Electrically driven dielectric elastomers (DEs) suffer from an electromechanical instability (EMI) when the applied potential difference reaches a critical value. A majority of the past investigations address the mechanics of this operational instability by restricting the kinematics to homogeneous deformations. However, a DE membrane comprising both active and inactive electric regions undergoes inhomogeneous deformation, thus […]
The transfer matrix method for linear multibody systems is capable of providing precise solutions for the dynamics of various mechanical systems, but it may also suffer from numerical instability in some cases, where serial chains with a large number of mechanical elements are involved or high-frequency harmonic responses are computed. Combining such a transfer strategy […]
This paper presents an analytical method to investigate the effects of symmetric and asymmetric elastic supports on the nonlinear equilibria and buckling responses of shallow arches. It is found that arches with symmetric elastic supports can bifurcate into secondary paths with high-order symmetric modes. When a small asymmetry exists in the elastic supports, the equilibria […]
Wrinkling is a common phenomenon in natural and engineering film structures. The wrinkles influence the geometry and dynamic response of these structures. In this work, we investigate the wrinkling of a stretched thin film containing engineered microstructures and its derived functionality on controlling the propagation of bending waves. The underlying mechanism is revealed and the […]
A soft adhesive layer bonded between two rigid substrates, which are being pulled apart, may exhibit diverse instability phenomena before failure, such as cavitation, fingering, and fringe instability. In this study, by subdividing the soft layers into different numbers of disconnected smaller parts, we achieve desired instability modes and mechanical responses of the layer. The […]
Epidermal electronics mounted on the body provides the robust and noninvasive interfaces to monitor the electrophysiological signals of human body. The contact characteristic of the epidermal electronics with the skin affects the accuracy of the measured signals. In this paper, ionic polymer–metal composite is used to regulate the interface force for the consistency of the […]
This paper presents an innovative approach of stress attenuation through a continuous impedance-graded material system for high strain-rate events. High energetic dynamic events such as blasts and impact could cause stress waves—in the form of elastic, plastic, and shock—to propagate in a solid material. An impedance-graded composite is created by arranging different metallic alloys in […]
A crossbow is one of the shape defects caused by width differences between the top and bottom plate surfaces. To improve the plate flatness, leveling must be performed to flatten the crossbowed plate prior to the second manufacturing process. Leveling is a process for minimizing shape defects and enhancing the internal stress uniformity in shape-critical […]
Conventional machining of Ti6Al4V/TiC composites is a very difficult process, which exhibits a peculiar cutting force pattern where the thrust forces are higher than the tangential forces. This behavior results in rapid tool wear and consequently very short tool life. This study is concerned with describing the reasons for the attendant behavior using experimentally validated […]
Although extrusion-based 3D printing processes have seen many successful applications at the macroscale, it has proven to be challenging for consistent, repeatable, and cost-effective printing at the microscale due to its dynamic complexities. To fully tap into the promise of microextrusion printing (µEP) of fabricating fine resolution features, it is critical to establish an understanding […]
This work presents a finite element analysis-based, topology optimization (TO) methodology for the combined magnetostatic and structural design of electrical machine cores. Our methodology uses the Bi-directional Evolutionary Structural Optimization (BESO) heuristics to remove inefficient elements from a meshed model based on elemental energies. The algorithm improves the average torque density while maintaining structural integrity. […]
Determining a suitable level of description, or granularity, for a product or process model is not straightforward, especially since granularity can manifest in multiple ways, but it is important to capture important elements in the model without building models that are too large to understand. This article investigates the implications of model granularity choices by […]
Topology optimization of macroperiodic structures is traditionally realized by imposing periodic constraints on the global structure, which needs to solve a fully linear system. Therefore, it usually requires a huge computational cost and massive storage requirements with the mesh refinement. This paper presents an efficient topology optimization method for periodic structures with substructuring such that […]
Periodic cellular structures with excellent mechanical properties widely exist in nature. A generative design and optimization method for triply periodic level surface (TPLS)-based functionally graded cellular structures is developed in this work. In the proposed method, by controlling the density distribution, the designed TPLS-based cellular structures can achieve better structural or thermal performances without increasing […]
For 42 years, the Mechanisms and Robotics (M&R) Conference has provided an international venue for presentation and discussion of the latest scientific and technical results in the broad field of mechanical systems and their applications. This includes the design (novel mechanisms and robots, synthesis), analysis (kinematics, dynamics, computational approaches, and software systems), applications (from micro-air vehicles, […]
The parameterization of rotations is a central topic in many theoretical and applied fields such as rigid body mechanics, multibody dynamics, robotics, spacecraft attitude dynamics, navigation, three-dimensional image processing, and computer graphics. Nowadays, the main alternative to the use of rotation matrices, to represent rotations in ℝ3, is the use of Euler parameters arranged in […]
Spherical robots have a wide range of self-propulsion mechanisms. Of particular interest in this paper are propulsion systems where wheels are placed in contact with the inner surface of the spherical shell of the robot. Here, locomotion is achieved by a combination of the actions of the motors along with the rolling constraints at the […]
A novel parallel kinematics machine (PKM) stemming from the 3-SRU (spherical-revolute-universal) under-actuated joints topology is presented in this paper. The concept here proposed takes advantage of a reconfigurable universal joint obtained by locking, one at a time, different rotations of a spherical pair. Such local reconfiguration causes a slight, yet crucial, modification of the robot […]
In this paper, the design of compliant three-dimensional (3D) printed surgical end-effectors for robotic lumbar discectomy is presented. Discectomy is the surgery to remove the herniated disk material that is pressing on a nerve root or spinal cord. This surgery is performed to relieve pain or numbness caused by the pressure on the nerve. The […]
Soft linear actuators (SLAs) make linear displacement by shrinkage and relaxation like skeletal muscles, so they can be called as artificial skeletal muscles (ASMs). They deform their body to create displacement. However, the restoring force generated by the deformation of their soft body reduces the force available from the SLA. This actuation structure is a […]
This paper shows an experimental validation for the design of a three-degree-of-freedom (DOF) cable-suspended parallel robot, which has six cables attached to the end-effector, arranged in three pairs, with each pair being driven by a single motor. For each pair, the moving platform attachment points and the winch cable guides on the fixed frame form […]
This paper presents methods to exploit the redundancy of a kinematically redundant spatial parallel mechanism with three redundant DOFs. The architecture of the mechanism is similar to the well-known Gough–Stewart (GS) platform and it retains its advantages, i.e., the members connecting the base to the moving platform are only subjected to tensile/compressive loads. The kinematic […]
This paper presents the design of a two-degrees-of-freedom (DoFs) variable stiffness mechanism and demonstrates how its adjustable compliance can enhance the robustness of physical human–robot interaction. Compliance on the grasp handle is achieved by suspending it in between magnets in preloaded repelling configuration to act as nonlinear springs. By adjusting the air gaps between the […]
This paper describes the use of an active disturbance rejection controller (ADRC) to estimate and compensate for the effect of slip in an online manner to improve the path tracking performance of autonomous ground vehicles (AGVs). AGVs with skid-steer locomotion mode are extensively used for robotic applications in the fields of agriculture, transportation, construction, warehouse […]
Hello to all, Welcome to the new edition of the SOLIDWORKS Support Monthly News! This monthly news blog is co-authored by members of the SOLIDWORKS Technical Support teams worldwide. SOLIDWORKS Inspection Integration with SOLIDWORKS PDM By Nicole Phillips With Author information Nicole Phillips Technical Customer Support Engineer, SOLIDWORKS, Americas at DS SolidWorks Corp. I […]
Find fast tips and tricks to up your electrical game through our baseball Spring Training theme! Welcome to GSC’s SOLIDWORKS Electrical Spring Training How is SOLIDWORKS Electrical like everyone’s favorite game (ahem, Baseball), and a nation getting through Spring Training, Author information GSC GSC fuels customer success with 3D engineering solutions for design, simulation, data […]
3D Scanning is an emerging technology but is it worth getting onto? Author information SOLIDWORKS Dassault Systèmes SolidWorks Corp. offers complete 3D software tools that let you create, simulate, publish, and manage your data. SolidWorks products are easy to learn and use, and work together to help you design products better, faster, and more cost-effectively. […]
Replicating the archives of our PDM database is not a new feature for most of us. Many companies have implemented this in their network infrastructure. You can find plenty of information in the administration guides, and using standard online searching Author information TPM TPM, Inc. is the Carolina’s largest 3D CAD provider and a leading […]
Within 3D printing getting the first few layers correct is very important as it has a knock on effect with the success of your print. In this article, we are going to discuss some of the techniques to improve your Author information NT CADCAM NT CADCAM is the UK's most established SOLIDWORKS reseller in England, […]
Well as many of you probably know, Captain Marvel hit theaters last month and it has been a gigantic hit. One of the people who joined the masses in the theater was our very own Marvel expert Mike Dady. After Author information Alignex, Inc. Alignex, Inc. is the premier provider of SOLIDWORKS software and partner […]
Interactive Images are a great export option within Visualize Professional, allowing you to view the model in a series of 360 orbital spins within a web browser. However, what happens if I want to use this interactive method to demonstrate Author information Solid Solutions Technical Team Solid Solutions commenced business as a SolidWorks Training and […]
One of the biggest announcements at SOLIDWORKS WORLD this year was the inclusion of SOCIAL COLLABORATION SERVICES (or SCS) at no cost with every seat of SOLIDWORKS on subscription. SCS enables a variety of tools which allow design teams to Author information Toby Schnaars The post Using SOLIDWORKS and Social Collaboration Services to Manage Your […]
Hello to all, Welcome to the new edition of the SOLIDWORKS Support Monthly News! This monthly news blog is co-authored by members of the SOLIDWORKS Technical Support teams worldwide. The justification for the Yield and Tensile Strength values for Author information Nicole Phillips Technical Customer Support Engineer, SOLIDWORKS, Americas at DS SolidWorks Corp. I […]
Hey SOLIDWORKS Community! Welcome to the final part of our 3-part series where we’re working through setting up configurations and configuration publisher to make assembling different versions of this geared pendant a breeze. Up to this point we’ve created a Author information SOLIDWORKS Dassault Systèmes SolidWorks Corp. offers complete 3D software tools that let you […]
The developer of the Auckland City Rail Link in New Zealand has announced a Vinci-led team as the preferred bidder for the main package and has said that the overall project cost has risen by NZ$1bn (£515m).
Pferd has introduced a new series of 100 percent stainless steel power brushes designated INOX-Total. All components are produced from 302 stainless (INOX) for corrosion protection, so they are suitable for use in environments highly sensitive to contamination. The brushes are available for...
Jacksonville, Fla.-based UltraTech's Tactical Welder won the top prize in the Portable Productivity Solutions category in the 2019 Edison Awards. The Edison Awards, named after Thomas Alva Edison, recognize and honor innovators and innovations. The Tactical Welder, which won a Gold Edison Award, is...
Southworth Products Corp., Portland, Maine, has launched a new program to maximize the availability of lift tables and vertical lifting and positioning equipment for fast delivery. The SwiftLift™ program puts LS series hydraulic lift tables and other products like PalletPal® pallet positioners...
St. Louis-based nonferrous metals provider Metal Exchange Corp. has announced a new joint venture with Novellini Industries, located in Mantova, Italy. The newly formed company, called novALmec, supplies aluminum billet to the European market. The newly formed venture is expanding Novellini’s...
ATI Industrial Automation, a developer of robotic accessories and robot arm tooling, will host an Automation Expo May 9, 2019, at its recently expanded and renovated headquarters in Apex, N.C. They keynote speakers and presentation topics have been announced at www.ati-ia.com/atiexpo. An exhibition...
SAS has introduced the model 300 RuggedAir mobile fume extractor. It removes airborne fumes and particulates produced by welding, metalworking, powder handling, and solvents and chemicals. The system features a cleanable Micro-Pleat Series 2 particulate filter that can be cleaned with compressed...
Specialty StripandOscillating Inc., Masury, Ohio, celebrates its 25th anniversary this year. Tom M. von Philp founded the company in 1994 after working in executive and management positions at Bethlehem Steel, Empire Detroit Steel, and Sharon Steel. The family-owned business now is operated by...
FlexCNC has introduced G-series vertical machining centers for face milling, helical milling, rough milling, and drilling of large or long parts in a single setup. The model 20-06 SE has a 20- by 6-ft. bed to machine parts up to 20 ft. long. Multiple setups are possible to allow machining a part...
Dallas-based Arcosa Inc. has announced plans to invest $7.5 million to reopen the idle barge manufacturing operations in Madisonville, La., creating 149 jobs. Arcosa Marine Products Inc., a division of Arcosa Inc., will install new equipment and complete facility upgrades to begin producing barges...