Deformations and strain energy in fragments of tempered glass: experimental and numerical investigation

Jens Henrik Nielsen*, Marie Bjarrum

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The present paper is adding to the current knowledge by experimentally investigating the change of strain in a fragment of tempered glass. This is done by comparing the surface shape before and after fracture. The present work also aims at validating a FE-model for estimating the remaining strain energy and thereby the stress in a fragment post failure. The FE-model have been established in previous work Nielsen (Glass Struct Eng, 2016. doi: 10.1007/s40940-016-0036-z) and is applied here on the specific geometry and initial state of the investigated fragments. This is done by measuring the residual stresses using a Scattered Light Polariscope before failure and thereby determining the initial stress state. The Geometry of the investigated fragment is found by means of a 3D scan. The surface topology of the fragment is found by letting a stylus traverse the surface and recording the shape. These information are then used for setting up a FE-model for calculating the stresses and strains left in the fragment after failure and compare the deformation to the measured.
Original languageEnglish
JournalGlass Structures & Engineering
Volume2
Issue number2
Pages (from-to)133-146
ISSN2363-5142
DOIs
Publication statusPublished - 2017

Keywords

  • Tempered glass
  • Thermally toughened glass
  • Fragments
  • Deformation of fragments
  • Residual stress

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