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To lightweight the engine connecting rod, and ensure it to meet the performance requirements, static equivalent load method was studied in the paper. Firstly, Connecting rod stress distribution was analyzed. Then, Multi-body dynamics model was established for the transient analysis, and connecting rod maximum stress was gotten when the engine working. Finally, Using equivalent static load method,...
The dynamic response of contact mechanics has significance important for durability and reliability design of gears. A finite element analysis model for dynamic response of contact mechanics of gear pair is established, and then the contact fatigue life of gear pair is analyzed based on the finite element model. The key parameters of contact finite element model is determined through the contact finite...
There are two classical equations in the research field of granularity properties, commonly known as Gates-Gaudin-Schahamann granularity equation (referred to as GGS) and Rosin-Rammler-Sperling granularity equation(referred to as RRB). If we combine the RRB or GGS with the unified energy granularity equation, we can get the energy equation which is more close to the actual production. Through the...
In wire bond process, wire bond recipe is predefined to wire bonder before the start of wire bonding. This wire bond recipe comprises of single step to multi steps bond force and ultrasonic control depending on type of wire material and bond pad technology to use in wire bonding program [1]. The program always start with wire bondability assessment by manipulate different bond force, ultrasonic power...
The fast algorithm for wheel and rail conformal and multipoint contact modeling is developed. The algorithm for solution of the normal contact problem does not require calculation of the integrals therefore CPU time is decreased. The FASTSIM algorithm is used for solution of the tangential contact problem. Results of solution with the fast algorithm application are compared with the results obtained...
In the event of natural disasters, catastrophes or war, efficient tools are needed to produce evacuation plans to evacuate the crowd safely. Disaster is an unplanned situation that can happen anywhere and anytime. The worst case is when disasters happen on large gatherings which can increase risk of death during egress evacuation. When an emergency arises, crowds will evacuate to the nearest exit...
In this paper the methodology of vertical jump analysis is presented. Measured results of vertical force during jump are presented. Six subjects (members of "Red star" football club) perform different types of jump (flywheel jump, jump without flywheel, and jump with landing on the left and right foot while vertical ground reaction force is measured using a force plate. One axial load cell...
In this paper we present a novel approach in multi-scale muscle modeling based on finite element method and Huxley crossbridge kinetics model. In order to determine the mechanical response of a muscle, we implement basic mechanical principles of motion of deformable bodies using finite element method. Constitutive properties of muscle are defined by the number of molecular interconnections between...
Rhytidectomy is an important research field of current beauty industry. Stretching wrinkles with an uniformly distributed pressure is a widely-used strategy. In this work, in order to evaluate the influence of the strategy on forehead skins, a numerical simulation of stretching forehead wrinkles was performed. By calculating the stretch ratio and stress in the stretching process, we found that stretching...
During the last two decades, there has been an upsurge in exploring the materials and fabrication techniques for microneedles, which promise almost painless penetration in skin. In such a scenario, it is extremely important to understand the mechanics governing the microneedles' penetration into skin alongwith a sound understanding of the flow mechanics governing the microdimensional channels of needles...
Actin stress fibers (SFs) play essential roles in cellular contractile force generation and resulting adhesion regulation. Although contractile properties of whole cells have been extensively studied, those intrinsic to individual SFs remain unknown. Here we isolate functional SFs from cells and directly measure the relationship between the shortening velocity and contractile forces generated by individual...
The effects of red blood cells on mass transfer in brain capillaries have been investigated using a novel hybrid method that includes the immersed boundary and lattice Boltzmann method. For simulation of the flow, the multi-relaxation-time lattice Boltzmann and for simulation of mass transfer across the capillary wall, the single-relaxation-time lattice Boltzmann is used. The present results indicate...
In this paper we design and simulate a novel 3D MEMS fabrication/ micro cutting facility using Chevron electro-thermal actuators. The design takes into consideration of the coupled Electrical-thermal-structural mechanism for the actuator. The cutting stroke length and cutting force generated by the application of input voltage to the actuator has been studied. For input voltages ranging from 0.4 V...
Designing the chassis needs to be done element simulation analysis to gain chassis strength on an electric city car. The purpose of this reasearch is to get the results of chassis simulation on an electric city car when having load using FEM (Finite element method). This research was conducted in several stages of process, namely: modeling chassis by Solidworks and finite element simulation software...
With piezoelectric layers attached, the electrostatically actuated microbeam-based MEMS (Micro-Electro-Mechanical Systems) is modelled to study the pull-in instability based on a modified couple stress theory. The nonlinear differential governing equation and boundary conditions of the beam are derived by using Hamilton's principle. The results show that the piezoelectric layers can decrease the pull-in...
In previous research, by conducting fretting analyses and experiments on tin-plated connector terminals, the importance of rotational motion and its advantages in modeling the fretting phenomena were revealed. Rotational motion is dominant in the typical fretting driven by vibration. Additionally, linear sliding is difficult to analyze because of the asymmetry of the fretting trace. This paper presents...
The storage degradation test system for aerospace electromagnetic relay (EMR) is designed, which uses FPGA and ARM SCM architecture as system's hardware core. The degradation data rule of pick-up time parameters for aerospace EMR is tested. And the variation law of pick-up time changing with time is obtained. The change of pick-up time is analyzed and verified, which is mainly caused by reeds reaction...
In the paper, boundary integral equations are derived for the problem of an isotropic homogeneous elastic half-plane with a cavity of an arbitrary configuration. The initially straight-line boundary is assumed to be fixed under a given displacement while the cut surface is subjected to a certain load. A concentrated force is also applied at an inner point of the half-plane. Using the complex variable...
Occasionally thermally stressed connectors have come back from the field with initial investigations confirming the crimp height was slightly above the upper design specification limit. Experimental designs were then conceived and conducted independently at both TE Connectivity and Whirlpool Corporation to investigate if the out-of-specification crimp heights were a result of the overheating in the...
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