Development and optimization of hybridized glass/carbon Lft composites for cost and performance

Conference Dates

November 10-14, 2019


Long glass fiber has been in the industry for many years in a variety of applications ranging from nonstructural initially, to semi-structural now. However, the sticking point in this is that in many of these applications performance requirements aren’t being reached by the glass fibers where they’re either not strong enough, stiff enough, or some subset of the above. Thus, more performance is needed for those applications. A lot of the times this scenario leads to the question why not go to carbon fiber? Many industries like aerospace and sporting goods go this route because carbon fiber is lightweight and has much higher stiffness and strength than glass fibers. In many cases that stiffness and strength is too great. It’s more than the application requires, but there’s really not a material system that can bridge the gap between the performance criteria. This results in over designing the component. That’s one negative. Another is, it’s very expensive. This really summarizes the problem. Figure 1 shows the “G-LFT landscape” that gives a survey of materials, readily available on the web, where the various properties were combined to create this bubble plot. Between the properties of glass reinforced and carbon reinforced composites is a large gap in performance. If an application requires performance here, in order for it to use a composite solution you have to go up to carbon fiber, which again, is cost prohibitive. And you can’t go to glass fiber because it won’t meet the performance needs. A new question arises: why can’t we hybridize the two and form a bridge from the glass fiber reinforcement performance to the carbon fiber reinforced plastics performance? For this particular scenario were looking at G-LFT but this approach could be applied to other material systems. In the case of G-LFT the question arises, can we develop a tailored product for a given application and maximize the cost and performance ratio and make it economically justifiable. Thus, the overall idea: bridge the gap with a glass/carbon hybrid G-LFT.

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