Distribution and Properties of Shear Stress in Elastic Beams with Variable Cross Section: Theoretical Analysis and Finite Element Modelling

The internal impedance and radiation impedance of a variable cross-section diffsorber were calculated, when adding bandage to the nozzles of tubes of diffsorber, or using non-linear sound resistance to provide appropriate additional internal resistance, the diffsorber will become an excellent sound absorber. Without bandage, the absorption coefficient of the testing sample is larger than 0.7 during 100Hz-2000Hz, and exceed 1 during 500Hz-800Hz; with bandage, the absorption coefficient of the testing samples is no less than 0.8 during 250Hz-4000Hz, and is above 1 during 250Hz-2000Hz. The performance of absorption begins to reduce from 5000Hz to higher frequency due to the mismatch of internal impedance and radiation impedance.

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Finite Element Simulation of Chain-Die Forming U Profiles with Variable Cross-Section

Materials Science Forum ◽

10.4028/www.scientific.net/msf.898.1177 ◽

2017 ◽

Vol 898 ◽

pp. 1177-1182 ◽

Cited By ~ 3

Author(s):

Y.G. Li ◽

Y. Sun ◽

H.L. Huang ◽

D.Y. Li ◽

S.C. Ding

Keyword(s):

Finite Element ◽

Cross Section ◽

Low Cost ◽

High Strength Steels ◽

High Strength ◽

Variable Cross Section ◽

Roll Forming ◽

Variable Cross ◽

Advanced High Strength Steels ◽

Die Forming

Roll forming has been widely used to manufacture constant cross-section products because of high quality, efficiency and low cost. It is quite epidemic in producing automobile parts made of advanced high strength steels (AHSS) nowadays. However, with the development of the vehicle industry and diversity of the products, variable cross-section profiles have attracted more and more attention. The traditional roll forming technique is difficult to meet the requirements. Chain-die forming which was introduced in recent years makes it possible. Chain-die forming is an extension of roll forming and its key characteristic is enlarging the rotation radii of the moulds, by which the deformation zone is extended. The study focused on the finite element simulations of Chain-die forming U profiles with variable cross-section, including variable width and height. The feasibility of Chain-die forming producing variable cross-section products was verified by the perfect simulation results. The advantage of Chain-die forming was that there was no need to design the intermediate moulds except the finished-profile ones, which reduced the mould quantity immensely. Then the cost was lower.

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Shape sensing of variable cross-section beam using the inverse finite element method and isogeometric analysis

Measurement ◽

10.1016/j.measurement.2020.107656 ◽

2020 ◽

Vol 158 ◽

pp. 107656 ◽

Cited By ~ 3

Author(s):

Feifei Zhao ◽

Libo Xu ◽

Hong Bao ◽

Jingli Du

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Cross Section ◽

Isogeometric Analysis ◽

Variable Cross Section ◽

Variable Cross ◽

Inverse Finite Element Method ◽

Shape Sensing ◽

Element Method

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Elastic-Plastic Finite Element Simulation of Bulge Forming Process Using a Variable Cross-Section Solid Bulging Mold

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.189-193.4405 ◽

2011 ◽

Vol 189-193 ◽

pp. 4405-4408

Author(s):

Ke Wang ◽

Zhe Ying Wang ◽

Xing Wei Sun

Keyword(s):

Finite Element ◽

Cross Section ◽

Metal Flow ◽

Three Dimensional ◽

Variable Cross Section ◽

Flow Mode ◽

Variable Cross ◽

Forming Process ◽

Element Analysis ◽

Screw Rotor

Bulge forming is a novel process aimed at common products including T-branches, cross branches and angle branches. But bulging forming has not applied for two-head abnormity-shaped hollow screw rotor reported in literature. Simulation of the bulging forming of two-head abnormity-shaped hollow screw rotor has not been reported. This paper presents a simulation of the bulge forming process of two-head abnormity-shaped hollow screw rotor using a variable cross-section solid bulging mold. Some conditions including the effect of friction, boundary conditions, contact conditions and the space motion, etc are presented. The mathematical model of three-dimensional finite element analysis has been established. The distribution of generalized plastic strain and general metal flow mode in cross section of two abnormity-shaped hollow screw rotor has been analyzed. It is an effective method for the analysis of other defects and the optimization of process parameters further.

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Stress Wave Propagation Analysis in One-Dimensional Micropolar Rods with Variable Cross-Section Using Micropolar Wave Finite Element Method

International Journal of Applied Mechanics ◽

10.1142/s1758825118500394 ◽

2018 ◽

Vol 10 (04) ◽

pp. 1850039 ◽

Cited By ~ 9

Author(s):

Mohsen Mirzajani ◽

Naser Khaji ◽

Muneo Hori

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Wave Propagation ◽

Cross Section ◽

Variable Cross Section ◽

Stress Wave Propagation ◽

Rotational Degree ◽

Variable Cross ◽

One Dimensional ◽

Element Method

The wave finite element method (WFEM) is developed to simulate the wave propagation in one-dimensional problem of nonhomogeneous linear micropolar rod of variable cross-section. For this purpose, two kinds of waves with fast and slow velocities are detected. For micropolar medium, an additional rotational degree of freedom (DOF) is considered besides the classical elasticity’s DOF. The proposed method is implemented to solve the wave propagation, reflection and transmission of two distinct waves and impact problems in micropolar rods with different layers. Along with new solutions, results of the micropolar wave finite element method (MWFEM) are compared with some numerical and/or analytical solutions available in the literature, which indicate excellent agreements between the results.

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