Defining Allowable Physical Property Variations for High Accurate Measurements on Polymer Parts.

Ali Mohammadi, Mads Rostgaard Sonne, Daniel González Madruga, Leonardo De Chiffre, Jesper Henri Hattel

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

237 Downloads (Pure)

Abstract

Measurement conditions and material properties have a significant impact on the dimensions of a part, especially for polymers parts. Temperature variation causes part deformations that increase the uncertainty of the measurement process. Current industrial tolerances of a few micrometres demand high accurate measurements in non-controlled ambient. Most of polymer parts are manufactured by injection moulding and their inspection is carried out after stabilization, around 200 hours. The overall goal of this work is to reach ±5μm in uncertainty measurements a polymer products which is a challenge in today‘s production and metrology environments. The residual deformations in polymer products at room temperature after injection molding are important when micrometer accuracy needs to be achieved. Numerical modelling can give a valuable insight to what is happening in the polymer during cooling down after injection molding. In order to obtain accurate simulations, accurate inputs to the model are crucial. In reality however, the material and physical properties will have some variations. Although these variations may be small, they can act as a source of uncertainty for the measurement. In this paper, we investigated how big the variation in material and physical properties are allowed in order to reach the 5 μm target on the uncertainty.
Original languageEnglish
Title of host publicationAIP Conference Proceedings
Number of pages5
Volume1738
PublisherAIP Publishing LLC
Publication date2015
ISBN (Print)978-0-7354-1392-4
DOIs
Publication statusPublished - 2015
Event13th International Conference of Numerical Analysis and Applied Mathematics 2015 (ICNAAM 2015) - Rhodes, Greece
Duration: 22 Sep 201528 Sep 2015
http://icnaam.org/

Conference

Conference13th International Conference of Numerical Analysis and Applied Mathematics 2015 (ICNAAM 2015)
LocationRhodes,
CountryGreece
Period22/09/201528/09/2015
Internet address
SeriesA I P Conference Proceedings Series
Volume1738
ISSN0094-243X

Keywords

  • Finite Element Analysis
  • Thermo-mechanical Model
  • Uncertainty Budgeting

Cite this

Mohammadi, A., Sonne, M. R., Madruga, D. G., De Chiffre, L., & Hattel, J. H. (2015). Defining Allowable Physical Property Variations for High Accurate Measurements on Polymer Parts. In AIP Conference Proceedings (Vol. 1738). AIP Publishing LLC. A I P Conference Proceedings Series, Vol.. 1738 https://doi.org/10.1063/1.4951804