{"title":"Effect of Core Plasticity on the Post-Buckling Behavior of Debonded Sandwich Beams","authors":"B. Sankar, M. Narayanan, Abhinav Sharma","doi":"10.1115/imece2000-2025","DOIUrl":"https://doi.org/10.1115/imece2000-2025","url":null,"abstract":"\u0000 Nonlinear finite element analysis was used to simulate compression tests on sandwich composites containing debonded face sheets. The core was modeled as an elastic-perfectly-plastic material, and the face-sheet as elastic isotropic. The effects of core plasticity, face-sheet and core thickness, and debond length on the maximum load the beam can carry were studied. The results indicate that the core plasticity is an important factor that determines the maximum load.","PeriodicalId":104214,"journal":{"name":"Mechanics of Sandwich Structures","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123784828","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}
{"title":"Sandwich Shell Model With Woven Fabric Facings for Nonlinear Finite Element Simulation","authors":"A. Tabiei, R. Tanov","doi":"10.1115/imece2000-2038","DOIUrl":"https://doi.org/10.1115/imece2000-2038","url":null,"abstract":"\u0000 This paper presents a micromechanical model for analysis of woven fabric composites. The micro model is coupled with a shell element developed for the analysis of sandwich structures. Starting with the average strains in the representative volume cell and based on continuity requirements at the sub-cell interfaces, the strains and stresses in the composite constituents are determined as well as the average stresses in the lamina. In their formulation the developed micromechanical models take into consideration all components of the 3-D strain and stress tensors. The formulation is implemented in the explicit nonlinear finite element code DYNA3D. The performance of the model is assessed through couple of examples. The simplicity of formulation makes this model attractive for the nonlinear finite element analysis of sandwich composite structures with woven facings.","PeriodicalId":104214,"journal":{"name":"Mechanics of Sandwich Structures","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123413428","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}
{"title":"Failure Modes in Sandwich Beams With Composite Face-Sheets and PVC Foam Cores","authors":"C. Steeves, N. Fleck","doi":"10.1115/imece2000-2021","DOIUrl":"https://doi.org/10.1115/imece2000-2021","url":null,"abstract":"\u0000 Sandwich beams with glass-fibre reinforced plastic faces and PVC foam cores were manufactured and tested in three point bending. The experiments were compared with analytical predictions of beam behaviour for three failure modes: face microbuckling, core shear collapse, and local indentation. A new model for indentation failure was developed which gives accurate predictions for ultimate strengths of sandwich beams that fail due to indentation.","PeriodicalId":104214,"journal":{"name":"Mechanics of Sandwich Structures","volume":"283 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123430781","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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