Computational study on interfacial peeling by uniformly distributed loading on aluminum hybrid anti-mechanical vibration panel

2020 ◽  
Vol 34 (07n09) ◽  
pp. 2040043
Author(s):  
Sung-Min Yoon ◽  
Sung-Youl Bae ◽  
Yun-Hae Kim
Keyword(s):  
Stress State ◽  
Stress Distribution ◽  
Loading Condition ◽  
Computational Study ◽  
Mechanical Vibration ◽  
Interfacial Area ◽  
Main Interest ◽  
Mechanical Parts ◽  
Product Thickness

The purpose of this case study is to calculate the critical condition of interfacial peeling on aluminum hybrid anti-mechanical vibration panel. An area of thin-cored resin layer with two aluminum skins is located to design a hybrid panel. The system of hybrid panel is normally used for mechanical parts, which need to dampen mechanical vibration. In this structure, a thin core plays an especially important role to dampen vibration. However, this structure has a disadvantage of delaminating and peeling with perpendicular loading from the adhesive core. At a given level of adhesion, one calculates deflection and stress state as a function of loading. To confirm that this model is directly applicable to the quantity of deflection, the geometry of three layers is designed with actual product thickness. A total of five cases of loading condition are simulated to deduce the stress distribution. The interfacial area is the main interest for this simulation which can be related with critical peeling condition. As a result, the comparison with the practical values of adhesion shows a possibility of estimation for the peeling limit of this hybrid panel system.

Literary Representations of Female Identity

2002 ◽  
Vol 19 (4) ◽  
pp. 23-41
Author(s):  
Safoi Babana-Hampton
Keyword(s):  
Related Problem ◽  
Female Identity ◽  
Literary Representations ◽  
Main Interest ◽  
Female Relationships ◽  
Arab Muslim ◽  
Feminine Writing ◽  
The Given ◽  
Female Experience

The essay examines the texts of the two women writers - Leila Abouzeid (from Morocco) and Nawal El Saadawi (from Egypt) - as offering two female perspectives within what is commonly referred to as "feminine" writing in the Arab Muslim world. My main interest is to explore the various discursive articulations of female identity that are challenged or foregrounded as a positive model. The essay points to the serious pitfalls of some feminist narratives in Arab-Muslim societies by dealing with a related problem: the author's setting up of convenient conceptual dichotomies, which account for the female experience, that reduce male-female relationships in the given social context to a fundamentally antagonistic one. Abouzeid's novel will be a case study of a more positive but also realistic and complex perspec­tive on female experience ...

scholarly journals Location Decision Making and Transportation Route Planning Considering Fuel Consumption

2019 ◽  
Vol 5 (2) ◽  
pp. 27 ◽  
Author(s):  
Chalermchat Theeraviriya ◽  
Rapeepan Pitakaso ◽  
Kittima Sillapasa ◽  
Sasitorn Kaewman
Keyword(s):  
Fuel Consumption ◽  
Palm Oil ◽  
Processing Time ◽  
Computational Study ◽  
Exact Method ◽  
Neighborhood Search ◽  
Fixed Cost ◽  
Location Routing ◽  
Consumption Cost

This study presents the Location Routing Problem (LRP) for which we have created a model for the integration of locating facilities and vehicle routing decisions to solve the problem. The case study is the Palm Oil Collection Center, which is also important for the supply chain system. A mathematical model was made to minimize the total cost of a facility-opening cost, fixed cost of vehicle uses and fuel consumption cost. The fuel consumption cost relies on the distance and road conditions, in case of poor physical condition of a road, and its width, which can be affected the speed of the vehicle as well as the used fuel. Thus, we propose an Adaptive Large Neighborhood Search (ALNS) based on heuristic for solving the LRP. The ALNS method was tested with three datasets of samples divided into small, medium and large problems. Then, the results were compared with the results from the exact method by the Lingo program. The computational study indicated that the ALNS algorithm was competitive to the results of the Lingo for all instance sizes. Moreover, the ALNS was more effective than the exact method; approximately 99% in terms of processing time. We extended this approach to solve the case study, which was considered to be the largest problem, and the ALNS algorithm was efficient with acceptable solutions and short processing time. Therefore, the proposed method provided an effective solution to manage location routing decision of the palm oil collection center.

On the estimation of frost loads

1996 ◽  
Vol 33 (4) ◽  
pp. 629-641 ◽  
Author(s):  
B Rajani ◽  
C Zhan
Keyword(s):  
Key Words ◽  
Loading Condition ◽  
Sensitivity Analyses ◽  
Buried Pipe ◽  
Buried Pipes ◽  
Field Case ◽  
Frost Depth ◽  
Trench Width

Frost load is an important loading condition to consider for the design of buried pipes. Though frost loads can be much greater than earth loads, it is not presently possible to estimate frost loads except using heuristic arguments. This paper describes the development of simplified methods to estimate frost load. Important variables are identified that can explain how the effects of frost loading can be mitigated. Sensitivity analyses are presented to highlight the importance of the different variables involved in the simplified methods. Frost loads measured in a field case study are compared with calculated frost loads in trenches with clay and sand backfills. Key words: frost load, frost depth, buried pipe, trench backfills, trench width.

Employing Cold Spray to Alter the Residual Stress Distribution of Workpieces: A Case Study on Fusion-Welded AA2219 Joints

2020 ◽  
Vol 29 (6) ◽  
pp. 1538-1549
Author(s):  
W. Y. Li ◽  
Y. F. Zou ◽  
F. F. Wang ◽  
X. W. Yang ◽  
Y. X. Xu ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Cold Spray ◽  
Residual Stress Distribution

scholarly journals Development of a numerical workflow based on <i>μ</i>-CT imaging for the determination of capillary pressure–saturation-specific interfacial area relationship in 2-phase flow pore-scale porous-media systems: a case study on Heletz sandstone

Solid Earth ◽  
2016 ◽  
Vol 7 (3) ◽  
pp. 727-739 ◽  
Author(s):  
Aaron Peche ◽  
Matthias Halisch ◽  
Alexandru Bogdan Tatomir ◽  
Martin Sauter
Keyword(s):  
High Resolution ◽  
Pore Size ◽  
Capillary Pressure ◽  
Interfacial Area ◽  
Scale Model ◽  
Phase Flow ◽  
Pore Scale ◽  
Pore Size Distributions ◽  
Phase Saturation

Abstract. In this case study, we present the implementation of a finite element method (FEM)-based numerical pore-scale model that is able to track and quantify the propagating fluid–fluid interfacial area on highly complex micro-computed tomography (μ-CT)-obtained geometries. Special focus is drawn to the relationship between reservoir-specific capillary pressure (pc), wetting phase saturation (Sw) and interfacial area (awn). The basis of this approach is high-resolution μ-CT images representing the geometrical characteristics of a georeservoir sample. The successfully validated 2-phase flow model is based on the Navier–Stokes equations, including the surface tension force, in order to consider capillary effects for the computation of flow and the phase-field method for the emulation of a sharp fluid–fluid interface. In combination with specialized software packages, a complex high-resolution modelling domain can be obtained. A numerical workflow based on representative elementary volume (REV)-scale pore-size distributions is introduced. This workflow aims at the successive modification of model and model set-up for simulating, such as a type of 2-phase problem on asymmetric μ-CT-based model domains. The geometrical complexity is gradually increased, starting from idealized pore geometries until complex μ-CT-based pore network domains, whereas all domains represent geostatistics of the REV-scale core sample pore-size distribution. Finally, the model can be applied to a complex μ-CT-based model domain and the pc–Sw–awn relationship can be computed.

Algorithm Research of Two-Dimensional Size Measurement on Parts Based on Machine Vision

2013 ◽  
Vol 694-697 ◽  
pp. 1945-1948 ◽  
Author(s):  
Cai Hua Li ◽  
Jin Bo Zhang ◽  
Xiao Ping Hu ◽  
Guo Fu Zhao
Keyword(s):  
Machine Vision ◽  
Rapid Development ◽  
Measurement Technology ◽  
Size Measurement ◽  
Mechanical Parts ◽  
Fast Speed ◽  
Circle Center ◽  
Complex Parts ◽  
Machine Processing

With the rapid development of computer science, image processing, and pattern recognition, people are paying more and more attention on research and application of machine vision, which has resulted in excellent results in many fields. Depending on the features of untouched, fast-speed, real-time, proper precision, anti-interference, the inspection technology based on machine vision has been researched deeply and comprehensive applied aboard. Recently, the size measurement technology based on machine vision has been applied in the size measurement of the machine processing parts. A case study of typical regular mechanical parts, algorithm of position and size measurement of line, circle center and radius are researched, and good results are got, which established an academic foundation for further measurement of complex parts.

scholarly journals Maintainability Approach: Hydraulic Pump with External Gears Explored with Design for Disassembly and Augmented Reality

2021 ◽  
Vol 11 (2) ◽  
pp. 666
Author(s):  
Angelica Lucia Ritucci ◽  
Leonardo Frizziero ◽  
Alfredo Liverani
Keyword(s):  
Augmented Reality ◽  
Preventive Maintenance ◽  
Target Component ◽  
Hydraulic Pump ◽  
Design For Disassembly ◽  
Handheld Device ◽  
Mechanical Parts ◽  
Disassembly Sequence ◽  
Metaheuristic Methods

The work carried out has the purpose of improving and optimizing various industrial technical operations, such as preventive maintenance, taken here as an example of application, using the Design for Disassembly (DfD) technique. Therefore, through four metaheuristic methods that have been chosen among the most widespread in the field (described below) to make a comparison between them, the optimal disassembly sequence is sought, if it exists, in terms of time and then costs in order to extract a target component without damaging the other mechanical parts of the assembly. The hypothesis that has been tested throughout this case study is “a responsible application of DfD, not only from the design process of a product but also during the disassembly procedure, can bring substantial benefits to the company”. Interaction with a hypothetical operator in charge of the work to be performed is implemented with the use of augmented reality. In fact, through an application programmed for an Android device (in this case, a mobile phone, hence a handheld device), the operator can be instructed step-by-step on the disassembly sequence in dynamics as an animation. Finally, two virtual buttons were added in augmented reality with which the operator can start and pause/resume the animation at any time to facilitate the understanding of the different steps established by the sequence.

Sign in / Sign up

Export Citation Format

Share Document