This week we were given most of our requested printing. We had asked for four cylinders, but received only two. We tested a normal bone and a hollow cylinder to give us healthy moduli. After these initial tests, we began to investigate exactly how acetone affects the bones. This was met with some initial difficulties, as acetone dissolves most plastic containers. Finally, we figured out that the Biomed Kitchen five floors up had paper cups which could hold the acetone. Armed with containers capable of holding acetone, we were able to begin our degradations. We broke the second hollow cylinder to give us four halves, and treated three with acetone. The first bone, we submerged in 100% acetone for 15 seconds, the second for 30 seconds, and the third was submerged twice for thirty seconds each time. The bones became very gooey until the acetone dried, and the models seemed significantly weakened even after just 15 seconds. The data obtained from these four tests will help us estimate the effects on the moduli of the bones when they are treated with acetone.
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| Materials printed: three normal bones (left), two capped hollow cylinders (bottom), & three modified bones (right). |
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| Three point flexural test of test cylinder |
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| Three point flexural test of healthy bone |
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| Broken parts after the tests |
