Intrinsic Errors on Sheet Strain Measurement Based on A Printed Square Grid  

Oleh:

Bruneel, Herman C. J.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Journal of Manufacturing Science and Engineering vol. 122 no. 4 (Nov. 2000), page 760-765.
Topik: MEASUREMENTS; intrinsic error; sheet strain measurement; printed square grid

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ93.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

The paper studies the intrinsic errors on strain measurements induced by the application of an electrochemical etched square grid through serigraphy. Systematic periodic strains are observed when the etched grid is directly measured before any mechanical deformation. These apparent, non-zero strains are the errors induced by the imperfection of the applied grid. They determine the limiting precision of the measuring process. The errors are due to interference between the periodic square grid and an underlying periodic structure, the dot structure of the printer used for the original drawing of the grid or the periodic pitch of the serigraphic tissue and even both. Although they are small, they can suggest an unstable deformation, even at large strains.

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