacement fields, displacement jumps at the layer interfaces and complex transverse stress fields, nor can they simulate delamination damage growth. In this work we will present some applications and discuss advantages and limitations of a recently formulated zigzag model. The model, through a modification of the equilibrium equations of an equivalent single layer theory, which maintains the same number of variables, reproduces local effects and delamination fracture under mode II dominant conditions. The approach is based on a local enrichment of the displacement field of first order shear deformation theory, the introduction of cohesive interfaces and homogenization.https://www.fracturae.com/index.php/fis/article/view/2683structural theoryzigzaghomogenizationcohesive zone modelbrittle fracturelaminate |
| spellingShingle | Roberta Massabò Ilaria Monetto Local zigzag effects and brittle delamination fracture of n-layered beams using a structural theory with three displacement variables Fracture and Structural Integrity structural theory zigzag homogenization cohesive zone model brittle fracture laminate |
| title | Local zigzag effects and brittle delamination fracture of n-layered beams using a structural theory with three displacement variables |
| title_full | Local zigzag effects and brittle delamination fracture of n-layered beams using a structural theory with three displacement variables |
| title_fullStr | Local zigzag effects and brittle delamination fracture of n-layered beams using a structural theory with three displacement variables |
| title_full_unstemmed | Local zigzag effects and brittle delamination fracture of n-layered beams using a structural theory with three displacement variables |
| title_short | Local zigzag effects and brittle delamination fracture of n-layered beams using a structural theory with three displacement variables |
| title_sort | local zigzag effects and brittle delamination fracture of n layered beams using a structural theory with three displacement variables |
| topic | structural theory zigzag homogenization cohesive zone model brittle fracture laminate |
| url | https://www.fracturae.com/index.php/fis/article/view/2683 |
| work_keys_str_mv | AT robertamassabo localzigzageffectsandbrittledelaminationfractureofnlayeredbeamsusingastructuraltheorywiththreedisplacementvariables AT ilariamonetto localzigzageffectsandbrittledelaminationfractureofnlayeredbeamsusingastructuraltheorywiththreedisplacementvariables |