Parcourir par auteur "Zisis, T."
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The adhesive contact of a flat punch on a hyperelastic substrate subject to a pull-out force or a bending moment
Zisis, T.; Zafiropoulou, V. I.; Giannakopoulos, A. E. (2011)In the last decade; instrumented macro- and nano-indentation tests have become useful tools for probing mechanical properties of materials. In this context, little in-depth work has been done for soft bio-materials like ... -
Analysis of Knoop indentation
Giannakopoulos, A. E.; Zisis, T. (2011)Knoop indentation tests have long been a standard method for material characterization due to the fact that they provide an easy inexpensive non destructive and objective method of evaluating basic properties from small ... -
Analysis of Knoop indentation of cohesive frictional materials
Giannakopoulos, A. E.; Zisis, T. (2013)During the last decades, pyramid micro and nano-indentation tests such as Vickers, Berkovich and Knoop have been used on cohesive-frictional (pressure sensitive) materials, such as hard metals, glasses and ceramics, and ... -
Analysis of Knoop indentation strain hardening effects
Zisis, T.; Giannakopoulos, A. E. (2011)Knoop indentation tests are a standard method for material characterization due to the fact that they provide an easy, inexpensive non-destructive and objective method of evaluating basic properties from small volumes of ... -
Development of Strong Surfaces Using Functionally Graded Composites Inspired by Natural Teeth-A Theoretical Approach
Giannakopoulos, A. E.; Kordolemis, A.; Zisis, T. (2010)In recent years functionally-graded composites have been proposed to develop strong surfaces that can withstand high contact and frictional forces. The present work presents a new graded composite that can be used for the ... -
Development of Strong Surfaces Using Functionally Graded Composites Inspired by Natural Teeth-Finite Element and Experimental Verification
Zisis, T.; Kordolemis, A.; Giannakopoulos, A. E. (2010)Functionally graded materials (FGMs) are composite materials that exhibit a microstructure that varies locally in order to achieve a specific type of local material properties distribution. In recent years, FGMs appear to ... -
The elastic-plastic indentation response of a columnar thermal barrier coating
Zisis, T.; Fleck, N. A. (2010)Thermal barrier coatings with a columnar microstructure are prone to erosion damage by a mechanism of surface cracking upon impact by small foreign particles. In order to explore this erosion mechanism, the elastic indentation ... -
Evaluation of material properties of incompressible hyperelastic materials based on instrumented indentation of an equal-biaxial prestretched substrate
Zisis, T.; Zafiropoulou, V. I.; Giannakopoulos, A. E. (2015)It is well known that instrumented indentation tests are useful tools in probing mechanical properties of materials such as metals and ceramics. Instrumented indentation of hyperelastic materials such as rubbers, bio-materials, ... -
Some basic contact problems in couple stress elasticity
Zisis, T.; Gourgiotis, P. A.; Baxevanakis, K. P.; Georgiadis, H. G. (2014)Indentation tests have long been a standard method for material characterization due to the fact that they provide an easy, inexpensive, non-destructive and objective method of evaluating basic properties from small volumes ... -
Wedge indentation of elastic-plastic layered substrates: Designing against contact-induced plasticity
Zisis, T.; Giannakopoulos, A. E. (2009)The present paper investigates the indentation of plastically graded substrates by wedge indenters. Substrates made of graded materials are often encountered in nature or are artificially produced. The variation of the ...