Because I just learned how to add the (™) I feel compelled to trademark something. Seems the industry likes to throw around the term "monocoque" quite a bit so I'm going to mix it up. At Pursuit we employ Tricoque™ technology. That's two better than monocoque. I kid, but in all seriousness we do build our front triangles in three pieces and here is an explanation to why.
It has been a while, but don’t worry, my students have been giving me plenty of blank stares in the meantime. Seriously, I am teaching a course this semester called Design of Machine Elements which I consider a key opportunity for students to bridge their engineering knowledge toward their upcoming professional career. Given the course is an elective, I have opted to not give exams, but instead assign regular engineering project problems. We discuss fasteners, bonding, shafts, gears, springs, etc. and discuss critical implications of fit, tolerancing, and perhaps most importantly the different means of engineering communication. At the heart of every single problem, are load and deformation analyses. These analyses are much easier for well characterized, isotropic materials (e.g. steel, aluminum, cast iron), but become much more intensive as we change to a highly engineered, anisotropic material such as a carbon fiber reinforced epoxy.
If you’re a bike geek, you probably keep up with all the latest and greatest bikes. Do you remember when they were all made by old craftsman in dusty old shops in Europe. DeRosa, Basso, Guerciotti, etc. At the time road bikes were steel and with the exception of some fillet brazed frames they were primarily made of lugged construction.
Topics: Made in Bozeman
When I was asked several years ago by a friend if I wanted to join him on a cycling trip to France with a group of his friends I didn’t have to think very hard about the decision. Bicycles are connectors. They connect us with our world in a more complete way than our cars, they connect us to each other, and they connect us to the inner child we often lose touch with. Now I try to return to France every year to ride, and immerse myself in the food, culture, history, and scenery that is on offer there. It’s a time to connect with old friends, disconnect from the day to day, and re-awaken a long term love affair withthe bike...
For those of you that have been following our progress I thought I’d bring you up to speed at what has gone on since our last update.
My name is Kyle and I am the guy that spends the most time with Carl building here at Pursuit Cycles. Head on over to my bio page to read a little more about me and my materials science background. In today’s post we will be covering the thing that makes up the majority of your bike. Carbon fiber. Around 60% by volume, epoxy, the remainder is something that we will talk about in the next blog post. After the epoxy post I will be writing the last of this 4 part series on potential new material technology in bicycles. But, in this post I will focus on the nuances of selecting carbon fiber for frame design.
Advanced Bike Tech
Carbon fiber frames are lightweight, but how light is too light? It requires a lot of engineering to make sure your frame is light and strong.
We were hoping we'd be showing you all sorts of awesomeness by now, but I guess we were a little too confident. We knew things would take longer than planned and tried to be conservative, but even our conservative estimates were a little optimistic.
I’m going to do a little 4 part mini-series on carbon fiber materials. In this first article we’ll cover where the actual individual fibers come from and in following articles we’ll discuss types of fibers; their characteristics, strengths and weakness. Then we’ll go over the epoxies(matrix) and finally we’ll discuss commercially available products that are commonly used in high-end carbon frames. For a deeper dive into how carbon fiber actually works, check out Jared’s series on anisotropy.