Bending of sheets and profiles on a four-roll machine for rocket bodies, pipe and frame products. Part 7

2021 ◽  
pp. 53-60
Author(s):  
V.A. Zharkov
Keyword(s):  
Stress State ◽  
Sheet Stamping ◽  
Roller Machine ◽  
Strain Stress ◽  
Formation Of Cracks

The theory and calculation of the parameters of the strain-stress state at the stages of pre-bending, calibration, straightening, bending of a straightened section and bending of the subsequent sections, taking into account the hardening of the billet on a roller machine, is developed. Deformations, stresses and forces acting on the billet from the rolls were investigated by CAD/CAE-modeling. Criteria for the formation of cracks, low accuracy and excessive springback of the part after these stages of processing are determined. Recommendations for the elimination of these defects are given. Keywords: sheet stamping, billet, bending, roller machine, pre-bending, calibration, straightening, CAD/CAE modeling. [email protected]

Bending of sheets and profiles on a four-roll machine for rocket bodies, tubular and frame products. Part 6

2021 ◽  
pp. 49-57
Author(s):  
V.A. Zharkov
Keyword(s):  
Stress State ◽  
Sheet Stamping ◽  
Roller Machine ◽  
Strain Stress ◽  
Formation Of Cracks

The theory and calculation of the parameters of the strain-stress state at the stages of pre-bending, calibration, straightening, bending of a straightened section and bending of the next section, taking into account the hardening of the workpiece on a roller machine, is developed. Deformations, stresses and forces acting on the workpiece from the rolls were investigated by CAD/CAE-modeling. Criteria for the formation of cracks, low accuracy and excessive springback of the workpiece after these stages of processing are determined. Recommendations for eliminating these defects are given. Keywords: sheet stamping, billet, bending, roller machine, pre-bending, calibration, straightening, CAD/CAEmodeling. [email protected]

Bending of sheets and profiles on a four-roll machine for rocket bodies, tube and frame products. Part 4

2020 ◽  
pp. 45-54
Author(s):  
V.A. Zharkov
Keyword(s):  
Mathematical Model ◽  
Stressed State ◽  
Sheet Stamping ◽  
Formation Of Cracks ◽  
Processing Steps

A theory and a mathematical model are developed for calculating the parameters of the strain-stressed state at the stages of pre-bending, calibration, straightening and bending of the straightened section, taking into account the strengthening of the billet on a roll machine. By CAD/CAE modeling the strains, stresses and forces acting on the billet from the rolls are investigated. Criteria for the formation of cracks, low accuracy and excessive springing of the billet after these processing steps are determined, recommendations are given for their elimination. Keywords billet, sheet stamping, bending, roll machine, pre-bending, calibration, straightening, bending of the straightened section, CAD/CAE modeling. [email protected]

Calculation of strain-stress state of flywheel in potential field

2015 ◽  
Vol 8 ◽  
pp. 1703-1712 ◽  
Author(s):  
D.V. Berezhnoi ◽  
D.E. Chickrin ◽  
L.R. Gajnulina ◽  
E.Yu. Kurchatov ◽  
P.A. Kokunin ◽  
...  
Keyword(s):  
Stress State ◽  
Potential Field ◽  
Strain Stress

Anisotropic strain-stress state and intermixing in epitaxial Mo(110)/Ni(111) multilayers: An x-ray diffraction study

2010 ◽  
Vol 107 (2) ◽  
pp. 023515 ◽  
Author(s):  
G. Abadias ◽  
A. Debelle ◽  
A. Michel ◽  
C. Jaouen ◽  
F. Martin ◽  
...  
Keyword(s):  
Stress State ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray ◽  
Anisotropic Strain ◽  
Strain Stress

scholarly journals ESTIMATION OF PIPELINE SYSTEMS FLEXIBLE CONNECTING PIPE STRENGTH PROPERTIES BASED ON NUMERICAL STUDY OF STRAIN-STRESS STATE

2020 ◽  
Vol 8 (1) ◽  
pp. 082-089
Author(s):  
M. Yu. Sergaeva ◽  
◽  
I. M. Strokov ◽  
А. А. Sergaev ◽  
◽  
...  
Keyword(s):  
Stress State ◽  
Numerical Study ◽  
Strength Properties ◽  
Pipeline Systems ◽  
Strain Stress

В настоящее время для трубопроводных систем разрабатываются виброизолирующие конструкции на основе резинокордных оболочек. Основная роль компенсирующего патрубка - это исключение передачи усилий от действия давления рабочей среды в полости трубопровода на фланцы и присоединяемые механизмы. Для оценки прочностных характеристик резинокордного патрубка на основе численного исследования используется трехмерная модель, армированная балочными элементами. В результате проведен расчет напряженно-деформированного состояния резинокордной оболочки и фланцевого соединения патрубка. Определенные аспекты исследования необходимо учитывать при проектировании и эксплуатации конструкций патрубков на основе армированных оболочек.

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