The introduction of a dislocation from the free-surface of a grain A of a polycrystal has been investigated from the theoretical point of view. Assuming two disclination dipoles are lying in a high angle boundary separating the corresponding grain A and a neighbor grain B, the equilibrium position of the dislocation has been determined in […]
In the present work, it is intended to discuss how to achieve real-time structural topology optimization (i.e., obtaining the optimized distribution of a certain amount of material in a prescribed design domain almost instantaneously once the objective/constraint functions and external stimuli/boundary conditions are specified), an ultimate dream pursued by engineers in various disciplines, using machine […]
Energy absorption structures are widely used in many scenarios. Thin-walled members have been heavily employed to absorb impact energy. This paper presents a novel, Ron Resch origami pattern inspired energy absorption structure. Experimental characterization and numerical simulations were conducted to study the energy absorption of this structure. The results show a new collapse mode in […]
Specific adhesion of soft elastic half spaces via molecular bond clusters has been extensively studied in the past ten years. In this study, the adhesion of a soft elastic solid with finite size is considered aiming to investigate how their size and shape may affect the adhesion strength. To model this problem, plane strain assumption […]
The plastic properties that characterize the uniaxial stress–strain response of a plastically isotropic material are not uniquely related to the indentation force versus indentation depth response. We consider results for three sets of plastic material properties that give rise to essentially identical curves of indentation force versus indentation depth in conical indentation. The corresponding surface […]
A major contributor to rolling resistance is road roughness-induced energy dissipation in vehicle suspension systems. We identify the parameters driving this dissipation via a combination of dimensional analysis and asymptotic analysis. We begin with a mechanistic model and basic random vibration theory to relate the statistics of road roughness profile and the dynamic properties of […]
High-definition metrology (HDM) has gained significant attention for surface quality inspection since it can reveal spatial surface variations in detail. Due to its cost and durability, such HDM measurements are occasionally implemented. The limitation creates a new research opportunity to improve surface variation characterization by fusing the insights gained from limited HDM data with widely […]
In this paper, we present a new approach of combining point-by-point selective powder delivery with powder bed fusion for multiple material (metal/glass) components printing. Dual ultrasonic vibration was used to achieve stable flowrates of both 316 L steel and soda-lime glass powders which were dispensed selectively and separately. The effects of the stand-off distance and the […]
Understanding the capture efficiency of powder during direct laser deposition (DLD) is critical when determining the overall manufacturing costs of additive manufacturing (AM) for comparison to traditional manufacturing methods. By developing a tool to predict the capture efficiency of a particular deposition process, parameter optimization can be achieved without the need to perform a costly […]
This paper presents the design methodology for a single-mobility, large surface-deployable mechanism using irregularly shaped triangular prismoid units. First, we demonstrate that the spherical shell, as the deployed profile of the large deployable mechanism, cannot be filled with identical regular-shaped triangular prismoids (truncated pyramid) without gaps, which makes the design challenging because a large set […]
In this paper, general combined plant and control design or co-design problems are examined. The previous work in co-design theory imposed restrictions on the type of problems that could be posed. This paper lifts many of those restrictions. The problem formulations and optimality conditions for both the simultaneous and nested solution strategies are given. Due […]
This paper presents a simple and effective heuristic for topology optimization of a truss under the constraint that all the members of the truss have the common cross-sectional area. The proposed method consists of multiple restarts of the alternating direction method of multipliers (ADMM) with random initial points. It is shown that each iteration of […]
Topologies of large deformation contact-aided compliant mechanisms (CCMs), with self and mutual contact, exemplified via path generation applications, are designed using the continuum synthesis approach. Design domain is parameterized using honeycomb tessellation. Assignment of material to each cell, and generation of rigid contact surfaces, are accomplished via suitably sizing and positioning negative circular masks using […]
This paper describes a unique design concept that is capable of electronically controlling the flow delivered by an external gear pump (EGP). The principle used for varying the flow relies on the variable timing concept which has been previously demonstrated by the author's research team for EGP's operating at high pressures (HPs) (p > 100 bar). This […]
A constant torque compliant mechanism (CM) generates an output torque that keeps invariant in a large range of input rotation. Because of the constant torque feature and the merits of CMs, they are used in automobile, aerospace, medical, healthcare, timing, gardening, and other devices. A common problem in the current constant torque CMs is their […]
Discrete-time state-space models have been extensively used in simulation-based design of dynamical systems. These prediction models may not accurately represent the true physics of a dynamical system due to potentially flawed understanding of the system, missing physics, and/or numerical approximations. To improve the validity of these models at new design locations, this paper proposes a […]
The user experience of a product is recognized as having an increasing importance in particular in consumer products. Current approaches to designing user experiences are not easily translated to languages that a computer can understand. This paper examines a particular aspect of user experience, namely perception of the aesthetics of a product, to formalize this […]
The purpose of product dissection is to teach students how a product works and provide them with inspiration for new ideas. However, little is known about how variations in dissection activities impact creative outcomes or engineering self-efficacy (ESE) and creative self-efficacies (CSE). This is important since the goal of engineering education is to produce capable […]
Benefiting from small incisions, reduced risk of infection, less pain, and fast recovery, minimally invasive surgery has shown tremendous advantages for patients. In these kinds of procedures, remote center-of-motion (RCM) mechanisms play an important role in performing operations through small incisions. Inspired by the Peaucellier–Lipkin straight-line cell, this paper presents the design and verification of […]
Insects are one of the most diverse group of animals on the planet and are almost ubiquitous. Their walking locomotion has inspired engineers and provided effective solutions for designing transport methods for legged robots. In this paper, we introduce a hexapod walking robot that mimics the design and walking motions of insects. The robot is […]
Elastic storage has been reported to help flying insects save inertial power when flapping their wings. This motivates recent research and development of elastic storage for flapping-wing micro air vehicles (fwMAVs) and their ground (tethered) flight tests. The previous designs of spring-loaded transmissions are relatively heavy or bulky; they have not yet been adopted by […]
This paper presents a novel assembly sequence planning (ASP) procedure utilizing a subassembly based search algorithm (SABLS) for micro-assembly applications involving geometric and other assembly constraints. The breakout local search (BLS) algorithm is adapted to provide sequencing solutions in assemblies with no coherent solutions by converting the final assembly into subassemblies which can be assembled […]
When designing and optimizing spatial flexure mechanisms, it is hard to predict collision due to 3D motion and large deformations, which compromises the utilization of spatial freedom. A computationally efficient collision test is desirable to assure that feasible mechanism designs are found when algorithmically optimizing the shape of elastic mechanisms, which are prone to collision. […]
In this paper, a new hybrid parallel robot (HPR) manipulator is introduced. First three kinematic limbs of six-legged general Stewart platform (6DOF GSP) manipulator are disconnected. Afterward, each passive universal joint of remaining three-legged parallel manipulator (three-UPS) is mounted at the center of each second passive revolute joint of RPR planar parallel manipulator (3DOF PPM) […]
This paper presents a cooperative robot exploration (CRE) strategy that is based on the sensor-based random tree (SRT) star method. The CRE strategy is utilized for a team of mobile robots equipped with range finding sensors. Existing backtracking techniques for frontier-based (FB) exploration involve moving back thorough the previous position where the robot has passed […]
A mechanism consisting of twisting and tilting joints is introduced to provide omnidirectional thrust-vectoring capabilities to a quadrotor system. This mechanism eliminates mechanical constraints and kinematic singularities to provide full directional authority to all four individual thrust vectors. The presented system fully decouples position and attitude dynamics to overcome the intrinsic maneuverability limitations of traditional […]
A general accuracy analysis method of redundantly actuated and overconstrained parallel mechanisms is proposed. Coupled effects of actuation errors and internal elastic forces arose from the elastic deformation are both considered. The accuracy analysis approach is based on the Lie-group theory and screw theory, and it includes three steps. First, stiffness matrices of serial legs […]
Jacobian matrix plays a key role in the analysis, design, and control of robots. For example, it can be used for the performance analysis and evaluation of parallel mechanisms (PMs). However, the Jacobian matrix of a PM generally varies with the poses of the moving platform in the workspace. This leads to a nonconstant performance […]
In this paper, we present the redesign and analysis of a century old walking toy. Historically, the toy is made up of two wooden pieces including a rear leg and a front leg and body (as a single piece) that are attached to each other by means of a pin joint. When the toy is […]
Hello to all, Welcome to this new edition of the SOLIDWORKS Support Monthly News, co-authored by members of the SOLIDWORKS Technical Support teams worldwide. Key Areas to Consider When Designing a Disaster Recovery Plan for a Business IT Infrastructure By Author information Bradley Phillips Sr. Technical Customer Support Engineer, SolidWorks, NAM at DS SolidWorks Corp. […]
Introduction SolidSolutions has recently welcomed another 11 Technical Interns to the team, they are currently being put through a 12 week induction and as part of this they’ll be blogging about what they’ve learned. Having recently sat on the SOLIDWORKS Author information NT CADCAM NT CADCAM is the UK's most established SolidWorks reseller in England, […]
1. Uncovering a childhood memory at the thrift store! I love thrift stores. There’s something magical about walking into one of these places and uncovering a treasure or seeing something from your childhood resurface. The latter is what happened to Author information DesignPoint DesignPoint is passionate about building solutions that help product design, engineering and […]
SOLIDWORKS Resource Running Low Some SOLIDWORKS users tend to encounter this issue. Factor such as limited RAM space and many running programs at one time can be considered as the major caused. For resolution, you may refer the to 2 Author information ateworks From our humble beginnings in 2008, ATE has grown from a single-office […]
One of the major enhancements in Visualize 2019 is the enhanced support for materials, available in both Visualize Standard & Professional. If we break down the enhanced material support further, we can talk about 3 different types of materials or Author information Michel Cloutier Senior Territory Technical Manager at DS SOLIDWORKS Mechanical designer by trade […]
SOLIDWORKS is a user friendly and easy to learn 3D CAD modeling solution. SOLIDWORKS user interface is design to match the native Window Operating System interface providing you a familiar interface to start your daily 3D modeling. If you are Author information ateworks From our humble beginnings in 2008, ATE has grown from a single-office […]
Continuing in our exploration of recent (and not-so-recent) enhancements to SOLIDWORKS, we’ll turn our attention to sketching. Check out the video and see how many new things you can catch! This blog is authored by Jeff Setzer, GSC’s resident SOLIDWORKS Author information GSC GSC fuels customer success with 3D engineering solutions for design, simulation, data […]
Laser cutters on the market can automaticity recognize colour layers from DXF files. Based on the colour in the DXF file the machine makes an engraving or cuts the geometry. With a conventional DXF export you would need edit the Author information CAD2M CAD2M is certified reseller of SOLIDWORKS, SolidCAM, DriveWorks and our private label […]
For the upcoming cyclocross (a cycling discipline) race season, I wanted a new bike. I found a great deal on one, but needed to modify it for my “needs.” In particular, I needed a new set of dropouts. What is Author information TPM TPM, Inc. is the Carolina’s largest 3D CAD provider and a leading […]
September Tech Blog Post - Importing AutoCAD Electrical symbols into Solidworks Electrical Author information Thomas Smith Thomas Smith, a Senior Consultant, serves diverse industries across the nation and specializes in Controls and Electrical Design for Spark. While his daily focus revolves around Solidworks software, application training and individual consulting for the manufacturing industry; his niche […]
Marengo, Ill.-based material handling equipment manufacturer UniCarriers Americas Corp. (UCA) has concluded its first Forklift Industry Summit. Held in Miami, Fla., the invitation-only event brought together more than 375 industry leaders to learn about the latest in material handling. Component...
Souderton, Pa.-based Solar Atmospheres, a provider of vacuum heat-treating, vacuum brazing, and vacuum carburizing services, has announced that its CEO, Roger A. Jones, has been awarded the honor of ASM Fellow (FASM). According to ASM, “The honor of Fellow represents recognition of distinguished...
EHE Consumables, a subsidiary of Norway-based EFD Induction Group, has been awarded ISO 9001 certification.The company is manufacturer of impeders and induction coils supplying the tube and pipe industry.
Clearwater, Fla.-based Sun Glo Plating Co. has announced that the company now is offering passivation to improve the corrosion resistance of stainless steel alloys. “Passivation is accomplished by immersing stainless steel in a nitric or citric acid bath,” said Dave Brackenhamer, director of...
A repaired part is only as good as its functionality post-repair. After repairing a broken tractor arm in his shop, Josh Welton learned that more work was required to reconnect the arm and have it function as needed. Accomplishing this called for yet more ingenuity in less than optimal conditions.
TRUMPF’s series 3000 press brake offers a closed-frame design that provides high overall rigidity and, therefore, higher precision than the previous generation, the company states. The backgauges can move across the entire length of the machine bed, enabling unrestricted use when bending at the...
FABTECH attendees will be propelled forward in the momentum of the circulating crowds, whirring machinery demonstrations, dynamic presentations, and peer-to-peer networking at the 19th largest tradeshow in the U.S. the Georgia World Congress Center (GWCC).