Method of providing representation of aging of material
OwnerFriedbert Gadduminventor
Life of this patent
Estimating the term…
Abstract
Specimens are subjected to dislocation (tensile extension, compression, torsion) in discontinuous steps in which load and no-load conditions alter during work cycles, interspaced by recovery periods. The length of each work cycle is determined to be much shorter than required for a dynamic equilibrium state. The recovery periods may be terminated in closed loop operation. The reaction force peaks at the beginning and the end of each work cycle, the force differential in beginning and end of each load cycle phase, and the force level resulting from a low level displacement bias during recovery are parameters indicating aging and other properties. Artificial aging may continue throughout.
Claims6
Method of determining and measuring aging and/or age-dependent properties of a specimen comprising the following steps:
- first, subjecting the specimen to alternating mechanical load-no-load conditions for a period during which the maximum reaction force effective during sequential load phases still declines;
- second interrupting the first mentioned step for a period longer than a period needed for about 70% to 80% recovery of the specimen, the recovery being or would be completed when, following a load change, the reaction force has again reached a constant level;
- repeating the first and second steps in cyclic fashion;
- and
- measuring the reaction force on the specimen.
Dependencies are inferred from the claim text.