China
Africa
Explore chapters and articles related to this topic
Experimental methods
Published in Roderic S. Lakes, Viscoelastic Solids, 2017
A durometer is a device used to measure the stiffness of rubbery materials. The durometer has a flat surface which the user presses to the rubber specimen. A spring-loaded protruding probe causes an indentation in the rubber. The observer reads the value of the indentation from a dial gage, which reads from 0 to 100, linked to the probe. A spring within the durometer provides the indenting force exerted by the probe. If the rubber is viscoelastic, the dial reading changes with time after the durometer is pressed to the rubber specimen.
Basic Materials Engineering
Published in David A. Hansen, Robert B. Puyear, Materials Selection for Hydrocarbon and Chemical Plants, 2017
David A. Hansen, Robert B. Puyear
Hardness is measured according to ASTM D2240, “Test Method for Durometer Hardness,” and ASTM D1415, “Test Method for International Hardness.” The Durometer instrument measures the indentation depth when the instrument is pressed onto a flat surface of the elastomer. One instrument is used for soft materials (Shore Durometer A scale) and another for harder materials (Shore Durometer D scale). Figure 2-11 shows the relationship between the Durometer scales and the Rockwell R scale used for plastic materials.
Plastics Properties and Testing
Published in Manas Chanda, Plastics Technology Handbook, 2017
A durometer is an instrument for measuring hardness by pressing a needle-like indentor into the specimen. Operationally, a durometer resembles the Barcol tester in that the instrument is pressed onto the sample surface until it reaches a stop ring. This forces the indentor into the material, and a system of levers transforms the depth of penetration into a pointer movement on an indicating dial, which is calibrated from 0–100.
Experimental investigation of morphological and mechanical properties of SiC-neem-coir fiber reinforced hybrid composite
Published in Journal of the Chinese Institute of Engineers, 2022
R Pandiyarajan, Starvin M, Belsam Jeba Ananth M, Marimuthu S, Sabarish S, S Ponsuriyaprakash
Shore Durometer (Shore D) hardness scales possess different levels that measure material's resistance to indentation in a similar fashion to the hardness tests done for metals. The hardness gauge was similar to a pressure gauge with a circular dial, with a needle that comes into contact with the test surface, to apply pressure. When the set pressure was applied firmly, the needle penetrated the surface of the specimen as far as possible, and the subsequent readout in the gauge indicated the hardness measure of the specimen. In this study, for measuring the hardness of the composite material, Shore D hardness scale measurement was used because of its utility in representing the hardness values of hard rubbers, semirigid plastics and hard plastics (Srinivasa and Bharath 2011). The samples under this test in the present work were tested by following the ASTM D2240 standard.