Topic
Indentation
About: Indentation is a research topic. Over the lifetime, 13002 publications have been published within this topic receiving 340476 citations.
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TL;DR: In this paper, the authors investigated the plastic deformation of two Pd and two Zr-based bulk metallic glasses (BMGs) through the use of nanoindentation, which probes mechanical properties at the length scale of shear bands.
628 citations
TL;DR: In this article, nineteen models and equations relating the degree of cracking to the fracture toughness are reviewed and then modified in a standard manner for both experimental convenience and direct comparison for both direct comparison.
Abstract: There is considerable interest in determining the fracture toughness of brittle materials by measuring the extent of cracking associated with a Vickers indentation because of the ease of specimen preparation and the simplicity of the test. However, confusion has been engendered by the multitude of models and equations in the literature relating the degree of cracking to the fracture toughness. In Part 1 of this work, nineteen of these equations are reviewed and then modified in a standard manner for both experimental convenience and direct comparison.MST/1050a
603 citations
Book•
01 Jan 2000
TL;DR: In this article, the authors present a depth-sensing Indentation Testing (DSIT) test for brittle fracture in brittle solids, which is based on the Hertzian Fracture.
Abstract: Mechanical Properties of Materials.- Linear Elastic Fracture Mechanics.- Delayed Fracture in Brittle Solids.- Statistics of Brittle Fracture.- Elastic Indentation Stress Fields.- Elastic Contact.- Hertzian Fracture.- Elastic-Plastic Indentation Stress Fields.- Hardness.- Elastic and Elastic-Plastic Contact.- Depth-Sensing Indentation Testing.- Indentation Test Methods.
577 citations
01 May 1945
TL;DR: In this paper, a discussion of the indentation of ductile materials by cylindrical punches with conical heads is given, where it is shown that the load rises towards a maximum value which is not approached until the base of the cone has travelled four to five diameters into the copper block.
Abstract: A discussion is given of the indentation of ductile materials by cylindrical punches with conical heads. On the experimental side, experiments have been made with work-hardened and with annealed copper, with penetrations up to nine times the diameter of the punch. It is found that the load rises towards a maximum value which is not approached until the base of the cone has travelled four to five diameters into the copper block. Denoting this maximum load by p0A, where A is the area of the cross-section of the punch, it is found that p0 for a lubricated punch is about twice the hardness, or five times the yield stress, of the work-hardened material. A theoretical method is given for calculating p0, as follows: the pressures pc and p8 required to enlarge a cylindrical and a spherical hole in a material showing any kind of strain hardening can be calculated. It is plausible to assume that p0 should be between pc and p8, and since p8 is only slightly greater than pc, an approximate theoretical estimate of p0 is obtained. This is in good agreement with experiment. In the light of these results a qualitative discussion is given of hardness testing, and it is shown both on experimental and on theoretical grounds that with lubricated cones and work-hardened materials the hardness, i.e. load/indentation area, will not depend much on the angle of the cone unless this is less than 10°.
576 citations
TL;DR: An efficient numerical algorithm is developed to compute all three material coefficients of cartilage in situ on the joint surface from the indentation creep experiment, and the average values of the aggregate modulus are determined.
561 citations