Article
Engineering, Mechanical
Nan Wei, Hongling Ye, Xing Zhang, Weiwei Wang, Yunkang Sui
Summary: This paper presents a novel topology optimization method using the independent continuous mapping (ICM) method to design graded lattice structures. The method aims to minimize the volume subject to displacement constraints. Numerical examples demonstrate the lightweight effect of graded lattice structures and validate the effectiveness of the proposed method.
ACTA MECHANICA SINICA
(2022)
Article
Materials Science, Multidisciplinary
Hong-ling Ye, Bo-shuai Yuan, Ji-cheng Li, Xing Zhang, Yun-kang Sui
Summary: A geometrically nonlinear topology optimization method for continuum structures is proposed based on the independent continuous mapping method. The stress constraint problem is studied, and a topology optimization model is established for a lightweight structure with element stress as constraints. The method provides a significant reference for geometrically nonlinear optimization design.
ACTA MECHANICA SOLIDA SINICA
(2021)
Article
Engineering, Civil
Immo Lukas, Ralph Timmers, Melanie Ropele, Robert Lang
Summary: This study investigates the application of non-continuous longitudinal stiffening in crane manufacturing. Experimental tests were conducted on 50 scaled plates with non-continuous longitudinal stiffening, subjected to uniform compression, to characterize their structural behavior. The study concludes that the gap significantly affects the ultimate resistance, usually resulting in a triangular-shaped buckling mode.
THIN-WALLED STRUCTURES
(2023)
Article
Mathematics, Applied
Nan Chen, Yuchen Li, Evelyn Lunasin
Summary: The article proposes an efficient data assimilation scheme combined with reduced order modeling techniques, showing effectiveness in capturing nonlinear features of turbulence and being more accurate and computationally cheaper than standard ensemble Kalman filter and nudging data assimilation schemes.
Article
Engineering, Multidisciplinary
Hongling Ye, Zonghan Li, Nan Wei, Pengfei Su, Yunkang Sui
Summary: Fatigue failure is a common failure mode in engineering applications under cyclic loads, often occurring without clear signals. By conducting fatigue topology optimization design, it is possible to prevent fatigue failure during the conceptual design stage of structures, ultimately enhancing structural durability. Numerical examples have shown the practicality and effectiveness of this method in avoiding fatigue failure.
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES
(2021)
Article
Materials Science, Composites
Pham Thanh Hieu, Hoang Van Tung
Summary: The buckling and postbuckling behavior of thin composite cylindrical shells reinforced by CNTs under uniform temperature rise were investigated in this article. The study found that volume fraction, distribution type of CNTs, geometrical parameters, degree of tangential edge constraint, buckling mode, and surrounding elastic media all have effects on the buckling temperatures and postbuckling strength.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2021)
Article
Engineering, Mechanical
Haoqing Ding, Bin Xu
Summary: This paper presents an integrated optimization model for minimizing local response of composite plates in a given frequency band using the discrete-continuous parameterization model (DCP), offering a flexible design space for selecting fiber angles. Additionally, the use of the solid isotropic material with penalty scheme (SIMP) to optimize the layout of damping material and consideration of low-order resonant peak constraint are discussed. The mode acceleration method (MAM) and decoupled sensitivity analysis method are integrated for frequency and sensitivity analysis in this developed model.
INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN
(2021)
Article
Mechanics
L. T. Nhu Trang, H. Van Tung
Summary: This paper investigates the simultaneous influences of porosities, tangential constraints of boundary edges, surrounding elastic media, and elevated temperature on the buckling and postbuckling behaviors of a functionally graded toroidal shell segment. The study finds that tangential edge restraints have both beneficial and detrimental effects on the stability of the torsion-loaded shells. The shear layer and the elastic layer of the surrounding medium respectively enhance and alleviate the buckling resistance capacity and severity of the snap-through response of the torsion-loaded porous FGM toroidal shell segment.
ARCHIVES OF MECHANICS
(2023)
Article
Mathematics
S. B. Filippov
Summary: The buckling of a thin cylindrical shell supported by identical annular plates under uniform external pressure is analyzed using an asymptotic method and free support conditions. The approximate solutions to the eigenvalue problem are obtained as a sum of slowly varying functions and edge effect integrals. It is shown that in the zeroth approximation it is possible to replace a narrow plate with a circular beam, and as the plate width increases, the stiffness of the corresponding spring tends to a constant.
VESTNIK ST PETERSBURG UNIVERSITY-MATHEMATICS
(2021)