The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The contact strength of suspension restricts steering and driving of the vehicle. Based on the modern times contact dynamics theory and the finite element method, the double wishbone independent suspension contact model is created for a mini-car by using 3D sculpt software Pro/e, gridding compartmentalize software HyperMesh and finite element software ANSYS in this paper. The results agree with that...
This paper described a study on the dynamic responses and injury risk of rear seat occupant in side impact. A PSM (Prescribed Structure Motion) model was created based on a passenger car model, which consists of car side structures, a SID-Ils dummy and rear seat in MADYMO environment. The structural responses of the vehicle body were obtained from the FE simulation of side impact. The kinematics of...
This paper aims to study the effect of the rear seat structure on child occupant protection. According to GB15083-2006 standard, a finite element model of luggage cabin and rear-row seat was developed in LS-DYNA and validated via test results. The model was used in analysis of the safety performance of rear seat structure under luggage impact in car frontal crashes, in order to minimize the risk of...
Microgrippers play a crucial role in micro-/nanomanipulation systems dedicated to automatic handling of tiny objects. In this paper, an idea of modular design is proposed to devise a compliant microgripper with two degree-of-freedom (2-DOF) along with parallel translational motion of the gripper arms. A microgripper with 2, 3, and 4 arms is proposed as an illustration. The modular design enables easy...
To investigate the response of posterior cruciate ligament rupture on the biomechanics of other principal ligaments, the MRI images of normal human knee at various flexion angles(0¡ã,25¡ã,60¡ã and 80¡ã)were developed through SONATAMESTRO 1.5T and the intact and posterior cruciate ligament deficient knee models were built based on these images. Then three different loads were applied to these models...
In this paper, a FEM (finite element method) based mechanical model for PP (press-pack) IGBTs (insulated gate bipolar transistors) is presented, which can be used to calculate the clamping force distribution among chips under various clamping conditions. The clamping force is an important parameter for the chip, because it influences contact electrical resistance, contact thermal resistance and power...
A load-bearing transport element with permanent magnet for transport of rails is proposed. The element does not need any external source of energy and may be controlled by short current pulses delivered from an appropriate source fixed to the device. The paper presents the device and its mathematical model that is solved numerically. The results of an illustrative example are discussed.
A major challenge in high-speed Atomic Force Microscopy is the low vertical bandwidth of the Z-scanner feedback loop. The maximum vertical feedback bandwidth is limited by the first Z-axis resonance frequency of the scanner. In this article, the design of a fast Z-scanner for high-speed Atomic Force Microscopy is presented. The Z-scanner consists of a piezoelectric stack actuator and a diaphragm flexure...
In this paper, a model-based dynamics equation for the needle movement through the soft tissue is developed. A model-based control scheme which uses the force estimation calculated through the simulated tissue deformation data and the dynamic finite element as the tissue model is proposed. To compare the performance of the proposed controller, a PD controller is also used for the proposed needle dynamics...
The objective of this work is the calculation of forces and torque for a new type of motor, the harmonic motor, intended specifically for operation of brakes in vehicles. The motor offers the promise of eliminating a number of design limitations of existing electromechanical actuator systems. First, the motor eliminates the need for a gear set. This reduces the complexity of the package, which could...
A general analytical compliance model is presented for symmetric flexure hinges formed of serial segments of known compliances and with thicknesses defined analytically. Serial combination, mirroring, and translation of individual segments yield the flexure compliances. As an illustration, the compliances of a right elliptical corner-filleted flexure hinge are studied. For an aluminum sample with...
The frame three-dimensional entity model of a formula racing car is established on CATIA software platform, and is analyzed by finite element through the ANSYS software. Through the analysis of the static typical working conditions of the frame (bending and torsion conditions of the frame), find the affluent parts of the strength and stiffness of the frame, reduce the number of pipe fittings and diminish...
Bulk material fracture and interface delamination are main failure modes observed in microelectronic components. Drivers are stresses during processing (e.g. soldering), testing (e.g. moisture sensitivity, thermal cycling) and operation in application environments. For quantitative modeling to predict failures the fracture toughness expressed as critical energy release rate Gc has to be known by measurements...
This paper presents a model of needle tissue interaction forces that a rigid suture needle experiences during surgical suturing. The needle-tissue interaction forces are modeled as the sum of lumped parameters. The model has three main components; friction, tissue compression, and cutting forces. The tissue compression force uses the area that the needle sweeps out during a suture to estimate both...
As it is difficult to modelize the vibration active control of smart structure. Piezoelectric equations and the elastic mechanics equations are adopted to establish the electromechanical coupling finite element equations and dynamics equations of suspension smart structure with piezoelectric actuators. Then the finite element model of smart structure vibration control can be finally established. Since...
Chassis is one of the key components of tracked test vehicle. The strength and rigidity of chassis must be considered and structure resonance should be avoided during the process of structure design. The stress nephogram and strain nephogram of chassis are obtained, after static analysis in the finite element analysis software ANSYS. The maximum stress is 65.13MPa and the maximum strain is 0.00032mm...
The dual-primal finite element tearing and interconnecting (FETI-DP) method is combined with the tree-cotree splitting (TCS) method to expand the capability and improve the efficiency of the finite-element analysis of electromechanical devices. With the FETI-DP method, an original large-scale problem is decomposed into smaller subdomain problems and parallel computing schemes are then employed to...
In this paper, design and evaluation of short armature core double-sided transverse flux type PMLSM. First, structure and operational principle of the proposed model are introduced. Theoretical design for calculating thrust is then proposed for a design of core-pole combination, skewing, and chamfering. Finally, thrust is numerically evaluated through field calculations using 3-D finite element method.
This paper is concerned with a bearingless drive of a surface permanent magnet synchronous motor (SPMSM). Traditional bearingless motors have suspension windings for generating radial forces. But the motor in this paper have no suspension winding. At first, it is shown that a traditional SPMSM can generate a radial force by currents of motor windings. Second, problems and one solution for bearingless...
In this paper, the authors designed a surface permanent magnet (SPM)-type vernier motor whose maximum output is more than 5.2 kW, whose power factor at 4 kW is more than 90%, and whose efficiency at 4 kW is 85% under the conditions that the operating voltage, frequency, and synchronous speed are 400 V, 50 Hz, and 100 min−1, respectively.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.