Stress distribution in a glassfiber-reinforced plastic shell structure under impulsive transverse loading

2009 ◽  
Vol 45 (4) ◽  
pp. 443-447 ◽  
Author(s):  
P. Z. Lugovoi ◽  
V. V. Sivak ◽  
V. F. Sivak
Keyword(s):  
Stress Distribution ◽  
Shell Structure ◽  
Plastic Shell ◽  
Transverse Loading ◽  
Reinforced Plastic

Rotor optimization for the improvement of ultrasonic motor performance

2019 ◽  
Vol 233 (19-20) ◽  
pp. 7089-7100 ◽  
Author(s):  
Zhangfan Xu ◽  
Sisi Di ◽  
Song Pan ◽  
Lei Chen ◽  
Weiqing Huang
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Shell Structure ◽  
Motor Performance ◽  
Thin Shell ◽  
Element Model ◽  
Ultrasonic Motor ◽  
Comsol Multiphysics ◽  
New Approach ◽  
The Relationship

The rotor deformation of an ultrasonic motor is an important factor affecting its performance. However, little research focuses on the relationship between the rotor deformation and motor performance. This paper provides an approach to improve the ultrasonic motor's output properties by changing the rotor's size from the view of proper rotor deformation and better stress distribution on the interface. First, a thin shell structure is introduced to study the deformation of the rotor. A finite element model of the motor is built in COMSOL Multiphysics software for the contact analysis of the stress distribution. Then, the optimized ranges of parameters are determined by simulation. Frictional experiments are conducted to verify the feasibility of the rotor under the optimized size. Finally, the performance experiments of a stator corresponding to different sizes of rotor are carried out. The experimental results show that the speed, the power and the efficiency of the optimized rotor are all increase. These results prove the effectivity of the new approach to improving the performance of the ultrasonic motor.

Optimization of a reinforced plastic shell with allowance for geometrically nonlinear factors

1979 ◽  
Vol 14 (6) ◽  
pp. 868-872
Author(s):  
V. L. Narusberg ◽  
R. B. Rikards ◽  
G. A. Teters
Keyword(s):  
Plastic Shell ◽  
Geometrically Nonlinear ◽  
Reinforced Plastic

scholarly journals Stress Distribution in Microregion of Core–Shell Structure Lightweight Aggregate Concrete

Buildings ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 540
Author(s):  
Meng Zhu ◽  
Lihua Zhang ◽  
Weilong Wang ◽  
Hongping Zhang ◽  
Wenjin Xing
Keyword(s):  
Stress Distribution ◽  
Shell Structure ◽  
Shell Thickness ◽  
Lightweight Aggregate ◽  
Thickness Ratio ◽  
Core Shell ◽  
Distribution Analysis ◽  
Failure Resistance ◽  
The Core ◽  
Core Shell Structure

An in-depth understanding of the effect of cordierite/belite core–shell structure lightweight aggregate (CSLWA) on the mechanical performance of LWA concrete (LWAC) is critical for improving the failure resistance of LWAC. In this study, the stress distribution of the microregion in CSLWA was systematically investigated via a finite element analysis to explore its effect on the mechanical properties of LWAC. In detail, the material components, core–shell thickness ratio, porosity and width of interfacial transition zone (ITZ), and absence or presence of interfacial bonding zone (IBZ) were considered during the stress distribution analysis of the microregion of LWAC. The results showed that a reduction in the material components, with a high-elastic modulus in the core, a decrease in the core–shell thickness ratio, and the formation of the core–shell IBZ are beneficial for optimizing the stress distribution of the microregion and alleviating the stress concentration phenomenon of LWAC. Moreover, due to the continuous hydration of belite shell, the ITZ of CSLWA becomes increasingly dense, thus the stress distribution is more uniform than that of ordinary LWAC, indicating that CSLWA exhibits the potential to improve the failure resistance of LWAC. This study helps to develop an understanding of the role played by the core–shell structure in improving the toughness of LWAC, and provides a new solution and methodology for improving the brittleness of LWAC.

Effect of a local load on an orthotropic glass-reinforced plastic shell

1972 ◽  
Vol 6 (1) ◽  
pp. 80-85 ◽  
Author(s):  
V. V. Vasil'ev
Keyword(s):  
Local Load ◽  
Plastic Shell ◽  
Reinforced Plastic

Study on glass-reinforced-plastic shell roofing

1978 ◽  
Vol 13 (4) ◽  
pp. 556-561
Author(s):  
G. I. Brankov ◽  
P. Marinov
Keyword(s):  
Plastic Shell ◽  
Reinforced Plastic

Equilibrium Displacement and Stress Distribution in a Two-Dimensional, Axially Moving Web Under Transverse Loading

1995 ◽  
Vol 62 (3) ◽  
pp. 772-779 ◽  
Author(s):  
C. C. Lin ◽  
C. D. Mote
Keyword(s):  
Stress Distribution ◽  
Plate Theory ◽  
Transverse Load ◽  
Transverse Displacement ◽  
Transverse Loading ◽  
Closed Form Solutions ◽  
Coupled Equations ◽  
Axially Moving ◽  
Axially Moving Web ◽  
The Web

Von Karman nonlinear plate equations are modified to describe the motion of a wide, axially moving web with small flexural stiffness under transverse loading. The model can represent a paper web or plastic sheet under some conditions. Closed-form solutions to two nonlinear, coupled equations governing the transverse displacement and stress function probably do not exist. The transverse forces arising from the bending stiffness are much smaller than those arising from the applied axial tension except near the edges of the web. This opens the possibility that boundary layer and singular perturbation theories can be used to model the bending forces near the edges of the web when determining the equilibrium solution and stress distribution. The present analysis is applied to two examples: (I) a web deflecting under its own uniformly distributed weight; (II) a web deflecting under a transverse load whose distribution is described by the product of sine functions in the axial and width directions. Membrane theory and linear plate theory solutions are used to characterize the importance of the web deformation solutions.

The effect of microstructure of unidirectional fibre-reinforced composites on mechanical properties under transverse loading: A review

2018 ◽  
Vol 37 (22) ◽  
pp. 1360-1377 ◽  
Author(s):  
Rui Cai ◽  
Tan Jin
Keyword(s):  
Fibre Volume ◽  
Reinforced Composites ◽  
New Materials ◽  
Transverse Loading ◽  
Excellent Performance ◽  
Bonding Quality ◽  
Reinforced Plastic ◽  
Low Weight ◽  
Unidirectional Fibre ◽  
Fibre Reinforced Composites

Unidirectional fibre-reinforced composites are increasingly used in the sectors of aerospace, automotive, construction, marine and other technical applications over the decades due to their low weight, high mechanical, thermal properties and high corrosion resistance. As a result, the understanding of mechanisms of their fracture and failure under different loads especially under transverse loading are very important in order to take full advantage of their excellent performance, to optimise production procedures and to develop new materials with higher performance. This paper reviewed the effects of the microstructure of a composite material (including fibre volume, fibre distribution, bonding quality between fibres and matrix and characteristics of matrix) on the performance of fibre-reinforced plastic composites according to mechanics theories and finite element method for microstructure analysis.

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