It is interesting to note that the rating of material resistance to selected shapes of indentors changes with load increase.
There is a significant difference in torsional resistance created by the different shapes of the indentors.
Indentors of cone, sphere and flat sphere shapes were loaded at axial force into a representative rubber material (NR with sulfur cure system and carbon black fillers) and turned 200[degrees] against it at room temperature (RT).
The use of bone indentors permitted the creation of denticulations or serrations that further enhanced the lacerating potential.
Flakes become trapped in the Melaleuca bark cushion and can cut the hand holding the indentor.
He grasps the indentor across the palm of his other hand, with the tip emerging below the little finger.
The difference in these hardness results was due to the difference in indentor geometry for these hardness tests.
However, it has been found that the indentor geometry has direct influence on the type of damage mode during scratching (1).
Indeed, using two different conical indentors with a spherical tip, they have recorded the critical load as a function of scratch speed.
As shown in Figure 18, the material undergoes compression stresses in front of the indentor, and is then submitted to tensile stresses when in the back of the contact.
PGPC 2010 had a very broad representation of senior industry speakers and participants from all segments of the plastics industry, including upstream energy and petrochemical producers, resin distributors, downstream processors, traders and indentors
2002); expressions of ethnic/group identity; expressions of individual skill and style; size and availability of glass preforms; and metal indentors
for pressure flaking.
Indentation by nominally flat or conical indentors
with rounded corners, International Journal of Solids and Structures 36: 4149-4181.
Units with pen-sized handheld indentors composed of an ultrasound transducer and a load cell have been developed that improve portability [4,6,8,11].
Direction and indentation speed can be computer-controlled with quick replacements of indentors.