DEC 2018


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NEWS 21 Measuring inside bondlines structures." AvPro's material state control, however, is a signicant change, which is one reason why its adoption has been slow. "e aerospace composites community is very conservative," notes Lou Dorworth, longtime instructor at Abaris Training. "Using AvPro's Material State Management system has required training and, initially, the units were not as user friendly as those being developed with ermoPulse." Rose acknowledges that the goal of current development is to have a commercial product that is easy to use. "We are also rening the software and scaling the wire and sensor manufacturing for industrial production. Currently, we are projecting a cost of $25-$30 for each sensor, which is roughly the same price as a thermocouple." "Our rst priority is to get the technology nalized for commercialization and industrial production," says Rose. He adds that AvPro will next move forward with establishing an ASTM test method; the nal step will be to conduct whatever additional testing is required for structural certication (i.e., e"ects of defects programs). "Getting equivalent results with and without the sensor bonded in is a good start," says Rose, "but structures engineers have to be convinced that the sensors can be placed at critical locations and improve their ability to achieve properties, without Read this article online | creating a defect." His goal is to pursue an initial qualication of the ermoPulse system at an all-composite light sport aircraft (LSA) or personal jet manufacturer, which tend to have a —atter corporate structure than OEMs and large Tier suppliers. ough change in composites aerostructures design and production is notoriously expensive and slow, there is more impetus now than ever to implement process control technologies that can accelerate the pace of composites manufacturing. Rose and Dorworth see the potential not only for aircraft manufacturing and repair, but for much wider applications such as managing temperature-dependent processes based on real-time, in-situ data. "Our system is giving the parts manufacturer the power to optimize its own cure cycles and correlate those to actual material properties," says Rose. "We now have the ability to measure temperature and viscosity as a function of time in the part and bondline. at gives us the ability to truly establish digital control and have documented condence in the quality of our parts." CW senior editor Ginger Gardiner has an engineering/ma- terials background and more than 20 years of experience in the composites industry.

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