Pub Date : 2020-03-05DOI: 10.15587/2312-8372.2020.200550
V. Bazhenov, M. Vabischevich
The object of research is the process of dynamic interaction of a complex system of cyclically symmetric parts of the support joint, taking into account the presence of stationary cracks. A significant number of structural elements and parts operated under dynamic loads are characterized by the occurrence and propagation of cracks in areas of significant plastic deformation. In particular, for the supporting device, it is a cyclically symmetric body with a limiting case of heterogeneity, under the action of pulsed loads, plastic flow zones arise at the boundaries of the joints of the cylindrical part with projections. If there are cracks in these areas, it becomes necessary to reliably determine the fracture parameters and predict the crack growth over time.
To build models of this class of objects, one of the most universal and reliable numerical methods is the semi-analytical finite element method.
In this paper, the results of calculating of the parameters of fracture mechanics on the basis of the semi-analytical method of finite elements are presented for an object with inhomogeneous physical and mechanical properties in the presence of stationary cracks under conditions of pulsed loading and plastic deformations. The numerical study is performed in two stages. At the first stage, the laws of the elastic-plastic dynamic deformation of the system are established. The most probable zones of damage accumulation and cracking are determined, which is the reason for the failure of structural elements. At the second stage, a model with a crack located in the zone of plastic deformations is considered, the calculated values of the dynamic stress intensity factors are studied, and their evolution over time is investigated.
The obtained research results can be used in numerous calculations of inhomogeneous bodies with damage such as cracks in the conditions of elastic-plastic dynamic deformations.
{"title":"Research of Nonlinear Dynamic Deformation of Spatial Bodies with Cracks","authors":"V. Bazhenov, M. Vabischevich","doi":"10.15587/2312-8372.2020.200550","DOIUrl":"https://doi.org/10.15587/2312-8372.2020.200550","url":null,"abstract":"The object of research is the process of dynamic interaction of a complex system of cyclically symmetric parts of the support joint, taking into account the presence of stationary cracks. A significant number of structural elements and parts operated under dynamic loads are characterized by the occurrence and propagation of cracks in areas of significant plastic deformation. In particular, for the supporting device, it is a cyclically symmetric body with a limiting case of heterogeneity, under the action of pulsed loads, plastic flow zones arise at the boundaries of the joints of the cylindrical part with projections. If there are cracks in these areas, it becomes necessary to reliably determine the fracture parameters and predict the crack growth over time.<br><br>To build models of this class of objects, one of the most universal and reliable numerical methods is the semi-analytical finite element method.<br><br>In this paper, the results of calculating of the parameters of fracture mechanics on the basis of the semi-analytical method of finite elements are presented for an object with inhomogeneous physical and mechanical properties in the presence of stationary cracks under conditions of pulsed loading and plastic deformations. The numerical study is performed in two stages. At the first stage, the laws of the elastic-plastic dynamic deformation of the system are established. The most probable zones of damage accumulation and cracking are determined, which is the reason for the failure of structural elements. At the second stage, a model with a crack located in the zone of plastic deformations is considered, the calculated values of the dynamic stress intensity factors are studied, and their evolution over time is investigated.<br><br>The obtained research results can be used in numerous calculations of inhomogeneous bodies with damage such as cracks in the conditions of elastic-plastic dynamic deformations.","PeriodicalId":262931,"journal":{"name":"ArchRN: Structures (Sub-Topic)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127199476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Later the revolution of different theories in the shear deformation theories, a Higherorder Shear Deformation Theory (HSDT) captivating into account transverse shear deformation effect has been grown; this will be worn for the static flexure study of thick isotropic beams. In these theories a displacement field is prolonged up to the second power of thickness coordinate of beams to have the parabolic difference of transverse shear stresses. The theory assume a parabolic deviation of transverse shear stress crosswise the thickness of the beams. A transverse shear stress will be obtain directly from the make use of constitutive relations, pleasing the shear stress-free boundary conditions at top and bottom of the beam. Governing differential equations and boundary conditions of theory will be obtain by the principle of virtual work. Common clarifications of thick isotropic simply cantilever beam subjected to various loading conditions will be analyzed for transverse displacement, axial displacement, transverse shear stress and axial stress. The outcomes of the contemporary theory will be compare with those of supplementary refined shear deformation theories of beam to authenticate the accuracy of the theory.
{"title":"Flexural Response of Cantilever Beam Subjected to Varying Load by HSDT","authors":"R. Thote, Dr. Gajendra Ghande, D. Tupe, S. Salve","doi":"10.2139/ssrn.3432192","DOIUrl":"https://doi.org/10.2139/ssrn.3432192","url":null,"abstract":"Later the revolution of different theories in the shear deformation theories, a Higherorder Shear Deformation Theory (HSDT) captivating into account transverse shear deformation effect has been grown; this will be worn for the static flexure study of thick isotropic beams. In these theories a displacement field is prolonged up to the second power of thickness coordinate of beams to have the parabolic difference of transverse shear stresses. The theory assume a parabolic deviation of transverse shear stress crosswise the thickness of the beams. A transverse shear stress will be obtain directly from the make use of constitutive relations, pleasing the shear stress-free boundary conditions at top and bottom of the beam. Governing differential equations and boundary conditions of theory will be obtain by the principle of virtual work. Common clarifications of thick isotropic simply cantilever beam subjected to various loading conditions will be analyzed for transverse displacement, axial displacement, transverse shear stress and axial stress. The outcomes of the contemporary theory will be compare with those of supplementary refined shear deformation theories of beam to authenticate the accuracy of the theory.","PeriodicalId":262931,"journal":{"name":"ArchRN: Structures (Sub-Topic)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130919257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-03-31DOI: 10.34218/IJARET.10.2.2019.002
Mukesh Gordhandas Bagani
In Bhuj earthquake 2001, there were collapses of many low rise buildings. After a very severe seismic shaking, it may be far cheaper to repair, or even rebuild the damaged structure, than to build a no damaged structure in the first place. With the help of shear walls the structure can be made which will not collapse in earthquake. It is general perception in minds of people that shear walls are economical for high rise buildings. Therefore it is necessary to find out cost efficiency of low rise buildings with shear walls.
{"title":"Structural Cost Comparison of Low Rise Building Having Moment Resisting Frames and Moment Resisting Frames With Shear Wall for Different Seismic Zones: Case Study","authors":"Mukesh Gordhandas Bagani","doi":"10.34218/IJARET.10.2.2019.002","DOIUrl":"https://doi.org/10.34218/IJARET.10.2.2019.002","url":null,"abstract":"In Bhuj earthquake 2001, there were collapses of many low rise buildings. After a very severe seismic shaking, it may be far cheaper to repair, or even rebuild the damaged structure, than to build a no damaged structure in the first place. With the help of shear walls the structure can be made which will not collapse in earthquake. It is general perception in minds of people that shear walls are economical for high rise buildings. Therefore it is necessary to find out cost efficiency of low rise buildings with shear walls.","PeriodicalId":262931,"journal":{"name":"ArchRN: Structures (Sub-Topic)","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131966779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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