Large displacement stability analysis of elastic–plastic unsymmetrical sandwich cylindrical shells

Jaskula, L.; Zielnica, J.

doi:10.1016/j.tws.2010.09.004

Cited by 14 publications

(15 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Scientific papers refer to different kinds of shell structures. The single-layer shells are considered in [6,7], whereas the bi-layered in [9] and sandwich ones in [9÷13]. Works [3,4] present different approaches and methods of sandwich structures analysis and the authors give large reference lists there.…”

Section: Introductionmentioning

confidence: 99%

The stability of the sandwich conical shell panel - the stress state analysis

Tertel

Kuryło

2017

Teh. vjesn.

View full text Add to dashboard Cite

Original scientific paper The paper presents an analysis of the stress state in a sandwich open conical shell panel. The shells under consideration consist of two face-layers (facings, claddings) and a core layer. The facings are load-carrying, a core layer is lightweight and it resists transverse shear only. The facings are made of isotropic, compressible, work-hardening materials. The core is the greater part of the whole shell thickness (over 80 %). The shell under consideration is two-parametrical loaded. Pre-buckling deformation of the shell could occur within the elastic, elastic-plastic or plastic range. In order to determine the stress state which occurs during stability loss, the constitutive relations of the Nadai-Hencky deformation (NHd) theory, alongside the HMH (HuberMises-Hencky) yield condition, are accepted. The results obtained from the analysis show that during stability loss, the effective stress may temporarily decrease. Then the unloading and hardening phenomena could occur and this should be taken into consideration. Keywords: buckling; deformation; sandwich shell; stability; stress Stabilnost konusne panel oplate slojevite konstrukcije -analiza stanja naprezanjaIzvorni znanstveni članak U radu se daje analiza stanja naprezanja konusne panel oplate slojevite konstrukcije. Analizirana oplata sastavljena je od dva vanjska sloja (obloge) i srednjeg sloja. Obloge podnose opterećenje, srednji sloj je male težine i odupire se samo poprečnom smiku. Obloge su od izotropnih, stlačivih materijala za otvrdnjivanje zbog obrade. Središnji sloj zauzima veći dio debljine čitave oplate (preko 80 %). Razmatrana oplata je dvo-parametarski opterećena. Do deformacije pred-izvijanja oplate može doći u okviru elastičnog, elastično-plastičnog ili plastičnog područja. Kako bi se odredilo stanje naprezanja do kojeg dolazi tijekom gubitka stabilnosti, prihvaćeni su konstitutivni odnosi Nadai-Hencky teorije deformacije uz Huber-Mises-Hencky(HMH) uvjet popuštanja. Dobiveni rezultati pokazuju da tijekom gubitka stabilnosti može doći do privremenog smanjenja efektivnog naprezanja. Tada može doći do pojave rasterećenja i kaljenja i treba ju uzeti u obzir.

show abstract

Section: Introductionmentioning

confidence: 99%

The stability of the sandwich conical shell panel - the stress state analysis

Tertel

Kuryło

2017

Teh. vjesn.

View full text Add to dashboard Cite

show abstract

“…Stability of cylindrical and conical shells is considered by many authors. Research works refer to single-layer shells [5][6][7], as well as bi-layered [8,9] and sandwich ones [10][11][12][13]. Various methods of sandwich structures analysis are presented in [3,4] and a large reference list is given there.…”

Section: Introductionmentioning

confidence: 99%

The Stress State in the Three-layer Open Conical Shell During Stability Loss

Tertel¹,

Kuryło²,

Papacz³

2015

AMS

View full text Add to dashboard Cite

The paper presents an analysis of the stress state in a sandwich open conical shells during of stability loss. The shells under consideration consist of a lightweight core layer and two face-layers which are load-carrying. The thickness of those faces is assumed to be equal, and the thickness of the core is about 80% of the whole shell thickness. The load carrying faces are made of isotropic, compressible, work-hardening materials. The core layer is assumed to be elastic, incompressible in the normal z direction and it resists transverse shear only. The shell under consideration is loaded by lateral pressure and longitudinal force. Deformation of the shells within the plastic range is possible before buckling. In order to determine the stress state which occurs during stability loss, the stability equations have to be derived. With respect to this research, the constitutive relations of the Nadai-Hencky deformation theory, alongside the HMH (Huber-Mises-Hencky) yield condition, are accepted in the analysis.

show abstract

“…Besides, they used finite element ABAQUS solution to verify the analytical results. Jaskula and Zielnica [7] studied stability analysis of sandwich cylindrical shell for combination of loading based to elastic-plastic behavior of the shell. The J2 incremental Prandtl-Reuss plastic flow theory was used in this research.…”

Section: Introductionmentioning

confidence: 99%