Monthly Archives: October 2016
The global automotive industry has been growing constantly. Technologies such as connected transport, smart driver experience, improved battery management systems and better fuel efficiency are reforming the automotive industry.Innovation never stops!
Automotive manufacturers are required to work in uncertain conditions with increasing complexity as a result of wide range of products available to the customer, changing technologies, increasing pressure to innovate, environmental concerns and globalization.
Engineers are constantly under pressure to develop products that are future-proof. Hence, it is vital to bring the right expertise together that can combine multiple engineeringdisciplinesto handle challenging applications that lead to faster production.
Simulation-based engineeringhelps develop the products in a risk-free environment. This is a faster and more cost effective way to test the products when the expectations are high and failure can be disastrous.Simulation is the key to shorteningtime tomarket as it will accelerate the workflow from design to prototype.
COMSOL Multiphysics enables automotive engineersto accurately investigate design concept to production and fully benefit from the virtual prototyping capabilities that it offers. With COMSOL Multiphysics engineers can couple electromagnetics with heat transfer, structural mechanics, fluid flow, and other physical phenomena, allowing them to accuratelysolve real world problems.
A thermoelectric cooler application is one of 50 app examples available with COMSOL Multiphysics. The user may test different geometries, thermocouple configurations, and material selection in order to determine the ideal cooler option for a specific configuration or an optimized design for best performance.
Researchers working within the automotive industry have used COMSOL Multiphysicsto study corrosion in automotive parts found in car paneling, for example. Simulation helpsresearchers investigate electrochemical reactions on the surface of the rivet, analyze decay in sheet metal, and understand the effects of geometry in the corrosion process.
More recently, an investigation into the cause of the accident that killed the actor Paul Walker revealed that the Porsche Carrera GT in which he was riding had nine-year-old tires. The California Highway Patrol noted that the tires’ age might have compromised their drivability and handling characteristics, according to the Los Angeles Times.
These incidents illustrate not only the potential danger of buying used tires but also the perils of driving on aging tires — including those that have never spent a day on the road.
For years, people have relied on a tire’s tread depth to determine its condition. But the rubber compounds in a tire deteriorate with time, regardless of the condition of the tread. An old tire poses a safety hazard.
For some people, old tires might never be an issue. If you drive a typical number of miles, somewhere around 12,000-15,000 miles annually, a tire’s tread will wear out in three to four years, long before the rubber compound does. But if you only drive 6,000 miles a year, or have a car that you only drive on weekends, aging tires could be an issue. The age warning also applies to spare tires and “new” tires that have never been used but are old.
What Happens to a Tire as It Ages?
Sean Kane, president of Safety Research & Strategies, Inc., compares an aging tire to an old rubber band. “If you take a rubber band that’s been sitting around a long time and stretch it, you will start to see cracks in the rubber,” says Kane, whose organization is involved in research, analysis and advocacy on safety matters for the public and clients including attorneys, engineering firms, supplier companies, media and government.
That’s essentially what happens to a tire that’s put on a vehicle and driven. Cracks in the rubber begin to develop over time. They may appear on the surface and inside the tire as well. This cracking can eventually cause the steel belts in the tread to separate from the rest of the tire. An animation on the Safety Research & Strategies Web site shows how this happens. Improper maintenance and heat accelerate the process.
Every tire that’s on the road long enough will succumb to age. Tires that are rated for higher mileage have “anti-ozinant” chemical compounds built into the rubber that will slow the aging process, but nothing stops the effects of time on rubber, says Doug Gervin, Michelin’s director of product marketing for passenger cars and light trucks.
We hear it all the time: “Where can I find a good car mechanic?” In the past, word of mouth was probably the best way to find an auto repair shop that would do the job right and charge a fair price. But now, a good mechanic might be only a few mouse clicks or touchscreen taps away.
Crowdsourced review sites have greatly simplified the search. Here are a few tips on how to work these sites to find a good car mechanic in your area. Keep in mind that this isn’t an exact science. Sometimes a highly rated shop might disappoint, but at least you can tilt the odds in your favor.
Yelp.com describes itself as a site that “connects people with great businesses,” whether that’s a hot new restaurant or a top-notch dentist. And, luckily for car owners, it also has auto repair reviews. The site is free and has a mobile version, plus apps for Android and Apple mobile devices.
We’ve had good experiences with Yelp recommendations as we looked for a mechanic to work on Edmunds’ long-term 1996 Lexus ES 300, which is the subject of our Debt-Free Car Project. With our new long-term vehicles, we tend to use dealerships exclusively. But because containing costs is important for the Lexus project, we’ve used Yelp four times to locate independent mechanics. Of the four, we would go back to three of them. We’ve found Yelp to be the most useful site, thanks to its review volume and convenience.
Here are a few tips to help you narrow down your mechanic search. Type “auto repair” into the search field and enter your ZIP code. You can filter the results based on distance, most reviewed and highest rated. The goal should be to find a place that strikes a balance between a good rating and a substantial number of reviews. For example, a place may have a glowing review, but if it’s the only review, that customer’s experience might not be the same as yours. Or worse, it could be a misleading review from an employee or business owner.
Yelp has an algorithm that helps it spot misleading reviews, but sometimes they can slip by undetected. That’s why it is important not to put too much stock in one review. Instead, see what patterns emerge after you’ve read numerous reviews. Look for reviews that are specific and give plenty of details about the users’ experiences.
Sometimes, the owner of an establishment will reply to a review. This response can either be a thank you to someone for a good review or a defense or apology if the review was a negative one. Either way, we consider a thoughtful reply a good sign — particularly in response to a negative review. It shows that the business cares about its reputation.