Monday, November 28, 2016

Laser Solutions to the Transport and Aerospace Industry

With mounting pressure to speed production, advanced polymer thermoplastic composites are rapidly gaining acceptance amongst both the automotive and aerospace industries. These polymer materials are strong and lightweight, making them ideal for reducing weight and meeting stricter fuel efficiency and crashworthiness regulations. However, the inhomogeneous nature of composite materials is far from ideal for ablative lasers.

For example, polymer composites, by their nature, contain a variety of materials with at least one reinforcement material and at least one matrix which supports the reinforcement material. The mismatch between the conductivity of carbon fiber-reinforced polymer and the epoxy matrix makes traditional laser cutting nearly impossible. Epoxies are a type of thermoset polymer.

The challenge for laser processing involves the fact that each component has its own unique physical properties which are also highly anisotropic. Imagine a composite with two or three different melting points and how that might affect a traditional laser. These incompatibilities render traditional lasers ineffective for polymer composites.

Though challenging for the laser industry, solutions are emerging. Here's a brief overview of some of the new technologies and processes recently discussed in an article featured in Industrial Laser Solutions for Manufacturing.

Laser Solutions to Polymer Composite Challenges

Fiber Lasers - Fibers are commonly used as reinforcements due to their high surface-area-to-volume ratio and strength. Fiber lasers are emerging as the leading choice for composite processing. With a fiber laser, the beam is generated inside the fiber. With the light inside the fiber, the beam can easily and precisely be focused. Fiber lasers have the highest focusability and high average power, near infrared properties, making them suitable for cutting and welding of both metal and composite polymer materials.

Using Lasers to Improve Adhesive Bond Strength - The auto and aerospace industries also use lasers and other composite processes to improve adhesive bond strength. For example, lasers are now used to clean composite surfaces before applying adhesive bonds. Lasers eliminate the need for preparing materials for bonding with chemical or mechanical abrasion.

Localized Repair - One of the problems with composites involves localized damage. Lasers are starting to be used to repair this damage using ablation and adhesive injections. Localized repair is an emerging technique that is still being explored.

Laser Welding - According to Coherent, joining composite materials requires different approaches than when joining metal materials due to it the composite material's properties. For example, riveting can weaken or damage the composite material as discussed earlier. Laser welding becomes possible when at least one of the welding partners has a thermoplastic resin and one partner is transmissive to radiation. If the CFRP partner is a thermoset, it must be pre-processed prior to laser welding. This involves laser ablating of the reis to reveal the fiber structure. While the open fiber structure improves shear strength, it also affects absorption. Coherent recommends keeping the welding temperature constant with a pyrometer to improve weld quality.

Wednesday, November 9, 2016

Remarkable Website - How Technology Will Help You Get There

Got a product to distribute or sell? Or want to have a portfolio on your work? Or want to compile some valuable information that would come to others' use? In all these cases a website would be a good solution. You don't have to start everything from scratch. Weebly/Wix technology will help you rather easily to reach there. Read on to find out.

Weebly/Wix is free to use and you can have a subdomain of the main domain to publish your site.

It has text boxes and spacers which you can drag and drop.

You can use varying font colors, types and sizes inside these text boxes. You can drag and drop files and image objects from the left column and click on them to upload the required files or images from your PC.

You can use contact forms to embed your email address and on publishing the site, people can message and those messages will land directly in your email account. You can also take advantage of small text boxes and put your own titles on them other than built-in titles such as, "Last Name"

You have the capacity to embed web links inside a group of words. On publishing the site, clicking that group of words will help you to get to the required website.

The website layout can be of varying types for Weebly/Wix technology. For the most convenient sake, I give you an example for that of a writer. The layout can comprise of the following menu bar:

Home Free Resources Books About Blogs Contact

Under Home menu item you should address what the website is about and who it is for.

Under Free Resources, you can have book images and links to free books, courses or any other free material relevant to a writer's website all via an opt-in page to collect email addresses of those who subscribe to the free resources.

Under Books menu item, you compile your books for sale along with other information such as ISBN, book title, book image, previews, co-authors, if any and access links to the books either in digital or hardcopy form after a specific buyer makes the purchase online. Of course hardcopy ones will be shipped to the given address information.

Under About menu item, you write all your information as an author- your BIO, how many books you have authored and in what category as well as New York Times bestselling books, if any. Explain briefly the layout of the website as well here.

Under Blogs menu item, you can use weebly's blog option or put links to blogs for example, that of blogspot.com that you maintain separately. In these blogs you can discuss press releases and short descriptions of your books, publicizing them.

Lastly, Contact menu item can come in the main menu bar. It should be a form asking for the interested party's first name, last name, email and comments. On clicking submit button of the contact form, their information should reach straight to your email account that you embedded in previously as I explained before.

These are some of the ways you can create a beautiful website with Weebly/Wix technology for free. You can add a template cover for your site at the start and you have the option of changing it.

With all the above in place, it's time to publish your website. You will be asked for a subdomain. For instance, if author Smith wants to publish this site, he can use smith-author.weebly.com (a fictitious one; just for the purpose of an example) if it is available otherwise he may need to modify it a little to get an available one.

This is exactly how modern technology will enable you to create a remarkable website without starting from scratch. You also have the option to purchase a main domain so that Weebly or Wix wouldn't appear in the URL.

But you will have to be careful of the instructions for instance, you may have to renew the site after every two or five years with necessary payments.