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The socioeconomic impact of limb disabilities produced by injuries, traumas or congenital defects is evident in low-income countries, where there are often inadequate systems of trauma care and rehabilitation. The most medical schools in developing countries do not include a disability and rehabilitation component in their curricula. Even worst, many institutes do not have facilities or equipment...
This paper describes a wing mass estimation approach based on a bi-level optimization process and an automated CAD-CAE integration framework. The design framework goes through parametric CAD model generation, aerodynamic load calculation, finite element modeling, structural analysis and sizing. In the lower-level task, the wing box is sized to optimize the structural element thicknesses under a maximum...
A 3D FEM model of an FBG in a PANDA fiber with an extended fiber length of 25.4 mm is presented. Simulating long fiber lengths with limited computer power is achieved by using an iterative solver and by optimizing the FEM mesh. For verification purposes, the model is adapted to a configuration with transversal loads on the fiber. The 3D FEM model results correspond with experimental data and with...
The finite element model developed was able to capture the effects of loading rate and geometry. It was found that the predicted equivalent stresses of the human spleen subject to blast loads decreased with increasing load rate, even though viscous effects were found to be negligible. Therefore, the strain or loading rate (dynamic effects) must be correctly modeled, and reported so as to allow for...
During electrical wafer testing and wire bonding onto pad metallization, oxide layers in Backend-of-Line (BEOL) pad stacks are exposed to the risk of mechanical damage. Subsequent metal migration into oxide cracks leads to electrical device failure. We undertook simulation-based risk assessment using analytical and Finite Element Modelling (FEM) with regard to critical imprint depths in top metallization...
This paper presents a simulation of the steel wire rope of a certain type hoisting equipment to explore the distributions of stress and deformation in the process of lifting heavy loads. The SolidWorks software was used to establish the 3D solid model of the 6*6+WS structure of stone cross strand wire rope for a certain lifting equipment. Then the solid model of steel wire rope was imported into the...
The objective of the current research is focused on numerical simulation of cranio facial fracture under impact loading. Biomechanics of fracture, especially of a complex part of a human body such as skull, is one of the emerging areas of applications of computational bio-mechanics to understand the behavior of the skull during a traumatic injury, such as head impact during accidents. FEA (Finite...
The stray load losses in electrical machines represent a non-negligible contribution of the total losses and are a key point for an accurate evaluation of the energy efficiency of the considered device. In this paper, a methodology using the 3-D finite element (FE) modeling approach and a posteriori loss calculation is presented for the estimation of the stray load losses. The case of a cage induction...
An approach based on the hybridization of 3D finite element method and permeance networks is developed and applied for the modeling of a claw-pole synchronous machine. This model avoids the difficulties due to the movement and the complex geometry of the rotor and reduces the CPU time. A good agreement with experiments and full 3D models is obtained.
Thermal circuit models are based on the analogy between heat transfer and current flow equations. A thermal circuit model is extracted from a solid model of the package assembly by means of a mathematical model order reduction (MOR) algorithm. This algorithm automatically generates a SPICE netlist that can be used with standard analog circuit simulator, for simulation of transient operating conditions...
Predicting location of fracture in animal and human bones has been a keen area of research for the past few decades. It has been established that it is various types of stress that results into bone failure. Past studies were mostly based on experimental testing of variety of bones with limited accuracy equipment leading to experimental errors. An effort has been made in present research to use latest...
High-field superconducting magnets play a very important role in many large-scale physics experiments, particularly particle colliders and fusion confinement devices such as Large Hadron Collider (LHC) and International Thermonuclear Experimental Reactor (ITER). The two most common superconductors used in these applications are NbTi and Nb3Sn. Nb3Sn wires are favored because of their significantly...
Epoxy based polymers are widely used in the semiconductorindustry as thermal or/and electrical interfaces and as encapsulating material. In the automotive industry epoxy molding compounds are often used to protect not only singleIC packages but also the entire electronic control units (ECUs) or power modules. Fracture processes in mold materials used for the encapsulation of electro mechanical components...
Topology optimization for a considerable time has been successfully applied in the field of design for the development of light-weight structures. Especially in the aerospace sector, topology / topography optimization techniques are gaining recognition as effective tools for improving structural efficiency of newly designed aerospace vehicles. In that context, a study has been conducted on 5000 lb...
This paper explains a method to evaluate the bending stress at the root of Asymmetric Involute spur Gear using 3dimensional Photoelasticity method. Profiles of an asymmetric gear tooth on drive side and coast side have different pressure angles. The method ISO/TC-60 has been used to theoretically calculate the bending stresses. 3D CAD model of the said gear is generated in CATIA V5 R15 and the Finite...
Craniofacial defects (CFA) are a diverse group of deformities in the skull and facial bones. The cause is multifactorial though genes, food and environmental factors are the major causes. Cleft lip and palate is the most common congenital craniofacial defect. The objective of this work is to develop a three dimensional (3D) finite element (FE) model of human skull with complete unilateral cleft lip,...
Biomechanically, one of the important roles of the cerebrospinal fluid playing is to provide effective damping against sudden intracranial brain motion during head impact. Thus, the mesh density of cerebrospinal fluid in finite element model needs to be studied because of its significant impact on the brain's biomechanical responses, such as relative displacement. This study based on a previous finite...
This paper proposes cold heading and piecing which is quite complicated process. The study is based on defor7mation simulation and compared the parameters of production processes to factory. DEFORM is used to run the simulation in the case of piecing and heading stainless steel. Effective simulation result is founded by 720th stokes. The maximum load which occurs on the 512nd stoke is 8.22×105 N....
In spite of numerous studies on biomechanics of the mucous membrane supported dentures, satisfactory determination of the mucous membrane loads is still lacking. The aim of this study was to evaluate the effect of different mucosa thickness and resiliency on stress distribution of complete denture using a three-dimensional finite element analysis. A edentulous mandible with complete denture was converted...
This paper presents a visualization and verification for conceptual design of UNS LPPD hand based on previous studies. LPPD conducted and focused some researches on providing the low-cost prosthetic hand to respond the need of affordable prosthetic hand in Indonesia. Based on previous research, the new conceptual prototype is designed. The design must consider mechanical criteria by using simple electronic...
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