Finite element analysis

The need exists to fabricate graded metal-ceramic composites in bulk manufacturing processes for commercial applications. To address this need, a three-fold approach is employed: (1) control of the evolution of shrinkage strain and mechanical properties through the use of a nanoparticle sintering aid, (2) modeling of shrinkage-induced stresses to determine gradient architectures where cracking does not occur, and (3) fabrication of graded metal-ceramic composites using pressureless sintering and bulk molding technology. A new nanopowder TiO2 sintering aid was introduced to ...

The function of the loader arm of the high-speed pneumatic loader is to load the work piece from the conveyer belt into the die machine and vice-versa. The purpose of the work was to develop a Finite Element Model of the loader arm by using ANSYS Software. And with the help of the FEA model, the loader arm is optimized from stress and minimum deflection point of view. The knowledge of FEA and optimization is required to achieve the desired ...

Real-time identification and quantitative analysis of volatile and semi-volatile chemical vapors are critical for environmental monitoring. Currently available portable instruments lack the sensitivity for routine air quality monitoring, so preconcentrators are employed as front-ends for miniaturized chemical sensors. However, commonly used techniques for sensitivity enhancement have a time constant associated with adsorption/desorption or permeation of gas molecules being concentrated. Little work has been reported on fast-response concentrating techniques for gas sensing applications. This research is devoted to the development of ...

In this work, a new class of disk, contour-mode, piezoelectric, micromechanical resonators based on single-crystal Al0.3Ga0.7As films has been developed. The shape of the disk resonator is based on the velocity propagation profile of the elastic wave in the plane of the piezoelectric film, with lateral dimensions scaled to the half wave length of the desired resonance frequency. The resonators are designed with supports to emulate free-free boundary conditions. Finite element analysis (FEA) model for this resonator is created in ...

This dissertation investigates the durability of solder interconnects of area array packages mounted on Printed Wiring Assemblies (PWAs) subjected to dynamic flexural loads, using a combination of testing, empirical curve fitting and mechanistic modeling. Dynamic 4-point bend tests are conducted on a drop tower and with an impact pendulum. Failure data is collected and an empirical rate-dependent durability model, based on mechanistic considerations, is developed to estimate the fatigue failure envelopes of the solder, as a function of solder strain ...

Due to design and weight properties the automotive industry increasingly substitutes ordinary sheet metal with polymer products where one of these new materials is sheet molding compound (SMC). Therefore is an interest from the industry to do Finite Element Analysis (FEA) on these products. The goal was to create a program in Matlab that calculates the damage level in a tailgate during an open-close case. One solution to that problem is to use a linear material model in the FEA program, ...

During development work of new tools with cemented carbide inserts it is very important to have knowledge and understanding of how cutting forces and insert clamping forces are distributed on the common contact surfaces between insert and tip seat. The reason is that it becomes easier to design the insert and tool to prevent that plastic deformation and fatigue failure occurs and to ensure good function. The purpose of this report is to show how pressure and shear stresses distributes on ...