ScienceDaily (Sep. 18, 2012) ? Objects created using 3-D printing have a common flaw: They are fragile and often fall apart or lose their shape.
"I have an entire zoo of broken 3-D printed objects in my office," said Bedrich Benes, an associate professor of computer graphics at Purdue University.
The printed fabrications often fail at points of high stress.
"You can go online, create something using a 3-D printer and pay $300, only to find that it isn't strong enough to survive shipping and arrives in more than one piece," said Radomir Mech, senior research manager from Adobe's Advanced Technology Labs.
The 3-D printers create shapes layer-by-layer out of various materials, including metals and plastic polymers. Whereas industry has used 3-D printing in rapid prototyping for about 15 years, recent innovations have made the technology practical for broader applications, he said.
"Now 3-D printing is everywhere," Benes said. "Imagine you are a hobbyist and you have a vintage train model. Parts are no longer being manufactured, but their specifications can be downloaded from the Internet and you can generate them using a 3-D printer."
The recent rise in 3-D printing popularity has been fueled by a boom in computer graphics and a dramatic reduction of the cost of 3-D printers, Benes said.
Researchers at Purdue and Adobe's Advanced Technology Labs have jointly developed a program that automatically imparts strength to objects before they are printed.
"It runs a structural analysis, finds the problematic part and then automatically picks one of the three possible solutions," Benes said.
Findings were detailed in a paper presented during the SIGGRAPH 2012 conference in August. Former Purdue doctoral student Ondrej Stava created the software application, which automatically strengthens objects either by increasing the thickness of key structural elements or by adding struts. The tool also uses a third option, reducing the stress on structural elements by hollowing out overweight elements.
"We not only make the objects structurally better, but we also make them much more inexpensive," Mech said. "We have demonstrated a weight and cost savings of 80 percent."
The new tool automatically identifies "grip positions" where a person is likely to grasp the object. A "lightweight structural analysis solver" analyzes the object using a mesh-based simulation. It requires less computing power than traditional finite-element modeling tools, which are used in high-precision work such as designing jet engine turbine blades.
"The 3-D printing doesn't have to be so precise, so we developed our own structural analysis program that doesn't pay significant attention to really high precision," Benes said.
The paper was authored by Stava, now a computer scientist at Adobe, doctoral student Juraj Vanek; Benes; Mech; and Nathan Carr, a principal scientist at Adobe's Advanced Technology Labs.
Future research may focus on better understanding how structural strength is influenced by the layered nature of 3-D-printed objects. The researchers may also expand their algorithms to include printed models that have moving parts.
Share this story on Facebook, Twitter, and Google:
Other social bookmarking and sharing tools:
Story Source:
The above story is reprinted from materials provided by Purdue University. The original article was written by Emil Venere.
Note: Materials may be edited for content and length. For further information, please contact the source cited above.
Note: If no author is given, the source is cited instead.
Disclaimer: Views expressed in this article do not necessarily reflect those of ScienceDaily or its staff.
Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/~3/wDACt1RxQjE/120918154428.htm
pineda john edwards heart condition mena suvari joyful noise one life to live jeff fisher van der sloot
Similar to the best health insurance policy for parents in India, there? s a huge pool of a number of guidelines for each necessity of every person. This facilitates the person to create informed choices concerning the exact type of medical health insurance plans into which she or dossier he really wants to enter. When the customers enjoy a healthy body status and don? t need to visit a physician too regularly, they ought to choose greater insurance deductibles. You will find many different types of guidelines you can decide on ( HMOs, PPOs, etc.), and amounts of coverage, which means you should have the ability to find something which gives you the policy you need and also at a cost you really can afford. You? ll health uncover its benefits inside a week of use of this hot product while you start to notice that you? ve a greater feeling of wellness. Get sufficient protein Protein is essential for the physiques to rebuild natural health dossier and repair broken in addition to aging body tissue. Therefore there? s no particular ? one- size- fits- all? type of a technique for individual medical health insurance health plans for that self- employed. Your healthy weight is not some type of miracle number. The scientists evaluated the kids socio- economic risks by searching in the children? s contact with crowding together, noise, housing conditions, reviews of family problems, contact with violence, and separation from family. This role not just guarantees the safety and health from the employees but kindred health additionally from the place of work, atmosphere and public. 1. Consequently, meals are not digested correctly, resulting in the development of sticky toxic material ( ama) within the small intestine. States Census Bureau report, ? Earnings, Poverty and Medical Health Insurance Coverage within the U . It offers necessary financial and medical security towards the traveler. You will find many cat medical health insurance plans. The task description from the health care professional would natural be to supervise the potency of the help provided, suggest improvement from the department, and supervise various departments for example medical department and correctly matching the paramedical services. Additionally, it supplies a grounds kindred for advancing to postgraduate study. Request your loved ones, what medical service do you want? Health Advantages: Sardines are thought as brain food since the omega- 3 essential fatty acids in sardines are essential for that brain memory and gratifaction. Health care isn? t any exception for this process. Otherwise, you? ll be having to pay heavily for just one feature when you lose out on essential features that other fitness centers in your town offer. As the rules regarding medical health insurance is going to be natural health dossier altering within the next few years, everybody still will need an insurance policy on their own. 2. Periodontal disease periodontal disease is extremely common in dogs and may become serious. Dark wine shouldn? t be prohibited due to its alcohol content, and the quantity of benefits that you could really provide to some is amazingly significant in present day existence. Because home health costs challenge most family budgets, most home health agencies desire certification as Content management systems- approved companies. 1. Straight forward: Among the greatest benefits of researching health insurance plans on the internet is that certain doesn? t suffer from insurance agents. regulation that provides patients greater access to their personal medical records and much more treatments for how their private health details are used. But it gets better, the main acidity inside it is known as lauric acidity ? exactly like that in human breast milk, which will help us defend against intrusive infections and bacteria. 
Display Full Page
As one of Facebook's very earliest backers (
Posted by eri39070de on 10 hours ago 
Display Full Page
