Engineering students occasionally wonder: why not 12mc2? While most have no need for Einstein’s special theory of relativity, this theory nevertheless offers them a shining example of the power of mathematical deduction and beautiful simplicity. At its 100th anniversary in 2005, I gave my students a one-page pencil note explaining this glorious gem of a […]
In the past decades, various novel functions (i.e., negative Poisson's ratio, zero thermal expansion) have been obtained by tailoring the microstructures of the cellular structures. Among all the microstructures, the horseshoe topology shows a J-shaped stress–strain curve, which is quite different from the conventional materials. It can be inferred that the 2D lattice structure with […]
This paper presents a new energy dissipation system composed of multistable cosine-curved domes (CCD) connected in series. The system exhibits multiple consecutive snap-through and snap-back buckling behavior with a hysteretic response. The response of the CCDs is within the elastic regime and hence the system's original configuration is fully recoverable. Numerical studies and experimental tests […]
The interlayer attraction force between concentric carbon nanotubes (CNTs) plays an important role in CNT-based nanodevices. However, the precise measurement of the interlayer attraction force remains to date a challenge. Although theoretical investigations have identified the dependence of the interlayer attraction force on the tube radius, no explicit relation for such dependence has been established […]
Protecting concrete structures from high energetic dynamic events such as blasts and impact is a major concern, in both civil- and military-related applications. Most conventional techniques fail to counter the unpredictable nature of dynamic loads, as well as the complex response of structures due to stress wave propagation. Hence, this paper explores the possibility of […]
This paper presents an analysis of void growth and coalescence in isotropic, elastoplastic materials exhibiting sigmoidal hardening using unit cell calculations and micromechanics-based damage modeling. Axisymmetric finite element unit cell calculations are carried out under tensile loading with constant nominal stress triaxiality conditions. These calculations reveal the characteristic role of material hardening in the evolution […]
The mask image projection-based stereolithography (MIP-SL) is a low-cost and high-resolution additive manufacturing (AM) process. However, the slow speed of part separation and resin refilling is the primary bottleneck that limits the fabrication speed of the MIP-SL process. In addition, the stair-stepping effect due to the layer-based fabrication process limits the surface quality of built […]
In this research, we propose a coupled thermomechanical modeling method for predicting grinding residual stress based on randomly distributed grains. In order to deal with the problem that the nominal grinding force is too small to generate the plastic deformation, we hold the opinion that grinding residual stress is totally derived from three factors: thermal […]
Bulk metallic glasses (BMGs) are a series of metal alloys with an amorphous structure. The deformation of BMGs occurs in localized regions and is highly sensitive to the applied stress, strain rate, and temperature. This paper presents a coupled thermomechanical model to analyze the chip segmentation mechanism due to material shear localization in orthogonal cutting […]
The presence of various uncertainty sources in metal-based additive manufacturing (AM) process prevents producing AM products with consistently high quality. Using electron beam melting (EBM) of Ti-6Al-4V as an example, this paper presents a data-driven framework for process parameters optimization using physics-informed computer simulation models. The goal is to identify a robust manufacturing condition that […]
Tailored blanks characterized by variable thickness were friction stir welded (FSWed) with the aim to obtain constant joint properties along the weld seam, regardless of the thickness change. To pursue this goal, the heat input was kept constant by in-process control of tool rotation. A dedicated numerical model of the process was used to determine […]
Sensor signals acquired during the manufacturing process contain rich information that can be used to facilitate effective monitoring of operational quality, early detection of system anomalies, and quick diagnosis of fault root causes. This paper develops a method for effective monitoring and diagnosis of multisensor heterogeneous profile data based on multilinear discriminant analysis. The proposed […]
A novel two degree-of-freedom (2-DOF) parallel mechanism with remote center-of-motion (RCM) is proposed for minimally invasive surgical applications in this paper. A surgical manipulator with expected three-rotation and one-translation (3R1T) outputs can be obtained by serially connecting a revolute pair (R) and a prismatic pair (P) to the mechanism. First, kinematics of the new mechanism […]
Most passive gravity balancing mechanisms (GBMs) require manual adjustment or actuators to alter its parameters for different payloads. The few balancers that passively self-regulate employ regulation at the end-effector, which makes the end-effector bulky. Additionally, there is a lack of systematic approach to design such compensators. Hence, this paper provides a review of current work […]
The cooling system of plastic injection mold plays a critical role during the injection molding process. It not only affects part quality but also its cycle time. Traditionally, due to the limitations of conventional drilling methods, the cooling system of the injection mold usually consists of simple paralleled straight channels. It seriously limits the mobility […]
Soft locomotion robots are intrinsically compliant and have a large number of degrees of freedom. They lack rigid components that provide them with higher flexibility, and they have no joints that need protection from liquids or dirt. However, the hand-design of soft robots is often a lengthy trail-and-error process. This work presents the computational design […]
This paper presents a set of motion transmission error data for a family of helical gears having different profile and lead modifications operated under both low-speed (quasi-static) and dynamic conditions. A power circulatory test machine is used along with encoder and accelerometer-based transmission error measurement systems to quantify motion transmission behavior within wide ranges of […]
Quantitative approaches for estimating user demand provide a powerful tool for engineering designers. We hypothesized that estimating binomial distribution parameters n (user population size) and p (user population product affinity) from historical user data can predict demand in new situations for distributed product service systems. Distributed product service systems allow individuals to use shared products […]
Ocean wave power is a promising renewable energy source. It has, however, been difficult to find a cost-effective solution to convert wave energy into electricity. The harsh marine environment and the fact that wave power is delivered with large forces at low speed make design of durable mechanical structures and efficient energy conversion challenging. The […]
Here we describe a problem class with combined architecture, plant, and control design for dynamic engineering systems. The design problem class is characterized by architectures comprised of linear physical elements and nested co-design optimization problems employing linear-quadratic dynamic optimization. The select problem class leverages a number of existing theory and tools and is particularly effective […]
When teaching sustainable design in industry or academia, we should teach design methods, activities, and mindsets that are most effective at driving real change in a industry. However, most studies of design practices are performed on students, not on professionals. How strongly do student perceptions of value predict those of industry teams designing real products? […]
Automating the double-hull block welding improves the shipbuilding efficiency and mitigates health risk to the welders. Due to the unique challenge posed by the internal structures, existing technologies are at most semi-autonomous. Believing that mobility is key to full autonomy, we employ mobile robot technology to transport the welding manipulator, treating the internal structures as […]
This paper presents the novel design and integration of a mobile robot with multi-directional mobility capabilities enabled via a hybrid combination of tracks and wheels. Tracked and wheeled locomotion modes are independent from one another, and are cascaded along two orthogonal axes to provide multi-directional mobility. An actuated mechanism toggles between these two modes for […]
This article presents a new variable actuation mechanism based on the 3-RPR parallel robot. This mechanism is an evolution of the NaVARo robot, a 3-RRR parallel robot, for which the second revolute joint of the three legs is replaced by a scissor to obtain a larger working space and avoid the use of parallelograms to […]
The narrow and redundant body of the snake robot makes it suitable for the inspection of complex bar structures, such as truss or tree structures. One of the key issues affecting the efficient motion of snake robots in complex bar structures is the development of mechanical models of snake robots on cylinders. In other words, […]
This paper applies geometric design principles to planar mechanical systems, attempting to explain complex motion in mechanism–object/environment interaction for realizing multiple kinematic tasks in the vicinity of a contact location. The latter is a critical feature not fully captured in existing design methodologies. This is achieved through the development of a general planar geometric model […]
When designing linkage mechanisms for motion synthesis, many examples have shown that the optimal kinematic constraint on the task motion contains too large deviation to be approximately viewed as a single rotational or translational pair. In this paper, we seek to adopt our previously established motion synthesis framework for the design of cam-linkages for a […]
To solve the difficult parking problem, developing a mechanical parking device is a practical approach. Aiming at longitudinal parking, a novel compact double-stack parking system is put forward based on a 1-DOF (degree of freedom) cam-linkage double-parallelogram mechanism. Due to the unique structure, the whole device can be driven by a single motor to realize […]
Driving system parameter optimization (DSPO) is an important approach to improve robots' dynamic performances such as acceleration capacity, load carrying capacity, and operation stability. To achieve better dynamic performance, motors with high power and high cost are generally used. But this leads to a waste of resources. It is difficult to simultaneously make the robots […]
This paper studies a novel fluid actuated system for a spherical mobile robot. The robot’s mechanism consists of two essential parts: circular pipes to lead spherical moving masses (cores) and an internal driving unit to propel the cores. The spherical shell of the robot is rolled by displacing the cores in the pipes filled with […]
Recent advancements in powered lower limb prostheses have appeased several difficulties faced by lower limb amputees by using a series-elastic actuator (SEA) to provide powered sagittal plane flexion. Unfortunately, these devices are currently unable to provide both powered sagittal plane flexion and two degrees of freedom (2-DOF) at the ankle, removing the ankle’s capacity to […]
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. What’s New in SOLIDWORKS Flow Simulation 2019 SP1.0 and 2.0 Author information Nicole Phillips Technical Customer Support Engineer, SOLIDWORKS, Americas at DS SolidWorks Corp. I […]
The SOLIDWORKS Help menu is a great resource for discovering how to use different pieces of SOLIDWORKS. The Help menu can be found inside of SOLIDWORKS by going to Help > SOLIDWORKS Help. This will bring up the online help Author information Alignex, Inc. Alignex, Inc. is the premier provider of SOLIDWORKS software and partner […]
If you’ve ever run into the case where you get the following message, seen below in Image 1: “At least two bodies are interfering. Do you want to check interference?” Image 1: Detected bodies that are interfering. Agghhh! And I’m Author information Joe Galliera Senior Simulation Technical Manager , East area at DS SOLIDWORKS Joe […]
Everyone knows that SOLIDWORKS is the most feature-heavy CAD software out there. Whatever you may dream of doing with a 3D model, there’s probably a SOLIDWORKS command button that can do it for you. The problem is, our computer screens Author information DesignPoint DesignPoint is passionate about building solutions that help product design, engineering and […]
The fourth video in our exploring XR series explores the new virtual reality capabilities of eDrawings Professional. We’ll show you how to get started using direct VR and give you an idea of the benefits eDrawings Professional can bring to Author information Cadtek Systems UK - Elite SOLIDWORKS Training & Support Cadtek has been established […]
Cadtek Systems UK - Elite SOLIDWORKS Training & Support
1.NEW CHAMFER AND FILLET CREATION OPTIONS • Create or modify partial chamfers and fillets along a portion of an edge • Instant changes of chamfer and fillet creation with handy graphical controls Users can now either simply drag or enter Author information EGS India Managing Director at EGS Computers India Private Limited E G S […]
Do you know how to use the Selection Manager? This tech tip uses two examples, the first makes two lofts where two different sketches included closed shapes needed. Using the section manager we are able to pick out the closed Author information SOLIDWORKS Dassault Systèmes SolidWorks Corp. offers complete 3D software tools that let you […]
There is nothing more frustrating for us at Alignex then hearing our customers are struggling with a project. It’s even worse when we find out the problem is easily fixable with a feature already hidden within the SOLIDWORKS interface. This Author information Alignex, Inc. Alignex, Inc. is the premier provider of SOLIDWORKS software and partner […]
With the final episode of Game of Thrones airing this week we’ve had the Iron Throne on our minds a lot lately. So much so that we decided to print our own Iron Throne phone stand! Read on to see Author information Solid Solutions Technical Team Solid Solutions commenced business as a SolidWorks Training and […]
Celebrating the new Game of Thrones season with a Fire vs Ice Chess set. Author information Kirby Downey Lead Designer at MyMiniFactory I am a product designer from South Africa, currently based in London. I specialize in taking objects and adding a technical and mechanical side to it, first making it work mechanically before adding […]
In 1986 Dave Strand was hired by East Troy-based Wisconsin Oven Corp. In 2019, he retires as president/CEO of Thermal Product Solutions LLC, the parent company of Wisconsin Oven—a position he has held since 2005. During his time at Wisconsin Oven, Strand served as honorary chairman of the United...
Tramont Mfg., a Milwaukee-based producer of diesel fuel tanks, enclosures, trailer tanks, and walkways for the standby power industry, has acquired Compo Steel Products. Compo is continuing operations as Motive Energy, a division of Tramont Mfg., at its current location less than a mile from...
Additive manufacturing took center stage in Detroit during the RAPID + TCT 2019 show that ran May 20-23 at Cobo Center. More than 350 companies exhibited 3D printing-related products and services and 6,000 attendees were expected. The RAPID event also gave attendees an opportunity to meet and speak with other members of the AM community […]
Nidec PressandAutomation, based in Minster, Ohio, has announced expansion projects on three continents, allowing the company to expand its press and component remanufacturing services. NPA combines the resources of Minster, Arisa, Kyori, Vamco, and SYS to offer these services worldwide....
Jenfab Cleaning Solutions, Springfield, Mo., a manufacturer of aqueous parts washing systems, has hired Mark Proffitt as plant manager and Kirsten Tuter as quality manager. Proffitt previously worked as vice president of operations for Baker Mfg. Co. in Alexandria, La. He also has served as a...
Ametek SMP Fine Tubes, Plymouth, U.K., has named Peter Brown as its new key equipment and facilities manager. He joins the company after working nine years in maintenance and operations management roles. Brown holds a bachelor’s degree in engineering with honors in manufacturing engineering with...
Lantek Systems Inc., a provider of manufacturing software for the sheet metal and fabrication industrial sectors, has entered into a collaborative agreement with the Basque Center for Applied Mathematics (BCAM). This international research center currently has a workforce of more than 90 high-level...