3D CAD FEA – Finite Element Analysis

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Finite Element Analysis (FEA) as a ‘bolt on’ software for 3D CAD software has been around a while to aid mechanical engineering design. The software over this time has improved in leaps & bounds and it’s price has also come down over the years. (In fact IronCAD, one of the 3D CAD packages we use, has just released it’s latest FEA with even more features!)

A definition might be:

Finite element analysis (FEA) is a computerized method for predicting how a product reacts to real-world forces, vibration, heat, fluid flow, and other physical effects. Finite element analysis shows whether a product will fail, wear out, or work the way it was designed”

FEA enables design engineers to simulate environmental conditions of engineering parts or products in service, which can be static and/or dynamic, it is never a true replacement for ‘real life’ service conditions, but greatly increases the probability of design success. Once a product or part has been designed on CAD it’s true test before reaching end users or customers, would usually be under ‘real life’ test conditions as a prototype (often extreme conditions) in a laboratory, where other factors might be included as well such as corrosion.

Hope you enjoyed the blog and that you have a good month

All the best

Mike

Quotation corner:

“Everything is changing. People are taking the comedians seriously and the politicians as a joke.”

Will Rogers

“A lot of people are afraid of heights. Not me, I’m afraid of widths.”

Steven Wright

ps  If you have enjoyed the blog please forward to those who might be interested, many thanks in advance, Mike

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Posted in 3d, business, cad, COMPUTER SIMULATION, design, Engineering, engineering development, environment, failure, FEA, Heat Energy, humor, humour, Industry, manufacturing, material science, MECHANICAL ENGINEERING, Physics, precision engineering, quotations, quotes, research science, Simulation, Stress Analysis, technology | Tagged , , , , , , , , , , , , , , | Leave a comment

Trust me I’m an Engineer #2 !

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A sample of images of how we sometimes get things wrong – enjoy !

Engineering Blooper #14_

Who moved the building ?

Engineering Blooper #15_

Not very convenient !

 

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CCTV video footage draws a blank on recent criminal activity !

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I hope & pray this works !

 

Plus a link below of a video clip of  The Two Ronnies – Four Candles sketch, as a light way to end the year – enjoy !

http://www.youtube.com/watch?v=CNTM9iM1eVw

Happy & Prosperous 2019

All the best

Mike

Posted in civil engineering, Comedy Sketch, design, Engineering, Engineering Mistakes, humor, humour, mechanical, mistakes, Uncategorized | Tagged , , , , , , , | Leave a comment

AM – a manufacturing revolution

3D Metal Printer_#1_  3D Metal Printer_#2_

AM (Additive Manufacturing) costs are reducing and combined with it’s flexibility to manufacture quickly bespoke designs from CAD models, is slowly taking sector ground from more traditional manufacturing methods. The range of materials that can be used has increased (including various plastics & polymers and now metals) is giving rise to a range of products with custom mechanical properties and related costs. Another advantage of AM is the introduction of a material’s porosity that decreases density and therefore weight of a given product with a disproportionately low effect on mechanical properties in most cases.

The medical and dental sectors have been revolutionised by AM over the last few years allowing the production of patient specific unique geometries such as crowns, bridges or custom hip implants. Recently Adidas with their Futurecraft 4D product line use AM to produce shoes that are customised to the needs of individuals.

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Chris Sutcliffe, R&D director of AM products at Renishaw, mentions that ‘AM can help in the production of families of products based on a parametric CAD file, allowing manufacturers to create a series of products of perhaps different sizes or amendments to suit their purpose’.

The future looks bright for AM with the potential of ‘multi-functionality in serial parts delivered at production rates – a real tangible benefit of AM’.

Hope you have a great month

All the best

Mike

Quotation corner:

“I always wanted to be somebody, but now I realize I should have been more specific.”

Lily Tomlin

“All generalizations are false, including this one.”

Mark Twain

ps  If you have enjoyed the blog please forward to those who might be interested, many thanks in advance, Mike

 

Posted in 3d, 3D Printing, additive manufacturing, business, cad, design, humor, humour, manufacturing, material science, mechanical, MECHANICAL ENGINEERING, precision engineering, printing, quotations, quotes, research science, technology, Uncategorized | Tagged , , , , , , , , , | Leave a comment

Wheel Revolution !

Reconfigurable Wheel-tracks_#2_  Reconfigurable Wheel-tracks_#3_

There has always been a design ‘trade off’ for vehicle design engineers with regard to vehicle propulsion on different terrains – need for speed, energy efficiency and low noise for the road, as against stability and traction for the off road.

Engineers at Carnegie Mellon University in Pennsylvania may have come up with a solution with a prototype design called ‘reconfigurable wheel-tracks’ (RWTs). These consist of wheels that have tracks on their circumference which can be reshaped into triangles on the move and operate as traditional off road tracks.

The advantage of course is the adaptability to different terrains within seconds, the disadvantages are potential clogging of the moving parts of which there are many, potentially high maintenance, and the complexity that could make it prohibitively expensive.

Despite this the US Defense Advanced Research Projects Agency (DARPA) are very interested in this new innovation because it can be retro fitted to standard army vehicles such as the Hummer, increasing it’s the safety & versatility.

Please see video link below.

http://www.youtube.com/watch?v=o8QtJeNHrNQ

Hope you have a great month

All the best

Mike

Quotation corner:

“I like long walks, especially when they are taken by people who annoy me.”

Fred Allen

“If a book about failures doesn’t sell, is it a success?”

Jerry Seinfeld

ps  If you have enjoyed the blog please forward to those who might be interested, many thanks in advance, Mike

Posted in design, Engineering, engineering development, humor, humour, manufacturing, mechanical, Military, Propulsion, quotations, quotes, research science, technology, Traction, travel, Uncategorized, Vehicle | Tagged , , , , , , , , , , | Leave a comment

Infrared Rectenna – waste heat recovery

 

Heat Rectenna_

Researchers from Sandia National Laboratories have developed a tiny silicon-based device that can harness what was previously called waste heat and turn it into DC power. It is a solid-state device with no moving parts to jam, bend or break, and doesn’t have to directly touch the heat source, which can cause thermal stress. It is also the size of a small finger nail !

Paul Davids, a physicist and the principal investigator for the study says, “We have developed a new method for essentially recovering energy from waste heat. Car engines produce a lot of heat and that heat is just waste, right? So imagine if you could convert that engine heat into electrical power for a hybrid car. This is the first step in that direction, but much more work needs to be done.”

What a useful invention that could recoup heat losses from engines and any other devices. This could have many applications, including millions of vehicles powered by internal combustion engines throughout the world, saving power and therefore lowering emissions !

For more info: http://revolution-green.com/infrared-rectenna-generating-electrical-power-waste-heat/

Hope you have a good month

All the best

Mike

Quotation corner:

“My dog used to chase people on a bike a lot. It got so bad, finally I had to take his bike away”

– Annonymous

“Go to Heaven for the climate, Hell for the company.”

– Mark Twain

ps  If you have enjoyed the blog please forward to those who might be interested, many thanks in advance, Mike

 

Posted in business, Car, design, electrical engineering, Electronics, Energy, engine, Engineering, environment, Heat Energy, Heat Recovery, humor, humour, manufacturing, renewable energy, technology, transport, Uncategorized | Tagged , , , , , , , , , | Leave a comment

Tragedy of Italian Bridge Collapse

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The Italian port city of Genoa experienced a terrible bridge collapse just one day before Italy’s major summer holidays on 14 August. A large section of the Morandi bridge collapsed amid heavy rainfall. Dozens of vehicles plunged 45m amid heavy traffic resulting in a death toll of 43. Genoa residents Carmelo and Wanda Presti said they thought there was an earthquake when they heard the sound of the bridge collapsing.

Part of the 1.2km (0.8 mile) long bridge spans the Polcevera waterway, with other portions reaching over railway lines and buildings.

It was designed by Riccardo Morandi and completed in 1967, but restructuring work was carried out in 2016.

Reasons for the collapse:

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> Some experts have suggested that the ongoing maintenance work may have been a factor in the collapse.

> Others have suggested it may have been caused by a design flaw or heavy traffic.

> The bridge sees some 25 million vehicles every year, and a 2011 report by an Italian highways company said that the bridge had been suffering from degradation.

Antonio Brencich, a structural engineer who lectures at Genoa University, wrote in 2016 that it may have been more economical to rebuild the bridge because of the ongoing maintenance costs. “There are errors in this bridge. Sooner or later, it will have to be replaced. I don’t know when,” he warned.

Our thoughts & prayers are with the friends & families of the victims.

Let’s hope there is a thorough engineering inspection and risk assessment of other bridges in Europe to avoid a similar disaster.

Hope you have a good month

Mike

Reference: BBC News, ABC News
Posted in Bridges, business, civil engineering, design, Engineering, Europe, failure, material science, mechanical, MECHANICAL ENGINEERING, technology | Tagged , , , , , , , | Leave a comment

Gas Turbine Blades – 3D Printed !

Gas Turbine Blade_ AM Gas Turbine Blade #2_

3D Printing has come along way since it was first introduced a few years ago. It is now used in defence, aerospace, and automotive industries and has moved on to metal parts, and is referred to as AM (additive manufacture). The process consists of a nozzle that adds thin layers of metallic powder to a bed and a laser directed above, moves along the surface and melts the powder to form a solid metallic layer to a given design. The design itself is created as a 3D CAD model and imported into the printing machine.

The oil & gas industry has been a slow adopter to AM due to it’s inherent risk averse culture, but is now following suit with Siemens leading the way by producing gas turbine blades – presently at a pre-production level. New blade designs can be made within a few months, whereas with traditional casting & forging this could take up to 2 years. With AM new complex blade designs are now possible which can increase turbine efficiencies – such as lowering operating temperatures. There is also minimal waste material, and physical stock levels can be reduced with Just In Time manufacture – again reducing costs.

The use of AM has dramatically reduced production costs for the defence, aerospace & automotive industries – for example Boeing reduced costs by $1m on the production of it’s 787 Dreamliner simply by using printed parts !

Hope you have a great month

All the best

Mike

Quotation corner:

“Wine is a constant proof that God loves us and loves to see us happy.”

– Benjamin Franklin

“If this is coffee, please bring me some tea; but if it is tea, please bring some coffee.”

– Abrahm Lincoln

 

ps  If you have enjoyed the blog please forward to those who might be interested, many thanks in advance, Mike

 

Posted in 3d, 3D Printing, business, cad, design, Energy, engine, Engineering, engineering development, Gas Turbine, humor, humour, Industry, manufacturing, MECHANICAL ENGINEERING, power generation, precision engineering, quotations, quotes, technology, turbine, Uncategorized | Tagged , , , , , , , , , , | Leave a comment