A Mechanical Engineer Designs Ways to Give Your Canine Friend a Lift Up: Dog Ramps

2018-02-15T10:34:21-07:00

A Mechanical Engineer Designs Ways to Give Your Canine Friend a Lift Up  A Mechanical Engineer designs ways to give your "Best Friend" easy access to your vehicle and different higher surfaces. Read more to find out what kind of options are available for your dog.  A properly sized and installed dog ramp eases a dog's boarding dilemmas.  Ramps are divided into several categories: folding, telescoping, fixed, moveable and those that are stored under the back bumper of a car.  This article describes the different types of dog ramps available and the engineering required to properly design them.    Fig. 1 Mechanical Engineers Design Easy Car Access for Dogs Mechanical Design, Materials Science,  Weight, and Ease [...]

A Mechanical Engineer Designs Ways to Give Your Canine Friend a Lift Up: Dog Ramps 2018-02-15T10:34:21-07:00

Licensed Mechanical Engineers Help You Ditch Suburbia

2018-02-13T23:41:15-07:00

Licensed Mechanical Engineers Help You Ditch Suburbia Licensed Mechanical Engineers Ensure Vehicle Safety and Comfort The recreational vehicle industry (Fig. 1) is flourishing.  People can use their RVs full time part, part time or travel the country for months at a time. A Licensed Mechanical Engineer (Licensed Mechanical Engineers Role in Manufacturing) makes certain that travel is safe and comfortable at the same time, without missing out on the comforts of home and your favorite kitchen. (Fig. 2)  Recreational vehicles' kitchens are designed with adequate ventilation to ensure that no fires occur.    Across that spectrum, the RV industry is enjoying an unprecedented growth.  Who are these RVers? They love the beauty and solace of being outdoors, abiding [...]

Licensed Mechanical Engineers Help You Ditch Suburbia 2018-02-13T23:41:15-07:00

Licensed Mechanical Engineers Create Animal Prosthetics

2018-02-15T11:11:34-07:00

Animal Prosthetics are a widely varying field with many different interfaces.  Licensed Mechanical Engineers add immense insight into material selections, gearing, wear, and vibration response.   From disease prevention (heating, ventilation, hospital room design) to surgical tools, mechanical engineering has vastly changed the art of healing sick and injured animals.  A Licensed Mechanical Engineer can develop a variety of apparatus' for the Animal Kingdom to increase   mobility. Animal prosthetics are a relatively new phenomenon, and their technology is improving at a rapid pace.  Animal Prosthetics are Designed by Licensed Mechanical Engineers Animal Prosthetics are a widely varying field with many different interfaces.  Licensed Mechanical Engineers add immense insight into material selections, gearing, wear, and vibration response. An actuated prothetic [...]

Licensed Mechanical Engineers Create Animal Prosthetics 2018-02-15T11:11:34-07:00

Licensed Mechanical Engineer Models, Designs and Tests Air Purifier Technologies

2018-04-05T11:42:20-07:00

Fig. 1  Triple HEPA Filter   Licensed Mechanical Engineers Design and Model Smoke Purification Equipment Fires across the country, including Oregon, Montana, Idaho, Washington, and especially in California consume thousands of acres of forests, homes and businesses.  With smoke-filled skies make air-purifiers a necessity.  Smoke from a wildfire can travel hundreds of miles to infiltrate homes and offices.  A licensed Mechanical Engineer ( Licensed Mechanical Engineer ) models, develops and tests smoke and particle filters (Fig. 1) to effectively remove smoke from the air in your home or workplace.   We added air filters to our offices in the Silicon Valley during the height of the fires. Early Mechanical Engineers  As early as the 1600s, Mechanical Engineers and physicians decided that [...]

Licensed Mechanical Engineer Models, Designs and Tests Air Purifier Technologies 2018-04-05T11:42:20-07:00

Mechanical Engineering Consulting Firm Solves Truck Axle Failure

2018-02-02T14:08:05-07:00

Mechanical Engineering Consulting Firm Solves an Axle Failure Attorney Requested Mechanical Engineering Consulting and Litigation Support Glew Engineering provides mechanical engineering consulting to high technology and industry.  As is often the case, an attorney asked us to provide an independent 3rd party review of the cause of repeated torsion axle failures on a semi-truck trailer that his client experienced.  We obtained the failure information and photographs from the client and researched the trailer and its axle configuration.  As mechanical design experts, we formulated an unbiased opinion on why the trailer’s axles failed multiple times despite being under the rated loads.  For the final phase of our litigation support, we wrote and expert report documenting our findings.   Litigation Support [...]

Mechanical Engineering Consulting Firm Solves Truck Axle Failure 2018-02-02T14:08:05-07:00

Mechanical Engineering Consultants Use 3D CAD Software Comparison via Custom Motorcycle Frame: Creo vs Solidworks vs Inventor: Part 2

2018-03-08T12:14:53-07:00

3D CAD Software Comparison Blog Series: Starting the Motorcycle Frame Design in Solidworks™  Welcome back to our 3D CAD software comparison blog series. Recall that in last week’s discussion, as Mechanical Engineering Consultants we introduced our plan to to model a motorcycle frame in three different 3D CAD software packages.  We gave a brief history of the three CAD software packages that Glew Engineering employs: Solidworks™, Creo™, and Inventor™. In this week’s blog, as Mechanical Engineering Consultants we use Solidworks™ CAD software to model a portion of the motorcycle frame, a simple tube, while comparing three modeling techniques: Extruding Sweeping Weldment Motorcycle Frames We designed a simple bobber inspired motorcycle frame, this is conceptual, yet realistic enough to illustrate [...]

Mechanical Engineering Consultants Use 3D CAD Software Comparison via Custom Motorcycle Frame: Creo vs Solidworks vs Inventor: Part 2 2018-03-08T12:14:53-07:00

Energy Efficient Solutions for Everyday Energy Efficiency Problems

2018-02-20T11:19:59-07:00

As energy efficient environmentally conscious engineers, we here at Glew Engineering do what we can to save energy and resources both around home and around the office.  This might mean choosing products that are more environmentally friendly or energy efficient.  It might mean using our surroundings to our advantage, like pulling cold air through a home or office at night so the building needs less air conditioning the next day.  The most satisfying thing, though, is to employ our knowledge of mechanical engineering, materials science and thermal management to design custom hand-tooled solutions.  In the next few blog posts, I'll review some of the current in-house engineering projects that are underway here and maybe give our readers a little inspiration [...]

Energy Efficient Solutions for Everyday Energy Efficiency Problems 2018-02-20T11:19:59-07:00

Wind Load CFD Modeling for Rooftop Elements Compared to ASCE 7

2018-02-20T11:28:46-07:00

  Wind Load Comparison between CFD and ASCE 7 for Rooftop shapes Welcome back to our blog series on the phenomenon called Wind Load CFD Modeling and how it affects civil and mechanical engineers.  Wind Load is the force that blowing wind exerts on any device or structure that extends above ground level.  After an initial introduction to the factors that affect wind load on an object, I compared three different sets of wind load calculation methods using three simple objects, hypothetically placed on a 100-foot-tall building.  Starting with generic drag equation for the first equation, added two modification coefficients called "gust factor" and "exposure coefficient" for the second equation.    I used the model for rooftop objects for the [...]

Wind Load CFD Modeling for Rooftop Elements Compared to ASCE 7 2018-02-20T11:28:46-07:00

Comparing Wind Load Calculation Methods

2018-02-21T15:26:59-07:00

Wind Load Calculation Wind Load Calculation is an overview of the force that blowing wind exerts on a tall object.  A number of factors that influence the actual wind load on a real building, include the surrounding terrain, nearby structures,  trees, and typical weather patterns for the area.  Comparing wind load calculations are most complicated . Calculations try to account for as many of these external factors as possible, to the point where the wind load section in American Society for Civil Engineer’s ASCE 7 standard, spans five chapters and over 100 pages. Fig 1: Wind load calculation example structures ASCE 7's Applications Comparing one of ASCE 7’s Applications with the two equations [...]

Comparing Wind Load Calculation Methods 2018-02-21T15:26:59-07:00

Wind Load Calculations and Modeling

2018-02-20T12:26:27-07:00

 Part 1 of our Wind Load Series “Wind load” is a calculated value representing the total force on a structure or object cause by pressure from wind moving over it.  In this blog series, we will discuss different methods for wind load calculations, the factors that influence its magnitude, and the effects a high wind load can have on a structure.  Wind load is most commonly addressed by civil and structural engineers when designing buildings, but mechanical engineers can encounter the effect when designing tall objects like cranes, telescoping communications masts or wind turbine towers. Wind Load Essentials As a force, wind load is the product of pressure distributed over an area (psf times ft2 or Pa times m2).  In [...]

Wind Load Calculations and Modeling 2018-02-20T12:26:27-07:00

Window Energy Efficiency: Solar Heat Gain and Visible Transmittance

2018-08-22T11:55:28-07:00

Conduction and Radiation of Thermal Energy In my last blog post, I wrote about the conduction and radiation of thermal energy through windows and the thermal transmittance value, called the U-Factor, that characterizes that heat transfer.  The U-factor is useful in evaluating window performance and making wise decisions when specifying components for a building, but it is only one piece of the puzzle.  The National Fenestration Research Council (NFRC) mandates a second value alongside U-factor in its certification process, called the Solar Heat Gain Coefficient (SHGC).  SHGC represents the ability of a window to resist heat gain from radiation, like the sunlight in Figure 1.  This is obviously a challenge, given that the entire point [...]

Window Energy Efficiency: Solar Heat Gain and Visible Transmittance 2018-08-22T11:55:28-07:00

Window Energy Efficiency: Thermal Transmittance

2018-08-22T11:46:58-07:00

Figure 1: Windows catching sunlight By Magda S [FreeImages.com Content License] In our last blog post, I wrote about the thermal resistance (R-value) and transmittance (U-factor) of insulation and windows.  The R-value represents how well a material prevents heat transfer through its thickness, and U-factor is its inverse, representing how much heat a material will conduct through.  These values are fairly simple to calculate for most building materials materials like the bricks and panels in Figure 1, as they primarily experience only conductive heat transfer.  Windows are a more challenging proposition, however, since the heat transfer through them includes radiation across the entire spectrum, not just the visible light we see and the infrared we feel.  In [...]

Window Energy Efficiency: Thermal Transmittance 2018-08-22T11:46:58-07:00

Energy Efficiency in Building Materials, Insulation and Windows

2018-04-04T09:48:28-07:00

Figure 1: FLIR image of two houses showing energy loss. Colors towards red on the scale indicate warmer surfaces and more energy loss. The basic principle behind thermal insulation is simple to understand.  The harder it is for heat to travel through a material, the better insulator that material will make.  In this blog, I’m going to take a look at how that effectiveness is quantified, after a brief review of the three methods of heat transfer.  The building and construction industry use a ratio called the R-factor to indicate how well a building material can insulate a space.  Also called the thermal insulance or thermal resistance, a higher R-value indicates a more effective insulator. Heat Transfer Methods There are [...]

Energy Efficiency in Building Materials, Insulation and Windows 2018-04-04T09:48:28-07:00

Italian Masters: Leonardo da Vinci – Artist, Engineer, Scientist

2018-02-20T13:14:29-07:00

Figure 1: Leonardo da Vinci, by Francesco Melzi Over the course of this blog series, I have written about a number of Italian Masters of science and engineering, from astronomers like Galileo and Cassini to physicists like Torricelli and Venturi.  I’ve saved the best for last, however: Leonardo da Vinci.  He is the quintessential renaissance man who fits both our running definition of “Italian Master” as well as being included in the standard list of Masters with Rafael, Donatello and Michelangelo  Leonardo’s incredibly broad array of talents and interests have long been the subjects of movies, books, TV shows, and, of late, video games.  Throughout his life, he had one hand in the arts, ranging from painting, sculpting, music, history, and literature, [...]

Italian Masters: Leonardo da Vinci – Artist, Engineer, Scientist 2018-02-20T13:14:29-07:00

Thermal Expansion in a Glass and Aluminum Window: Part 2

2018-02-20T13:29:14-07:00

Figure 1: Simplified model of an aluminum-glass window   In last week’s blog, Thermal Expansion in a Glass and Aluminum Window: Part 1, we introduced the basic concept of thermal expansion in solid materials.  Since CTE mismatch can impose extremely high stress, during mechanical engineering design one must consider the temperature exposure and expansion or contraction of a material.  In order to help the read gain insight, we used a simplified aluminum-framed window to demonstrate that a hot summer day would be enough to shatter glass if the window wasn’t equipped with a flexible gasket between the frame and the glass.  For this entry, we utilize a finite element analysis (FEA) to elucidate the stress effects caused by both high and [...]

Thermal Expansion in a Glass and Aluminum Window: Part 2 2018-02-20T13:29:14-07:00

Italian Masters: Volta Jump-Starts Electrical Engineering

2018-02-21T10:28:40-07:00

Italian Masters: Volta Jump-Starts Electrical EngineeringFigure 1: Girolamo Cardano (1501-1576) Welcome back to our series on Italian Masters of math and science.  Last week I wrote about Galileo’s extensive accomplishments both in the field of astronomy and beyond.  This week, I’ll take a look at another renaissance polymath who dabbled in astronomy, along with his work in mathematics, medicine, biology, chemistry, philosophy, and gambling (yes, seriously): Girolamo Cardano.  Cardano is a less well-known figure than Galileo or some of the other scientists I’ve written about who have famous equations or units of measurement named after them, like Volta or Torricelli.  He is regarded as one of the greatest mathematicians of his age, however, and made a great many contributions to science, [...]

Italian Masters: Volta Jump-Starts Electrical Engineering 2018-02-21T10:28:40-07:00

Thermal Expansion in a Glass and Aluminum Window: Part 1

2018-02-21T10:38:23-07:00

Equipment designers must accommodate thermal expansion (CTE)of dissimilar materials, especially when they are subject to large temperature changes.  This problem is often called "CTE mismatch."  In this blog, we give the fundamentals of thermal expansion calculations used in thermo-mechanical analysis. These calculations are simple but useful, and easy enough to perform by hand or with a spread sheet. For more complicated shapes, one must use computer modeling.  As an example, we perform a finite element analysis (FEA) in a later blog http://glewengineering.com/thermal-expansion-in-a-glass-and-aluminum-window-part-2/, of a glass and aluminum window and frame to show where the stress is excessive.  This points to the obvious need for a gasket to perform as a thermal interface material, in order to lessen [...]

Thermal Expansion in a Glass and Aluminum Window: Part 1 2018-02-21T10:38:23-07:00

Italian Masters: Galileo’s Stellar Science and Engineering

2018-02-21T10:55:17-07:00

Portrait of Galileo Galilei Justus Sustermans [Public domain], via Wikimedia Commons I’d like to return to our previous series on the Italian Masters, focused not on the usual masters or painting and sculpture but on the masters or science, mathematics, and engineering.  So far in the series I’ve written about the accomplishments of Volta, Cassini, Venturi and Torricelli.  Today, I’d like to look at one of the greats: Galileo Galilei.  Galileo is most famous today for standing up for heliocentrism against the Catholic Church and spending the last years of his life under house arrest as punishment.  However, Galileo didn’t let controversies or confinement stop him, and accomplished a great amount of research in not only [...]

Italian Masters: Galileo’s Stellar Science and Engineering 2018-02-21T10:55:17-07:00

12 Years a Martian: Mechanical Engineering on Mars, The Red Planet

2018-04-10T16:24:41-07:00

Figure 1: Mars Exploration Rover mobility testing By NASA

12 Years a Martian: Mechanical Engineering on Mars, The Red Planet 2018-04-10T16:24:41-07:00

Semiconductor Safety: Pyrophoric Gases

2018-02-21T15:25:24-07:00

Fig. 1 Tall Fire from Chemical We have written about pyrophoric materials in a number of Glew Engineering’s previous blogs on safety in semiconductor fabrication, but have yet to cover how to define it or its danger.  At its simplest, a pyrophoric substance is any substance that spontaneously ignites in room temperature air.  As one might imagine, spontaneous combustion on contact with the regular atmosphere we live in can be quite dangerous. Last year, Glew Engineering assisted a research lab in designing a safe gas distribution system for their plasma-enhanced chemical vapor deposition chamber.  During the initial work, the building administrators and safety managers were concerned about the lab’s proposed use of silane and germane, two pyrophoric and toxic materials.  To them, [...]

Semiconductor Safety: Pyrophoric Gases 2018-02-21T15:25:24-07:00