Figure 1: Displacement results for our concrete slab simulation. The slab is supported in the center by a square column, and on the sides by a theoretical wall. © Glew Engineering Consulting, 2016 Time now for the last in our blog series on FEA. I’ve previously discussed how to set up CAD for FEA, how to mesh that CAD model and the different types of analysis that FEA programs can run. The next step in the process is generating results from the FEA simulation, like the displacement illustration in Figure 1. These are fantastic tools for generating useful reports, and [...]
Figure 1: Mesh, loads and constraints, ready for analysis © Glew Engineering Consulting, inc. 2016 Welcome again to our series on finite element analysis (FEA). In the last blogs, I covered steps on setting up a computer-aided design (CAD) model and how to set up the mesh and boundary conditions, the most crucial steps in FEA simulation. In this blog, I’ll look at the actual simulation and analysis, which can be the most time-consuming stage in the process. As a reminder, for an example I’ve been using a recent project we worked on involving punching shear in reinforced concrete. We were examining [...]
Figure 1: Giovanni Domenico Cassini We’ve been taking a break from hard-hitting mechanical engineering and materials science blogs with some pieces on the Italian masters of science, mathematics and engineering in the 16-19th centuries. In previous blogs, I explored the lives and contributions of mathematician/physicist Evangelista Torricelli and physicist/engineer Giovanni Venturi. For this blog, I'm focusing on Giovanni Domenico Cassini (Figure 1), a structural engineer and astronomer extraordinaire in the late 17th century. Cassini started small, studying astrology (not astronomy!) early on in his career, but his fascination with the actual scientific properties of our celestial neighbors and his lifelong dedication [...]
Figure 1: Closeup, exploded view of our concrete slab mesh © Glew Engineering Consulting, 2016 We'll continue on now with our blog series on finite element analysis (FEA). After discussing how to best set up a computer-aided design (CAD) model for FEA simulation, in this blog I'll cover the next step: meshing the model and applying boundary conditions. "Meshing" is the process by which the CAD model is separated into discrete finite elements; it can be done in the same program that runs the FEA numerical simulation later, or it might be performed in a standalone program, depending on [...]
Figure 1: Giovanni Battista Venturi [i] Glew's News is doing a short series highlighting the lives and accomplishments of the Italian Masters of science, engineering, and mathematics. In the last blog, I wrote about Evangelista Torricelli, a mathematician and physicist from the 17th century. In this blog, I'm focusing on Giovanni Venturi (Figure 1), an accomplished physicist, hydrodynamicist and engineer. Giovanni Battista Venturi (1746-1822) Giovanni Venturi was born to a wealthy family in Reggio, Italy in 1746. A talented young student, by the age of 23 the local seminary had already ordained him as a priest and professor. [...]
Figure 1: Reinforced concrete mesh © Glew Engineering Consulting Welcome back to our blog series on FEA. In the last blog entry, we introduced some of the fundamental concepts in finite element analysis (FEA). This entry in the blog series focuses on the initial steps in preparing a computer-aided design (CAD) model ready for use in an FEA program. Since FEA programs are very sensitive to the data they have to work with, it's important that the CAD models being analyzed are compatible with the analysis methods the FEA program uses. In order to illustrate my points throughout the blog series, I will introduce a recent [...]
Figure 1: Evangelista Torricelli Most people are familiar with the works of the “Italian Masters”… artists such as Leonardo da Vinci, Michelangelo and Raphael. But Italy has a storied history of masters of other fields, especially mathematics, science and engineering. In this blog series, we’ll take a look at a few of the influential renaissance men from The Boot who helped advance the fields of physics, chemistry, electricity, geometry, and more. These are the multi-talented renaissance men who tackled so many of the problems that now form the backbone of modern science, engineering, and technology. For this blog, I'll focus on [...]
Figure 1: FEA mesh and shear stress results for a reinforced concrete slab © Glew Engineering Consulting, 2016 Finite Element Analysis Consulting (FEA) In this series of blogs on FEA, we will first cover some basic elements common to many FEA projects, and then in subsequent blogs in this series, illustrate those methods through examples. One of the services that Glew Engineering Consulting provides is finite element analysis consulting (FEA). FEA consulting has been a great boon to the engineering profession, allowing mechanical engineers and civil engineers to accurately model the stress and strain behavior of complicated parts and assemblies prior to building physical [...]
Thermal Mass Flow Controllers A mass flow controller (MFC) for each gas line in a semiconductor tool’s gas panel measures and regulates the mass flow of the gas in order to set the gas entering the process chamber to the values in the process recipe. While pressure regulation and temperature control are needed for sensitive chemical vapor deposition (CVD), plasma etching, or thin film processes, gas flow control can be just as important. Semiconductor process recipes involve precise ratios of gas phase chemical to assure the correct stoichiomtery and reaction rates. Due to the accuracy and precision required [...]
An article on pressure transducers used in semiconductor fabs and semiconductor equipment.
Pressure gauges and pressure transducer use in semiconductor fabs.
Devices for regulating gas pressure in semiconductor processes.
Valve specification and design for high purity semiconductor equipment.
Mechanical engineering for high-purity processes in semiconductor fabs: gas distribution lines for transporting hazardous gases and materials.
Mechanical engineering design for high-purity processes in semiconductor fabs: process pumps, abatement and exhaust lines.
Mechanical engineering design for high-purity processes in semiconductor fabs: gas cabinets, liquid sources and valve manifold boxes.
Introduction to our blog series on the complexities of mechanical engineering design for high-purity gas panels in semiconductor fabrication.