Indentation of freestanding pre-stressed films: extracting elastic modulus and pre-tension, elucidating finite-sized indenter effect

International Journal of Mechanical Sciences, Journal Year: 2025, Volume and Issue: unknown, P. 110141 - 110141

Published: March 1, 2025

Language: Английский

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Indentation of Freestanding Pre-Stressed Films: Extracting Elastic Modulus and Pre-Tension, Elucidating Finite-Sized Indenter Effect

Published: Jan. 1, 2025

The indentation test is an important method for characterizing the mechanical properties of solid films. However, how to extract elastic modulus pre-stressed circular films through still debatable due transition between linear membrane, nonlinear and plate behavior. This study proposes a extracting pre-tension freestanding film simultaneously by integrating theoretical modeling. Firstly, we introduce experimental setting results polydimethylsiloxane (PDMS) model cylindrical then presented, considering combined contribution pre-tension, additional stretching, bending stiffness response. asymptotic derived from full governing equations are compared with classical solutions in regimes verify After that, extracted iteratively solving until difference numerical load-deflection curves minimized. Finally, explicit force-depth formula finite-sized indenter proposed. underlying mechanism synergistic effect stretching on behavior region elucidated small indenters.

Language: Английский

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Peeling from elastomeric layers: Does material compressibility matter?

International Journal of Mechanical Sciences, Journal Year: 2025, Volume and Issue: unknown, P. 110331 - 110331

Published: May 1, 2025

Language: Английский

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Identification of stress-strain curves with yield plateau using indentation

International Journal of Mechanical Sciences, Journal Year: 2025, Volume and Issue: 299, P. 110395 - 110395

Published: May 18, 2025

Language: Английский

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