Forty-five percent of serious plastics product failures result from inappropriate materials selection, said Melissa Kurtz, senior materials scientist at Stork Technimet Inc. in a lively discussion on failure analysis at the annual technical conference of the Society of Plastics Engineers in Milwaukee, WI. “This is especially true in applications involving chemical attack and environmental stress cracking,” she said. In one example she cited a phthalic-based plasticizer used in a rubber seal caused environmental stress cracking of polyetherimide in a medical device. In a panel discussion, a General Motors engineer asked for tips on how to determine if excessive use of captive regrind could be causing a part failure. Experts suggested testing melt index of material before molding to determine if the molecular weight was out of range.
How can automakers, aerospace contractors, and other OEMs get new metal alloys that are stronger, harder, and can survive ever higher temperatures? One way is to redesign their crystalline structures at the nanoscale and microscale.
Although a lot of the excitement about 3D printing and additive manufacturing surrounds its ability to make end-products and functional prototypes, some often ignored applications are the big improvements that can come by using it for tooling, jigs, and fixtures.
A fun and informative tour you can attend at the upcoming Design & Manufacturing Minneapolis, MD&M Minneapolis, and other events there, is the Materials Innovation Tour on Wednesday afternoon. I'll be leading it.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies.
You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived.
So if you can't attend live, attend at your convenience.