Using Finite Element Analysis Method for Determining Equivalent Stress-Strain Relation of Spherical Pressure Head Indentation

2016 ◽  
Vol 13 (5) ◽  
pp. 2732-2738
Author(s):  
Xigui Wang ◽  
Yongmei Wang ◽  
Xuezeng Zhao ◽  
Qiurong Wang ◽  
Hongqi Yu ◽  
...  
2018 ◽  
Vol 7 (2.12) ◽  
pp. 276
Author(s):  
Kye Kwang Choi ◽  
Jae Ung Cho

The objective of this paper is to identify the dangers of damage on drones according to the area of impact and obtain the basic data for improving the durability. The durability by impact according to the weight and speed of the large-size drone is calculated and analyzed using a finite element analysis method with 3D model according to the area of impact. For the analytical results, the possibility of fracture is identified and weak areas are improved through the distribution of equivalent stress and deformation analysis using polyester resin, which is a material used for the drone. The equivalent stresses applied to drones in head-on impact and broadside impact were 296.22MPa and 349.36MPa respectively. The broadside impact producing the highest fracture stress of over 300MPa and the bottom part of the battery pack is limited to a fairly narrow area, so the improvements can be made by reinforcing this area. The great damage may occur from rear impact as the results show 828.28MPa, which is much higher than the fracture stress at rear impact to be the greatest drawback. Also for the deformation results, the values of head-on impact and broadside impact were in the safety range according to the elongation rate, while the drone greatly suffered from deformation and damage in rear impact. At the simulation analysis, the change of material must also be considered along with the change in design for rear collision. It is thought to obtain the basic data for future designing of large-sized drones by referring the results of this research, and it may contribute to the improvement of drone durability. By applying this study result to the drone, it is thought to contribute to the improvement on the durability of drone design due to the area of impact.  


2011 ◽  
Vol 121-126 ◽  
pp. 3230-3233
Author(s):  
Liang Li ◽  
Zhi Ming Feng

In order to control the deformation deviation of automobile panels welding assembly, the author analyzed the assembly process of spot welding, and used a simplified finite element analysis method. In this method, work-pieces’ deviations are reflected by equivalent stress, and welding deformations are simulated by the coupling nodes. The author called C++ application in ANSYS FEA software, using stress data files as the interface, and therefore solved the problem of applying initial stress to automobile panels.


2011 ◽  
Vol 86 ◽  
pp. 574-578
Author(s):  
Zhong Hang Huang ◽  
Bo Tang

For limited condition, the strain gauge was not fixed on the place of the maximum bending stress during the test of the face gear's bending stress in the research of face gear transmission stress analysis. The maximum bending stress was worked out through the finite element analysis method. The results of Finite Element Analysis (FEA) had the equivalent stress in corresponding position with the face gear tested. Then, by comparing the finite element results with the test results and the theoretical maximum stress, FEA was found approaching to the reality, and it provided a method for the analysis of face gear’ maximum bending stress.


2018 ◽  
Vol 55 (4) ◽  
pp. 666-675
Author(s):  
Mihaela Tanase ◽  
Dan Florin Nitoi ◽  
Marina Melescanu Imre ◽  
Dorin Ionescu ◽  
Laura Raducu ◽  
...  

The purpose of this study was to determinate , using the Finite Element Analysis Method, the mechanical stress in a solid body , temporary molar restored with the self-curing GC material. The originality of our study consisted in using an accurate structural model and applying a concentrated force and a uniformly distributed pressure. Molar structure was meshed in a Solid Type 45 and the output data were obtained using the ANSYS software. The practical predictions can be made about the behavior of different restorations materials.


2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Zhenli Yang

With the continuous development of urban construction projects in HebeiProvince, the rise and development of high-rise buildings and undergroundengineering, the design and research of foundation pit support structure has become more and more important. The design of the foundation pit support structure directly affects the settlement and position changes of the building itself and the surrounding stratum. In this paper, the characteristics of foundation pit support are analyzed, and the related theories of finite element analysis method are introduced. Combined with the actual situation of Hebei Province, the finite element analysis method is used to simulate the construction method of foundation pile anchor support structure system. The design was analyzed and studied.


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