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Showing 1 to 10 of 10 for “"Spherical indentation"”.
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Spherical indentation of magnetostrictive materials
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1999.
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Methodology to determine post yield material mechanical properties from spherical indentation
… material stress-strain curve based on spherical indentation is studied. Spherical-indentation process is analyzed by finite element (FE) method and a systematic analysis of relationships between indentation parameters and true stress/plastic-strain (sigmat- epsilonp) curve is performed …
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Single-crystal plasticity at finite strains: a computational investigation of hardening relations
… two different model problems are examined: A spherical indentation problem and a three dimensional shear problem. For both problems, the numerical code is run with the three hardening rules. For each hardening rule three types of crystal are examined: A crystal with only one slip system, a …
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Instrumented Nanoindentation Studies Of Deformation In Shape Memory Alloys
… and the composition of the alloy. Instrumented indentation, inherently a mechanical characterization technique for small sampling volumes, offers a cost effective means of empirically testing SMAs in the form of centimeter scaled buttons prior to large-scale production. Additionally, it is an …
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Multiscale In-Situ Characterization of Crystal Orientation, Temperature, and Microstructure Effects on Creep Defromation of Pure Magnesium and Mg-Al-RE Alloys
… in pure Mg and AE44 alloys. Novel in-situ nanoindentation creep methods were developed using an indenter inside a SEM. Additional techniques included in-situ tensile creep testing, scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and crystal plasticity finite element …
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Mechanical response of polymer matrix composites using indentation stress-strain protocols
… To address this need, the use of instrumented indentation on a lengthscale appropriate to the material system presents itself as a viable solution. Indentation is uniquely suited to such an implementation due to its inherent ability to conform to the lengthscale of testing needed and its high …
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Deformation behaviour of bitumen and bituminous mixes
… are presented with good agreement. The spherical indentation behaviour of bitumen under monotonic and cyclic loading conditions is studied in chapter 4. A simple extension to the power-law indentation model of Bower et al. (1993) is proposed for bitumen with good agreement with …
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Development of a novel cell traction force transducer based on cholesteryl ester liquid crystals. Characterisation, quantification and evaluation of a cholesteryl ester liquid crystal based single cell force transducer system.
… atomic force microscopy (AFM) based nano-indentation, spherical indentation, and micro-tensile tests. The interactions of LLC with cells were studied by using cell viability studies, cytochemical treatments, widefield surface plasmon resonance (WSPR) microscopy and various immuno-staining …
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Adaptation Of The Biodent For Spherical Microindentation To Determine Elastic Modulus In Small Rodent Bones
… the progression of bone-related diseases. Microindentation has become a widely used method for evaluating tissue mechanical properties of bone, as it samples the contributions of microarchitecture and composition. Microindentation using a standard pointed tip inherently introduces both elastic …
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High throughput prototyping and multiscale indentation characterization of metallic alloys
… compression, micro- bending, and nanoindentation. Among these, spherical nanoindentation is the most efficient and most reliable one. This high throughput mechanical protocol is capable of capturing local mechanical responses at different length scales in polycrystalline metals in the …