29. Adımdaki Değişiklikler
Düzenleyen: Anthony Kouttron —
Düzenleme onaylandı tarafından Anthony Kouttron
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| - | [* black] What are reasonable material characteristics for the end cap then? 20-30% recycled plastic seems to be the norm for companies who make efforts to implement recycled materials. |
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| - | [* black] Here are my estimated material properties for the end cap: |
| + | [* black] Time to determine reasonable material characteristics for the end cap. 20-30% recycled plastic seems to be the norm for companies who make efforts to implement recycled materials so a 30:70 ratio of recycledPC:ABS seems like a decent conclusion based on these criteria. |
| + | [* black] Using data from fusion 360, solidworks, the first research [https://web.statler.wvu.edu/~rliang/paper688.pdf|pdf], this [http://www.rpplusm.com/assets/pc-abs---11-2.pdf|stratasys pdf], and another research [http://file.scirp.org/pdf/MSA20110500013_53100492.pdf|article], I was able to roughly estimate material properties for this end cap. |
| + | [* black] These are the values I used under simulation: Young's Modulus: 2.6 GPa, Poisson's Ratio: 0.40, Shear Modulus: 1000MPa, Density: 1.1/cm^3, Yield Strength: 44.58 MPa, Tensile Strength: 46MPa |
| + | [* black] Young's modulus, Poisson's ratio and the density were largely the same between different sources for PC:ABS. The yield strength was used from table 1 in the first research pdf to match the 30:70 blend. The tensile strength was estimated to be 46MPa as the tensile strength of similar material concentrations was slightly higher than Yield. |
| [* black] Remember, these numbers are not absolute. There are many different variations of PC-ABS and there do not seem to be any standardized set of blends to follow. There are also batch-to-batch variations in the properties of recycled polymers because of variability in the source and the composition of recycled material streams. | |
| [* black] Besides this, modifiers can be added to the PC:ABS blend to add desired mechanical qualities to the resulting material or help in binding. |