SolidWorks Modeling Research Articles

Comparison of frictional resistance between passive self-ligating brackets and slide-type low-friction ligature brackets during the alignment and leveling stage.

BackgroundTo compare the frictional resistance between passive self-ligating brackets and conventional brackets with low-friction ligature under bracket/archwire and root/bone interface during dental alignment and leveling.Material and MethodsA tridimensional model of the maxilla and teeth of a patient treated with conventional brackets, and slide ligatures was generated employing the SolidWorks modeling software. SmartClip self-ligating brackets and Logic Line conventional brackets were assembled with slide low-friction ligatures, utilizing archwires with different diameters and alloys used for the alignment and leveling stage. Friction caused during the bracket/archwire interface and stress during the bone/root interface were compared through a finite element model.ResultsSmartClip and Logic Line brackets with slide elastomeric low-friction elastomeric ligature showed similar frictional stress values of 0.50 MPa and 0.64 MPa, respectively. Passive self-ligating brackets transmitted a lower load along the periodontal ligament, compared to conventional brackets with a low-friction ligature.ConclusionsSlide low-friction elastomeric ligatures showed frictional forces during the bracket/archwire interface similar to those of the SmartClip brackets, while the distribution of stresses and deformations during the root/bone interface were lower in the passive self-ligating brackets. Key words:Orthodontic friction, finite element analysis, orthodontic brackets, orthodontic wires.

S1 Pedicle Subtraction Osteotomy in Sagittal Balance Correction. A Feasibility Study on Human Cadaveric Specimens

A cadaveric feasibility study was carried out. Osteotomies to correct fixed sagittal imbalance are usually performed at L3/ L4. To investigate the feasibility of S1 pedicle subtraction osteotomy to correct spinal deformity and spinopelvic parameters, achieving better results with more limited exposure. The data obtained will allow a fixation construct specific for this osteotomy to be designed. S1 pedicle subtraction osteotomy was performed on 12 cadaveric specimens. Baseline and postprocedural computed tomography and biomechanical studies were performed. Data were analyzed with a fixation system SolidWorks model, and the redesigned fixation construct was described and analyzed with an ANSYS model. S1 pedicle subtraction osteotomy is technically feasible. The fixation can be achieved with L4, L5, and iliac screws connected with bars. The system can be reinforced with a polyetheretherketone cage placed anteriorly in the S1 body osteotomy site, a cross-connecting bar, a double iliac screw, or an anterior interbody cage placed at the L5-S1 disc. The fixation strength is improved by angulating the iliac rod channel 10°, adding a semi-sphere to the locking screw contact surface and 2 fins to its saddle. The redesigned construct showed suitable stress and deformation levels, achieving the expected biomechanical requirements. Compared with surgery on higher levels, S1 pedicle subtraction osteotomy allows greater correction with shorter fixation, because the osteotomy is performed at a more caudal level, modifying the spinopelvic parameters. S1 pedicle subtraction osteotomy is technically feasible. Finite element analysis results indicate that it has appropriate biomechanical properties.

Analysis of particle behavior inside the classifier of a Raymond Bowl Mill while co-milling woody biomass with coal

Woody biomass cofiring with coal at existing pulverized-coal boilers is known to be a green energy source and is a low-expense alternative for pure coal combustion. Co-milling woody biomass particles (15 wt%) with coal particles (85 wt%) before burning at a boiler is a complex problem because large woody biomass particles (>300 μm) exit the milling system along with the fine particles. A Computational Particle Fluid Dynamics (CPFD) is used in this paper to present a novel analysis about the behavior of woody biomass particles as they are mixed with coal particles inside the classifier. To meet this objective, a model of SolidWorks of the milling system is defined using the Barracuda VR 17.1.0 software package. We made a C# programming code to analyze the post processing files of this simulation (base simulation); it showed that approximately none of the large particles of woody biomass nor any of the coal particles that exit along with fine particles swirl inside the classifier, and they exit the system in the product stream immediately after getting through the vanes. More importantly, only a few numbers of the exiting particles, regardless of their size, swirl inside the classifier. Manipulation of hardware can improve the classifier performance and leads to changes in the behavior of particles inside the classifier. However, changes in operating conditions cannot improve it significantly. Particle size distribution and the average flow rate of the product stream of the experiment and the base simulation match well.

Design and modeling of a walking mechanism for the self-adapting pipeline robot

Self-adapting pipeline robot is widely used in many industrial fields and the walking mechanism is its critical part. According to the actual dimensional demand of a certain pipeline and the requirement of self-adapting pipeline robot, a walking mechanism is designed based on the double-cross structure and modelled through utilizing 3D modeling software. The walking mechanism can adjust its size to adapt to pipeline with different diameters. The workbench can be kept in the center of the pipeline by optimization of size of the double-cross structure. There are two driving wheels in the bottom and one driving wheel in the top to constitute three-point type, which can improve the stability and load capacity of the robot. The H-type driving wheel is adopted to improve stability and reliability of the contact between the wheel and the guide. Through optimizing parameters of the double-cross structure, the designed walking mechanism can meet the requirement of the pipeline with diameters from 480mm to 600mm. Furthermore, constructions of the walking mechanism are modelled by the Solidworks modeling software, which can verify the feasibility of the design. Design and modeling of the walking mechanism are propitious to give technical support to maintenance and repair of the pipeline.

Hydraulic pump based on the rolamite mechanism

When designing pumping equipment the question arises not only of the improvement of the existing types but also the search for a new principle of uniting the supporting elements with the elements of the formation of the working cameras of the pump. The purpose of the work is to provide a substantiation of the possibilities and expediency of designing a de-axial pump based on the Rolomite mechanism. Conditions ensuring the efficiency of the mechanism are considered on the basis of a specific hydraulic pump; the principle of inlet and outlet windows placement is justified. Analytical calculation of camera areas with the help of the created model in SolidWorks is provided and the coefficient of liquid compression is determined. The graphs of changing the areas of large and small cameras are presented. The use of an electromagnet as a drive makes it possible to transfer the rotation into a closed space, which makes it possible to abandon bearings, seals, and also significantly simplifies the technological process of pump elements manufacturing. The flexible tape allows reducing the slip friction and getting a separate camera, which makes it possible to pump two substances at a time. There is also a process of liquid magnetization in the pump, which reduces the corrosion of metal elements of the pump and the pipelines. Considering the benefits of these types of mechanisms, there is the prospect of their further research and implementation.

Numerical simulations of the pulsatile blood flow in the different types of arterial fenestrations: Comparable analysis of multiple vascular geometries

In medical terms, fenestration stands for an anomaly within the circulatory system in which the blood vessel lumen is divided into two separate channels that rejoin in the distal part of this vessel. The primary objective of this research was to analyze the impact of the left vertebral artery (LVA) and basilar artery (BA) fenestrations on the blood flow characteristics in their regions and downstream, in the cerebral circulation. The geometrical data, obtained from the angio-Computed Tomography, were the basis for the generation of a 3D model in SolidWorks 2015. In order to observe the flow characteristics within the whole spatial domain, computational fluid dynamics was involved in performing simulations of the blood flow in the patient-specific arterial system (beginning with the aortic arch and finishing with the Circle of Willis). To examine the flow distribution changes resulting from altered fenestration geometries, additional models were built. The blood flow velocity, volume flow rate and shear stress distribution were analyzed within this study. It was proven that the length/size/position of the fenestration altered the flow characteristics in different manners. The investigations showed that the patient-specific LVA, at the V3 section (extracranial part of the artery located between the spine and the skull), is not a reason of aneurysm formation. However, BA fenestration at the proximal segment might be a possible reason of future aneurysm formation. It was proven that the computational fluid dynamics tool could support medical diagnostic procedures and multivessel brain vascular disease treatment planning.

Experimental and numerical investigation of a triple-dish solar concentrator: a thermal and exergy study

The objective of this study is to investigate an innovative concentrating collector experimentally and numerically. This solar collector has three dish reflectors and a spiral-coil absorber. This configuration is innovative, combining a compact design which can be manufactured with low cost. The numerical analysis is performed with SolidWorks Flow Simulation. The developed model in SolidWorks is validated with the obtained experimental results and after this step, the solar collector is examined energetically and exergetically under various operating temperatures. According to the final results, the system can reach a thermal efficiency close to 32%, a relatively low value which is explained by the low reflectance of the experimental setup. The system exergetic efficiency reaches up to 8.3%, for inlet temperature close to 90oC. The detailed exergetic analysis proved the low exergy efficiency is explained by the high optical exergy loss and the high exergy destruction between sun and receiver.

Simulation Research of Manipulator Control System Based on Solidworks and Simmechanics

Using Solidworks and Simulink simulation platform, the virtual simulation system of manipulator is built, which improves the design efficiency of manipulator control system. Firstly, the 3D model of the manipulator is established in Solidworks, and the industrial six degree of freedom manipulator is taken as the research object, the Solidworks model is introduced into Simulink, and the joint simulation control system of the manipulator is built by the SimMechanics module in MATLAB/SIMULINK, and the model of the manipulator is added in the motion simulation platform. The kinematic and dynamic analysis of the manipulator is carried out by adding the terminal pose signal and the joint signal (angle function and torque value).

ANALYSIS OF AIR-SPRING FOR A LINK OF HYPER-REDUNDANT MANIPULATOR

Urgency of the research. This research paper deals with a designing and analyzing of link for hyper-redundant manipulator/mechanism. The paper investigates 6-DOF manipulator link, consisting of pneumatic as well as electromagnetic actuators. A motion of upper platform of the link is reached by pneumatic actuators, namely air-springs. The main focus of this research is analysis of air-spring and its properties. From this reason FEM analysis is done in software SolidWorks. In the conclusion the results are discussed. Pneumatic actuators can play interesting role in order to be possible to change the mechanical properties of the manipulators. Target setting. Analysis of air-spring actuator for hyper-redundant manipulator. Actual scientific researches and issues analysis. Most of robotic arms consist of electrical actuators. Using pneumatic actuators the manipulator gets new properties like changing stiffness. Uninvestigated parts of general matters defining. Air-springs are still in the process of investigation from the view of mechanisms actuator. The research objective. In the paper simulations and analysis of the air-spring are done. The statement of basic materials. This paper investigates the area of modeling in software SolidWorks. At first CAD model of new segment for hyperredundant manipulator is introduced and its basic parts are described. Then, in the preprocessing phase, the detailed steps of its setup SolidWorks computation core were described. The second half of the article is to focus on the calculation and assessment of simulation results. Conclusions. The paper introduces new kind of manipulator link. The link is analyzed and tested by simulation.

Structure Design and Experiment for Power Supply Device of Plant Factory Lighting System

The power generation device is developing rapidly, which focused on energy cleaning and inconvenient power supplying. This paper proposed a generation device which is mainly used to supply power for small power station such as plant factory lighting system. Firstly, fesibility analysis of piezoelectric power generation was made based on mathematic model. After that, installation mode of piezoelectric vibrator was determined. Secondly, shape of piezoelectric vibrator and suitable working thickness in the breeze were analyzed by ANSYS simulation. Finally, structural design was conducted by using SOLIDWORKS and 3D model of power supply device is established. Prototype making and test verification was carried out based on 3d model. The experimental results show that generation device has high stability and feasibility, which provide technical reference for optimization and improvement of piezoelectricity electric power facility.

Portable Multi-Inputs Renewable Energy System for Small Scale Remote Application

This paper presents a potable renewable energy system. The portable renewable energy power unit is designed from a need. The need is for first response teams in remote natural disaster situations to have a reliable source of energy to power a small vaccine refrigerator or water purification system and a basic satellite communication system. It is important that such a need is explored as a practical solution has the potential to save the lives of people in remote areas, who would otherwise suffer from a lack of humanitarian aid. Currently diesel generators are the primary source of electricity generation for disaster responders and in most situations work very well and provide a sufficient amount of electricity to meet the power needs. However, in remote areas road infrastructure is often damaged. In this type of situation getting a constant supply of diesel to the area is an expensive or impractical operation. This is where the portable renewable energy power unit bridges the gap and allows a more practical solution to be implemented. The specific aim of the work is to design a compact, stand-alone, product that can be easily transported by people across uneven terrain. It can generate power from wind, solar and hydro energy sources. In this work a new non-isolated multiport DC-DC converter topology for a hybrid energy system in low power applications is proposed. The new topology assimilates multiple renewable energy sources and power up multiple loads with different output levels. A complete Solid works model and FEA analysis, on required components, is completed. The scope of the work encompasses both the electrical and mechanical design of the system.

D2 Delta Robot Structural Design and Kinematics Analysis

In this paper, a new type of Delta robot with only two degrees of freedom is proposed on the basis of multi - degree - of - freedom delta robot. In order to meet our application requirements, we have carried out structural design and analysis of the robot. Through SolidWorks modeling, combined with 3D printing technology to determine the final robot structure. In order to achieve the precise control of the robot, the kinematics analysis of the robot was carried out. The SimMechanics toolbox of MATLAB is used to establish the mechanism model, and the kinematics mathematical model is used to simulate the robot motion control in Matlab environment. Finally, according to the design mechanism, the working space of the robot is drawn by the graphic method, which lays the foundation for the motion control of the subsequent robot.

Practical Aspects of Sustainability: A Discussion of product design with recyclable materials

Sustainable development is one that can meet the needs of the present generation without compromising the resources needed by future generations (1). The industry represents a great agent in the pursuit of sustainable development, yet only 30% of these companies seek opportunities to invest in sustainability (2). The search for sustainable development associated to the increase in technological power has stimulated the use of raw materials that add greater value to products and that meet environmental, social and economic specificities. In Brazil 352 thousand tons of flexible packaging were consumed in 2014, including long-life packaging (3), which can be used as technological alternatives, mainly for the use of paper, polyethylene and aluminum compounds. The objective of this work is to evaluate a sustainable product design from the discussion of the design of a stool produced with low density polyethylene and aluminum composite, resulting from the recycling process of the long life packaging (Tetra Pak). The project adopts two methodological approaches: the first theoretical, through an exploratory bibliographical research, that works the fundamentals and applications of sustainability, product design planning and production processes, with a sustainable material resources and recycling. The second path works the practice, through a study of the modeling in SolidWorks model of a stool for future prototyping.

AN ANALYSIS METHODOLOGY OF THE EFFECT OF USING DIFFERENT TRACKING TIME-STEPS ON THE NET ENERGY GAIN OF A CSP POWER PLANT

in central receiver solar power plant, heliostat tracking accuracy affects the optical efficiency and the amount of energy received at the target. In the present article, an integrated analysis of the effect of using different solar tracking time-steps on the energy consumption and gain of a central receiver system is developed. The drive system energy consumption is calculated by using a Solidworks model of the heliostat mechanical drive system. This Solidworks model is interfaced to a Labview model containing the model of the electrical drive and control systems. The solar energy collected at the receiver is calculated using Monte Carlo ray tracing software.

Elastic buckling of a thin-walled rectangular frame under in-plane compression

The paper is devoted to a thin-walled rectangular frame. The frame is simply supported in the planes of symmetry and in-plane compression forces are applied in the corners. The longitudinal and transverse thin-walled beams of the frame are rigidly joint at the corners. Two buckling forms of the frame are studied. The analytical and numerical-FEM (SolidWorks) models are formulated. The results of the studies are presented in Tables and Figures.

Numerical investigation of Linear Particle Chain impact dampers with friction

Impact dampers were first introduced in 1934 and the research and development on improving their performance and configuration is still ongoing to date. In this paper, the recently developed Linear Particle Chain (LPC) impact damper is experimentally and numerically studied. The damper was attached to a single-degree-of-freedom structure represented by a spring damper system and released from an initial position. A SOLIDWORKS model for the damper has been developed and numerically simulated using the finite element approach. The Coulomb friction model of the colliding masses is added to the overall structure. The response of the system was analyzed and compared to the experimental results. The simulation model showed a faster decay when the number of balls in the LPC impact damper was increased and when different mass ratios were used which is in agreement with the experimental results.

Modal Analysis of A small H-Darrieus Wind Turbine Based on 3D CAD, FEA

Rotary machines have many rotating structures necessity design-optimization. Their structure motions are controlled at low-frequency by rigidity, at high-frequency by inertia and at-resonance level by damping. Using modal model, dynamic design of the structure developed can be predicted, analyzed and improved. Recently, H-Darrieus wind turbine has (HDWT) received considerable attention due to its inherent structural characteristics. This machine intends a promising design of renewable energy conversion system in urban areas and isolates sites. Though, the system suffers of several dynamic problems caused by geometry, centrifugal and aerodynamic cyclic loadings. Present paper investigated dynamic design-optimization of a three-bladed (HDWT) based on its natural structural parameters using 3D CAD, FEA using SolidWorks modeling and simulation. From simulation result obtained, the first five natural frequencies of the system, corresponding mass participate, damping factor, and mode shapes are predicted and analyzed. The static and dynamic stability and reliability of the system are shown since security factor and all quality indicators tested, amplification factors, and resonant amplitude ratios are consistent according to the recommendations of structure dynamics standards. Furthermore, critical operating conditions of wind turbine under forcing excitations of the wind speeds at various regimes are also treated and assessed.

An Integrated Approach for Product Remanufacturing Assessment and Planning

The design information of a product can have significant impact on addressing the various issues in product remanufacturing, from upstream design for remanufacturing, to downstream remanufacturing processes, including disassembly, core refurbishment and remanufacturing process planning, etc. This paper presents a comprehensive framework for product remanufacturability assessment, remanufacturing process planning, and a systematic approach to design for disassembly for remanufacturing based on product design information available in CAD models, e.g., bill of materials, mating features, dimensions and tolerances, tools and accessories, etc. Through the consideration of both design for assembly and design for disassembly guidelines, the determination of the optimal disassembly route for cores to be retrieved and remanufactured is evaluated. Various issues associated with remanufacturing process decision-making are investigated, and a conceptual approach for planning product remanufacturing is developed, in which a sequence of suitable operations can be determined. A software tool is developed for the implementation of the proposed approach for product remanufacturing assessment, process planning, and disassembly route evaluation. A case study using a SolidWorks model of an automotive part is used to demonstrate and validate the proposed framework.

Modeling in SolidWorks and analysis of temperature and thermal stress during construction of intake tower

With a focus on the intake tower of the Yanshan Reservoir, this paper discusses the method of modeling in the 3D CAD software SolidWorks and the interface processing between SolidWorks and the ANSYS code, which decreases the difficulty in modeling complicated models in ANSYS. In view of the function of the birth-death element and secondary development with APDL (ANSYS parametric design language), a simulation analysis of the temperature field and thermal stress during the construction period of the intake tower was conveniently conducted. The results show that the temperature rise is about 29.934 °C over 3 or 4 days. The temperature differences between any two points are less than 24 °C. The thermal stress increases with the temperature difference and reaches its maximum of 1.68 MPa at the interface between two concrete layers.

Based on Rub a Drum of Four Axis Programming and Virtual Machining Optimization Research

Analysis of the features of Mastercam, Solidworks and Vericut software and their respective advantages, Proposed by Solidworks, MastercamX and VERICUT three software are combined as the optimization platform to build the NC machining program integrated modeling, assembly, processing, simulation and Optimization in one. Author take rub a drum processing for an example, in the Solidworks modeling, assembly, in the Mastercam X programming and generate the NC program, through VERICUT for the simulation and optimization of NC program, Examples show the rationality of optimization, avoiding the collision, the production and processing of the interference, the over cut phenomenon, Three software effectively combined, play a very high efficiency, improve the using efficiency of NC machine tool, has the certain reference significance to the actual production.