Coreelation between plastic-strain deviator and stress deviator in simultaneous tension and torsion of a thin-walled cylinder in dependence on the type of stress deviator of the preload

1981 ◽  
Vol 13 (1) ◽  
pp. 46-51
Author(s):  
T. N. Mozharovskaya ◽  
F. F. Giginyak
Keyword(s):  
Plastic Strain ◽  
Stress Deviator ◽  
Strain Deviator ◽  
Thin Walled ◽  
Walled Cylinder

Improving the honing accuracy of the holes of stepped thin-walled cylinders

2021 ◽  
pp. 49-54
Author(s):  
V.A. Ogorodov
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cutting Forces ◽  
Software Package ◽  
The Finite Element Method ◽  
Radial Forces ◽  
Thin Walled ◽  
Hole Machining ◽  
Deform 3D ◽  
Walled Cylinder

Different ways of fixing of stepped thin-walled cylinders during honing are analyzed. The conditions for increasing the accuracy of hole machining are determined on the basis of unevenness of cylinder deformations from clamping forces and radial forces simulating cutting forces. The studies used the finite element method and the DEFORM-3D V6.1 software package. Keywords: honing, stepped thin-walled cylinder, hole, accuracy, fixing method, deformation, unevenness, DEFORM-3D V6.1 software package. [email protected]

On the Deployment of Multistable Kresling Origami-Inspired Structures

2019 ◽  
Author(s):  
Narayanan Kidambi ◽  
K. W. Wang
Keyword(s):  
Mechanical Properties ◽  
Rotation Angle ◽  
Axial Direction ◽  
Deployable Structures ◽  
Dynamic Analyses ◽  
Thin Walled ◽  
Six Degree Of Freedom ◽  
Shape Changes ◽  
Significant Attention ◽  
Walled Cylinder

Abstract Origami designs have attracted significant attention from researchers seeking to develop new types of deployable structures due to their ability to undergo large and complex yet predictable shape changes. The Kresling pattern, which is based on a natural accumulation of folds and creases during the twist-buckling of a thin-walled cylinder, offers a great example for the design of deployable systems that expand uniaxially into tubes or booms. However, much remains to be understood regarding the characteristics of Kresling-based deployable systems, and their dynamics during the deployment process remain largely unexplored. Hence this research investigates the deployment of Kresling origami-inspired structures, employing a full six-degree-of-freedom truss-based model to study their dynamics under different conditions. Results show that tuning the initial rotation angle of a structure gives rise to several qualitatively distinct mechanical properties and stability characteristics, each of which has different implications for the design of the deployable systems. Dynamic analyses reveal the robustness of Kresling structures to out-of-axis perturbations while remaining compliant in the axial direction. These findings suggest that Kresling-based designs can form the basis for the development of new types of deployable structures and systems with tunable performance.

Buckling of Thin-walled Cylinder Shell Specimens with Cut-out Imperfections

2009 ◽  
Vol 96 (6) ◽  
pp. 79-88
Author(s):  
Cheng Zhao ◽  
Hiroshi Matsuda ◽  
Chihiro Morita ◽  
Mei Huang
Keyword(s):  
Thin Walled ◽  
Walled Cylinder

Parameter Inversion of Thin-Walled Structure Using Numerical Optimization Approach

2011 ◽  
Vol 308-310 ◽  
pp. 1614-1618
Author(s):  
Zhuo Meng ◽  
Qin Sun ◽  
Jin Feng Jiang
Keyword(s):  
Numerical Optimization ◽  
Impact Load ◽  
Optimization Approach ◽  
Optimization Software ◽  
Material Parameters ◽  
Finite Element Software ◽  
Whole Process ◽  
Parameter Inversion ◽  
Thin Walled ◽  
Walled Cylinder

Based on the theory of structure impact dynamic and numerical optimization, application of SQP algorithm in nonlinear parameter inversion is demonstrated in this paper by combining the optimization software and finite element software. Parameter inversion of thin-walled cylinder subjected to axial impact load is studied. The material parameters of thin-walled cylinder are obtained from inversion; besides, the whole process of numerical optimization parameter inversed method is demonstrated.

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