Bidirectional evolutionary optimization design of material stiffness for the uniformity of the contact stress

2021 ◽  
pp. 104288
Author(s):  
Yicong Zhou ◽  
Qiyin Lin ◽  
Jun Hong ◽  
Nan Yang
Keyword(s):  
Contact Stress ◽  
Optimization Design ◽  
Evolutionary Optimization ◽  
Material Stiffness

Contact Stress Analysis and Optimization Design of Ball Cage Patterned Constant Speed Universal Joint

2013 ◽  
Vol 785-786 ◽  
pp. 1172-1175 ◽  
Author(s):  
Yun Guang Cai ◽  
Yan Li ◽  
Yao Chen Shi
Keyword(s):  
Stress Analysis ◽  
Contact Stress ◽  
Optimization Design ◽  
Maximum Stress ◽  
Constant Speed ◽  
Design Parameters ◽  
Universal Joint ◽  
Weak Part ◽  
Modeling Software ◽  
Raceway Design

This paper takes ball cage patterned constant speed universal joint of as the research object. Using the 3 d modeling software solidworks to establish solid model and simplified it . Based on ANSYS, do finite element contact stress analysis by the universal joint of the two kinds of condition. find out the weak part,through the improvement of raceway design parameters, Relieve the stress concentration phenomenon, reduces the maximum stress, increases the service life of universal joint.

scholarly journals An Optimized Design Research Based on Variable-lead Spiral Pair of Contact Stress and Elasto-hydrodynamic Lubrication State

Mechanika ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 42-50
Author(s):  
He Fei ◽  
Xu Xie ◽  
Zhang Ben Tao ◽  
Yang Ke
Keyword(s):  
Angular Velocity ◽  
Contact Stress ◽  
Optimization Design ◽  
Design Research ◽  
Hydrodynamic Lubrication ◽  
Contact Analysis ◽  
Optimized Design ◽  
Lead Screw ◽  
Lubrication Characteristics ◽  
Motion Characteristics

Abstract: Variable-lead spiral pair mainly includes spiral wire and  spiral roller. Design of variable-lead helix firstly conforms to the motion characteristics of variable-lead screw drive and nut-connected mechanism, then comes to lead function of the variable lead helix. At the same time, according to the range of screw lead angle and pressure angle, the angular velocity of spiral wire rod and the radius of spiral wire are concluded. Finally come to the parameter equation of helix. Then, the contact analysis and lubrication characteristics of the variable-lead helical pair are analyzed to design the helical roller with the minimum contact stress and the condition of the elasto-hydrodynamic lubrication. The radius of the variable-lead helical roller and the selectable range of the bus length are obtained. Finally, an example is given to illustrate the application of the variable-lead spiral pair in the subway door system, and the optimization design of the variable-lead spiral pair is realized.

Bi-objective optimization design of material stiffness for improving contact interface performances

2020 ◽  
pp. 095440622097543
Author(s):  
Yicong Zhou ◽  
Qiyin Lin ◽  
Jun Hong ◽  
Nan Yang
Keyword(s):  
Contact Pressure ◽  
Contact Area ◽  
Optimization Design ◽  
Variable Stiffness ◽  
Contact Interface ◽  
Stiffness Optimization ◽  
Material Stiffness ◽  
Effective Contact ◽  
Stiffness Design ◽  
Distribution Uniformity

The characteristics of contact interfaces such as the distribution uniformity of the contact pressure and the effective contact area play a crucial role in engineering equipment. To investigate the influences of the variable material stiffness optimization (VMSO) design on the contact characteristics of the contact interfaces in an assembly, an heuristic-based VMSO algorithm is developed in this paper. A bi-objective function is defined by including both the distribution uniformity of the contact pressure and the effective contact area. A single bolted joint model is adopted as a design example. The results indicate that optimizing the stiffness of the materials around the contact interface is an effective approach to enhance the distribution uniformity of the contact pressure, increase the effective contact area and decrease the maximum contact pressure. Furthermore, the improvement effectiveness provided by the proposed variable stiffness design is better than that provided by the traditional variable thickness design.

Analyzing the Contacting Stresses of Ball in Servo Disc Brake

2013 ◽  
Vol 419 ◽  
pp. 280-285
Author(s):  
Jin Yue Tian ◽  
Zheng Ning Ren ◽  
Jin Wei Wang ◽  
Jin Yu Yao ◽  
Shi Xin Lan ◽  
...  
Keyword(s):  
Stress Distribution ◽  
Theoretical Analysis ◽  
Contact Stress ◽  
Contact Surface ◽  
Optimization Design ◽  
Three Dimensional ◽  
Elastic Displacement ◽  
Disc Brake ◽  
Ball Bearings

The ball's stress distribution in tractor servo disc brake usually is three dimensional in tractor. In this article,the contact theoretical analysis is used to calculate the contact face action distribution between the saddle ball bearings, the elastic displacement, train and stress distributed situation was determined in contact surface. The results show that the method is completely feasible, this method was suitable similarly for the solution contact stress question, the data has provided the important reference for the contact face optimization design.

The Novel Compound Evolutionary Optimization Algorithm with Hybrid Discrete Variables and its Application to Mechanical Optimization

2010 ◽  
Vol 97-101 ◽  
pp. 3276-3280 ◽  
Author(s):  
You Xin Luo
Keyword(s):  
Optimization Algorithm ◽  
Optimization Design ◽  
High Efficiency ◽  
Evolutionary Optimization ◽  
Discrete Variables ◽  
Artificial Fish Swarm Algorithm ◽  
Complex Functions ◽  
Artificial Fish Swarm ◽  
Swarm Algorithm ◽  
Mechanical Optimization

To overcome the problem of low convergence speed and sensitivity to local convergence with the traditional Artificial Fish-swarm Algorithm (AFSA) to handle complex functions, a novel compound evolutionary algorithm, called AFS-EMPCEOA, was introduced which is combined Artificial Fish-swarm Algorithm with the Elite Multi-parent Crossover Evolutionary Optimization Algorithm (EMPCEOA) that is GuoTao Algorithm improved by elite multi-parent crossover method. AFSEMPCEOA algorithm program with hybrid discrete variables was also developed. The computing example of mechanical optimization design shows that this algorithm has no special requirements on the characteristics of optimal designing problems, which has a fairly good universal adaptability and a reliable operation of program with a strong ability of overall convergence and high efficiency.

Optimization Design of Forging Die for Supporting Bar Based on DEFORM-3D

2012 ◽  
Vol 602-604 ◽  
pp. 1869-1873
Author(s):  
Lei Fu ◽  
Li Lin
Keyword(s):  
Contact Stress ◽  
Optimization Design ◽  
Working Life ◽  
Work Piece ◽  
Die Structure ◽  
Die Stress ◽  
Simulation Results ◽  
3D Solid ◽  
Forging Die ◽  
Deform 3D

On the basis of analyzing the process of supporting bar forging conform, the 3D solid geometries modeling of billet and die were constructed by SOLIDWORKS software, the distributions of die stress and contact stress on the process of supporting bar forging conform were analyzed by using DEFORM-3D program. The working life of the die punch was assessed. The die structure was optimized based on the simulation results, and the forging defect of the improved work piece could be well controlled and the die working life was improved to about 10%.

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