Design Of Bracket Research Articles

The Optimization Design of Arm Bracket Structure Topology Based on ANSYS

The detail analysis proposal of the cylinder body is put forward for the automatic tool change mechanism of the QYJ-21 type horizontal machining center. It consists of three main aspects. Firstly, the dimensional model of the cylinders arm bracket portion will be created. Secondly, the topology optimization design of the arm bracket is implemented based on ANSYS Workbench. Finally, meeting the stiffness requirements, the optimal topology shape will be established, for it had the lightest weight.

Simulation and Study on Ultimate Bearing Capacity of Stretcher Bracket for Aeromedical Evacuation

As the important airborne equipment of casualty aeromedical evacuation, the structure design of aeromedical evacuations stretcher bracket not only has to meet the mounting interface in the civil aviation aircraft and meet the medical rescue requirements during the casualty evacuation, and also has the good bearing capacity of limit load. A structure design of frame-type aeromedical evacuations stretcher bracket is presented in this paper. Based on the finite element method (FEM), the ultimate bearing capacity of the bracket attachment of this structure is analyzed with nonlinear mechanics, and then the intensity and stiffness under the case combinations of limit load are simulated and analyzed to ensure the good security and reliability of the stretcher bracket during the casualty aeromedical evacuation.

The Design and Analysis of Bracket of Scraper Part of Coal Mine Underground Horizontal Extension Transfer Machine Based on Solid Works

The paper aims to design a kind of bracket of scraper part of coal mine underground horizontal extension Transfer Machine perfectly, based on Solid Works. And we would like to perform numerical simulation for the bracket, furthermore to optimize the transect parameters and achieve that to reduce the weight of the bracket. At last, through optimization design, we prefer to reduce 4.5% in Von Misses press and 15% in weight. In this way, we can offer a useful reference to design the bracket of scraper part of coal mine underground horizontal extension Transfer Machine.

The Green Design of Bracket of Scraper Part of Coal Mine Underground Horizontal Extension Transfer Machine

Recently, transporting coal in the coal mine is poor efficiency and too costly. Coal mine underground horizontal extension transfer machine is used to transport coal faster and better. To resolve the problem how to connect the scraper conveyer with tramcar in this system, the design of the bracket has been brought up. The bracket of scraper part is the main bearing of coal mine underground horizontal extension transfer machine, and all the scraper conveyer must be fixed in the bracket. In addition, the design of the bracket of scraper part not only considers the rationality in the structure, but also considers the effect of the environment. The system works in extreme circumstances, but the green design can resolve it. It can effectively combine the choice of material, the structure of the bracket, the methods of technology with exterior styling, reflecting the human, machine of harmony with the working environment.

Advanced Materials Application in Flat Television Steering Bracket

This paper mainly talks about the problem of flat television’s placement and the creative design of this automatic steering bracket which designed on the basis of analyzing the existing brackets and aims to make televisions turning around instantly, conveniently and automatically (instead of never moved or hand operated) for people who are watching TV from whichever angle. It is the working of two small electrical motors drives the rotation of the rack at horizontal direction and vertical direction. And only with the help of its remote control can this automatic steering bracket divert the television. The bracket was made of bigger strength aluminum alloy, it is lighter weight, stainless, surface beautiful, compared with traditional processing methods, and selecting aluminum alloy can remarkably improve the production efficiency, ensure product quality and improve the qualification rate of finished products.

Design of Movable Bracket for Dual-Axis Tracking Solar Thermal Power System

Movable bracket as an important part of dual-axis tracking solar thermal power system is large, movable and complex of its force with the orbit of connected nodes. At the same time, the system has strict requirements on removable bracket’s deformation. The technical feasibility and the cost lever of the bracket structure play decisive roles in the promotion of the application of this new type of solar thermal power system. This paper clarifies the applications operation of solar power system on the basis of the principle of the performance of the support structure for the system requirements, summarizes the mechanical characteristics of the bracket structure, combined with the analysis of the pilot project support structure selection, expounds the key points of structural selection, and determines a more reasonable form of the support structure.

Design and Analysis for EPB Shield Bracket Based on Ansys

According to the structural characteristics of EPB shield bracket, the author establishes 3D solid model by Solidworks and corresponding finite element model of the bracket portion which is connected to the cutterhead by ANSYS WORKBENCH software. Through the static analysis of bracket’s stress characteristics under extreme conditions, we get its stress, deformation and safety coefficient distribution law under the maximum constraint conditions. After getting the maximum equivalent stress, the analysis of the calculation results shows that this kind of bracket with good static characteristics can meet the design strength requirement. This paper points out the weak position of bracket’s strength, and provides some reference data for the structural optimization design, as well as some basic data for both the structural design of bracket and the construction maintenance. Moreover, the structure analysis in the process of the grid selection and the key technology of the post-processing method are discussed in detail. The design example shows the effectiveness of the method.

Pareto frontier for simultaneous structural and manufacturing optimization of a composite part

Optimized design of composite structures requires simultaneous optimization of structural performance and manufacturing process. Such a challenge calls for a multi-objective optimization. Here, a generating multi-objective optimization method called normalized normal constraint method, which attains a set of optimal solutions and allows the designer to explore design alternatives before making the final decision, is coupled with a local-global search called constrained globalized bounded Nelder–Mead method. The proposed approach is applied to the design of a Z-shaped composite bracket for optimization of structural and manufacturing objectives. Comparison of the results with non-dominated sorting genetic algorithm (NSGA-II) shows that when only a small number of function evaluations are possible and a few Pareto optima are desired, the proposed method outperforms NSGA-II in terms of convergence to the true Pareto frontier. The results are validated by an enumeration search and by exploring the neighbourhood of the final solutions.

Constrained Globalized Nelder—Mead Method for Simultaneous Structural and Manufacturing Optimization of a Composite Bracket

The optimized design of composite structures is a difficult task. It requires optimizing simultaneously both structural and manufacturing objectives. The objectives do not have closed form solutions and have multiple local optima that calls for a global search. This paper improves the global search method called GBNM [1], which is based on several restarts of the Nelder—Mead method. Two issues are addressed here. First, the restart procedure is improved by using a one-dimensional probability function and a weighted selection procedure. Second, nonlinear constraints are included by projecting the infeasible points onto the nonlinear constraints. The improved procedure is applied to four mathematical test functions. Numerical results show the proposed approach is more efficient in terms of computational time and probability of finding the global minimum. The improved GBNM is then applied to the simultaneous structural and manufacturing design of a Z-shaped composite bracket. The results are compared to those obtained with the genetic algorithm.

New Composite Resilient Member

Article is devoted to development of design and methodic of projecting the new type of resilient member, generated out of composite material. The construction, its schemes of loading, the result of optical and FEM modeling of elastic element, the results of experiences with the designed samples of elastic elements attached. On the basis of the given investigations the authors made the conclusions and recommendations for receiving the demanded characteristics of rigidity during homogeneous mode of deformation-stress of element. The example of design of suspension bracket with use of new type elastics element, created from composite material is resulted.

F. E.-assisted design of the eaves bracket of a cold-formed steel portal frame

Non-linear large-displacement elasto-plastic finite element analyses are used to propose design recommendations for the eaves bracket of a cold-formed steel portal frame. Owing to the thinness of the sheet steel used for the brackets, such a structural design problem is not trivial as the brackets need to be designed against failure through buckling; without availability of the finite element method, expensive laboratory testing would therefore be required. In this paper, the finite element method is firstly used to predict the plastic moment capacity of the eaves bracket. Parametric studies are then used to propose design recommendations for the eaves bracket against two potential buckling modes of failure: (1) buckling of the stiffened free-edge into one-half sine wave, (2) local plate buckling of the exposed triangular bracket area.The results of full-scale laboratory tests on selected geometries of eaves bracket demonstrate that the proposed design recommendations are conservative. The use of the finite element method in this way exploits modern computational techniques for an otherwise difficult structural design problem.

Design, fabrication and testing of a composite bracket for aerospace applications

In this paper the results of a programme, in which a composite bracket as a replacement for a metal forging was developed, will be presented. The finite-element method (FEM) in combination with an optimization module was used to design the bracket. Compared to its metal counterpart, the composite bracket demonstrated a weight reduction of 43%. Two composite brackets were fabricated by resin transfer moulding (RTM). One bracket was loaded statically to 1.38 × Design Ultimate Load. The bracket did not fail at this load level.

A paradigm of the marketplace

C eramic brackets have had a startlingly enthusiastic acceptance by orthodontists. Since the AA0 annual meeting in Montreal in May 1987, millions of brackets have been sold. However, in a discussion with a peer on the brackets’ popularity, the possibiity of patient injury associated with ceramic brackets was mentioned. I called four orthodontic manufacturers for some answers and what I learned caused me some concern. In my opinion there are at least three issues that should be considered. The first and most important has to do with poorly defined risks to orthodontic patients. All company sources agree that every design and type of ceramic bracket can break; the rate of breakage estimated by the manufacturer varies from less than 1% to as much as lo%.* Extrapolation, which is no substitute for research, suggests that tens of thousands of brackets may have fractured during treatment. None of the company representatives interviewed knew whether there has been a case in which injury associated with aspiration or ingestion has occurred. Since aluminum oxide fragments are small and apparently radiolucent, detection of such an incident would be quite difficult. There is apparently no long-term or even short-term study regarding these appurtenances. Three companies claimed they had no report of any injury whatsoever; the other company was somewhat more circumspect, saying that no injury had ever occurred when “bracket removal was done as per company recommendation.” I have heard rumors of enamel damage occurring during debonding, in an accident, or where a bracket comes into occlusion; in some cases the strength of the bond to enamel may exceed that of enamel to dentin. There are anecdotal or hearsay reports suggesting that brackets can be fractured on removal if bracket wings are squeezed with pliers. A high-speed handpiece with a diamond bur must then be used to remove the retained fragments. This may be very time-consuming and annoying to the patient and practitioner. Occlusal forces from chewing or accident also could lead to fracture of the bracket material. These brackets apparently are popular with adult patients and preexisting fracture lines

Begg and straight wire: A combination approach to treatment

Orthodontic appliances should be designed to satisfy goals for denture, patient, and doctor. An appliance that is able to achieve these goals more closely approaches the ideal treatment system. Analysis of appliances of the Begg and straight wire types indicates that each treatment system has significant advantages and that the advantages of one system frequently are the disadvantages of the other. A technique that uses both the tipping principles of Begg and the bodily movement principles of the straight wire type of appliance has been designed and clinically evaluated. The unique capability of the combined treatment approach is in the mechanical design of the new combination four-stage bracket. A description of the appliance and the technique, as well as a clinical case presentation, is included in this article.