System and method for testing true stress and true strain
Abstract
A true stress testing system broadly comprising a force input machine, an imaging system, and a computer. The imaging system includes a light source for projecting a light beam at the specimen in a first direction and a camera positioned on an opposite side of the specimen for receiving portions of the light beam not blocked by the specimen such that a shadow image of the specimen is created via the camera. The computer may determine a minimum dimension of the specimen perpendicular to the first direction at a point in time over a plurality of points along the force axis via the shadow image of the specimen such that the processor accounts for changes in position of the minimum dimension along the specimen. A true stress of the specimen may then be determined according to the minimum dimension of the specimen perpendicular to the first direction at the point in time.
- Inventors:
- Issue Date:
- Research Org.:
- Kansas City Plant (KCP), Kansas City, MO (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1735236
- Patent Number(s):
- 10768082
- Application Number:
- 16/404,918
- Assignee:
- Honeywell Federal Manufacturing & Technologies, LLC (Kansas City, MO)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01L - MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
G - PHYSICS G01 - MEASURING G01M - TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES
- DOE Contract Number:
- NA0000622
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 05/07/2019
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING
Citation Formats
Wenski, Edward G. System and method for testing true stress and true strain. United States: N. p., 2020.
Web.
Wenski, Edward G. System and method for testing true stress and true strain. United States.
Wenski, Edward G. Tue .
"System and method for testing true stress and true strain". United States. https://www.osti.gov/servlets/purl/1735236.
@article{osti_1735236,
title = {System and method for testing true stress and true strain},
author = {Wenski, Edward G.},
abstractNote = {A true stress testing system broadly comprising a force input machine, an imaging system, and a computer. The imaging system includes a light source for projecting a light beam at the specimen in a first direction and a camera positioned on an opposite side of the specimen for receiving portions of the light beam not blocked by the specimen such that a shadow image of the specimen is created via the camera. The computer may determine a minimum dimension of the specimen perpendicular to the first direction at a point in time over a plurality of points along the force axis via the shadow image of the specimen such that the processor accounts for changes in position of the minimum dimension along the specimen. A true stress of the specimen may then be determined according to the minimum dimension of the specimen perpendicular to the first direction at the point in time.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 08 00:00:00 EDT 2020},
month = {Tue Sep 08 00:00:00 EDT 2020}
}
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