Additive manufacturing is a novel manufacturing technique, which has developed rapidly in recent years. The additive manufacturing process produces complex geometries, light weighted components and reduces the material waste. During the building process, a laser energy source is commonly used to melt the metal powder. Due to the presence of thermal gradients, residual stresses resides in the final product. These residual stresses, when released, result in a distortion of the product. To predict the appearing residual stresses and distortions, simulation tools can be used and prevent costly trials of failed printed products. This thesis investigates whether a good prediction of residual stresses and distortions can be performed in additively manufactured components using MSC Simufact. The inherent strain method was used to predict the residual stresses and distortions of a cantilever beam respectively a pipe. The printed components were then compared with the simulations. The residual stresses were examined using a X-ray di↵ractometer and the distortions were analyzed by a laser scanner.Results showed that the predicted distortions of the pipe correlated well with the simulations. However, the residual stresses were dicult to compare with the simulations. The conclusion that Simufact Additive can predict distortions can thus be drawn.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:kth-232518 |
| Date | January 2018 |
| Creators | Jonsson, Sonja, Krappedal, Sebastian |
| Publisher | KTH, Hållfasthetslära (Avd.) |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | TRITA-SCI-GRU ; 273 |
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