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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    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
    Issue number2
    Pages (from-to)133-146
    Publication statusPublished - 2017


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


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