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Class 73/799 - Specimen cracking or crack propagation


Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein the loading causes formation of a
No. of patents: 197
Last issue date: 02/07/2012


1          
NumberTitleIssue Date
8109150Crack-propagation prediction method and program
The precision of crack-propagation prediction is improved by taking into consideration a variation in the error due to inspectors and inspection methods. There is provided a crack-propagation prediction method including a correlation-information preparing step of me...
02/07/2012
8042405Method and apparatus for characterizing microscale formability of thin sheet materials
A method of predicting sheet formability at a microscale level includes the steps of providing a grid pattern on a test sheet, bulging the test sheet to a hemispherical shape until a crack is initiated on the surface of the test sheet, detecting the initiation of th...
10/25/2011
7975557Multiple testing system and testing method
A multiple testing system has plural testing units which are disposed independently, and a single information processing device. The testing unit has a frame, a loading mechanism supported at the frame and applying a desired load quantity on a test body, and a detec...
07/12/2011
7938016Multiple layer strain gauge
An apparatus and method uses a die having at least one perimeter side with multiple pads. A structure is positioned between the at least one perimeter side and the multiple pads having multiple layers within the die. The structure functions as both a strain gauge an...
05/10/2011
7712375Strength measuring method of honeycomb structure having insertion hole
There is disclosed a method for measuring the strength of a honeycomb structure provided with an insertion hole preferably without generating any chipping. In the strength measuring method of the honeycomb structure, the strength is measured while a rubber plug is i...
05/11/2010
7559250Frame crack detection method
A method for detecting a crack in a frame is disclosed. The method includes sensing with a first pressure sensor a first pressure within a first sealed cavity. The first sealed cavity is interior to a first structure of the frame. Additionally, the method includes d...
07/14/2009
7520178Method for inspecting honeycomb fired body and method for manufacturing honeycomb structured body
A method for inspecting a honeycomb fired body includes transporting the honeycomb fired body along a transportation line, and inspecting the honeycomb fired body for a crack during the transporting step. ...
04/21/2009
7516674Method and apparatus for thermally induced testing of materials under transient temperature
A method for measuring the fracture and fatigue crack growth behavior of a material includes heating at least one sample having a first end and a second end and a pre-applied crack between the first end and the second end; heating a fixture having a lower coefficien...
04/14/2009
7503224Vacuum sensor application and method for nondetachably joining a sensor workpiece to a body component
Vacuum sensor application and method for firmly joining a sensor workpiece to a body component, where a) firstly, an adhesive layer which is provided by a cross-linked transfer contact adhesive is laminated to a sensor contact surface of the sensor workpiece, b) the...
03/17/2009
7353715System, apparatus and method for testing under applied and reduced loads
A system which cyclically applies and reduces a load on a test specimen and which can use an apparatus comprising: (a) a frame; (b) a load adjusting section having a fluidic mechanical muscle that contracts and extends in length to cyclically apply and reduce a load...
04/08/2008
7340961Fixture and method for measuring elongation
A fixture for measuring the elongation of a specimen includes a base. The base carries a fixture portion, and the fixture portion is provided with a surface adapted to receive a portion of the specimen. ...
03/11/2008
7334485System, method and computer-readable medium for locating physical phenomena
A method, system and computer product for detecting the location of a deformation of a structure includes baselining a defined energy transmitting characteristic for each of the plurality of laterally adjacent conductors attached to the structure. Each of the plural...
02/26/2008
7317321Methods and systems for automated pipeline testing
A method for testing effectiveness of a cathodic protection device configured to apply at least one voltage across an underground structure and a reference point is described. The method includes providing a sample of the material from which the underground structur...
01/08/2008
7314082Methods of improving well bore pressure containment integrity
Methods of improving the pressure containment integrity of subterranean well bores are provided. The methods include pumping a fracture sealing composition into the well bore that rapidly converts into a high friction pressure sealing composition which is impermeabl...
01/01/2008
7299697Method and system for inspecting objects using ultrasound scan data
A method and apparatus for estimating a depth of a crack from ultrasound scan data are provided. The method includes mapping multiple amplitude responses from the ultrasound scan data, each mapped amplitude response being representative of a signal from one of the s...
11/27/2007
7286964Methods for monitoring structural health conditions
Methods and recordable media for monitoring structural health conditions. The present invention provides a method for interrogating a damage of a host structure using a diagnostic network patch (DNP) system having patches. An interrogation module partitions the plur...
10/23/2007
7278495Horseshoe
A horseshoe includes a thin, resilient member, embedded in a moldable material such as plastic or composite. Due to this dual construction, the horseshoe is strong yet light in weight. The moldable material has a thickness which varies across the horseshoe, so as to...
10/09/2007
7278323Method and apparatus for determining the deflection of a fastener
A method and an apparatus serve for determining the deflection of a fastener, especially a screw. The method includes the steps of (a) recording a first image of the fastener with a first camera; (b) determining two first reference points of the fastener in the firs...
10/09/2007
7278324Carbon nanotube-based sensor and method for detection of crack growth in a structure
A sensor has a plurality of carbon nanotube (CNT)-based conductors operatively positioned on a substrate. The conductors are arranged side-by-side, such as in a substantially parallel relationship to one another. At least one pair of spaced-apart electrodes is coupl...
10/09/2007
7249521Method for determining the presence of a magnetically susceptible or magnetic material in a sample
The present invention is based on the recognition that some materials contain a magnetically susceptible or magnetic component. That is, they exhibit ferromagnetic, paramagnetic, diamagnetic or magnetic properties. According to the invention, it is possible to deter...
07/31/2007
7242483Smart spacecraft structures based on laser metrology
A laser metrology system for estimating the deformation of a structure is provided. The system includes a plurality of laser beam position detectors distributed across a surface of the structure. Each laser beam position detector is intersected by a laser beam and i...
07/10/2007
7231832System and method for detecting cracks and their location
A system and method are provided for detecting cracks and their location in a structure. A circuit coupled to a structure has capacitive strain sensors coupled sequentially and in parallel to one another. When excited by a variable magnetic field, the circuit has a ...
06/19/2007
7230421Damage standard fabrication with attached sensor
Reference standards or articles having prescribed levels of damage are fabricated by monitoring an electrical property of the article material, mechanically loading the article, and removing the load when a change in electrical properties indicates a prescribed leve...
06/12/2007
7231331Method and system to detect stress corrosion cracking in pipeline systems
A method for predicting the location of stress corrosion cracking in a steel gas pipeline in which in-line stress corrosion cracking smart tool data, external low level metal loss data and soil characterization data are compiled to predict the location of stress cor...
06/12/2007
7225681Statistical method for identifying microcracks in insulators
One embodiment of the invention is a method for evaluating a material such as low-k dielectric, by a stress-generating test tool such as a needle. The evaluation object is shaped as a stack of adhering layers: low-k dielectric, first metal (preferably copper), barri...
06/05/2007
7210360Apparatus for sensing position and/or torque
An apparatus measures relative displacement between a first end and a second end of a shaft. The first and second ends being centered on a shaft axis. The apparatus includes first and second ferromagnetic plates. The first ferromagnetic plate has a first side and a ...
05/01/2007
7188533Apparatus for sensing position and/or torque
An apparatus for measuring relative displacement between a first shaft and a second shaft includes first and second rotor assemblies. The first rotor assembly is coupled to the first shaft and is centered on an axis. The second rotor assembly is coupled to the secon...
03/13/2007
7185545Instrumentation and method for monitoring change in electric potential to detect crack growth
Instrumentation for monitoring crack growth using a change in electric potential across a starter crack as the crack propagates is disclosed. The instrumentation includes a specimen of a material to be analyzed for crack growth propagation having a surface with a st...
03/06/2007
7180302Method and system for determining cracks and broken components in armor
A ceramic armor system with built-in conductive circuit attached to a ceramic component. The conductive circuit can be accessed by a user at contacts provided in the system. The circuit is arranged so that damage such as cracks that occurs within the ceramic compone...
02/20/2007
7167009Method and apparatus for determining electrical properties of structures
A method and apparatus for determining an electrical property of a structure. The method involves creating a model of an electrical property of a structure and measuring the electrical property of the structure between at least two of a plurality of locations. The m...
01/23/2007
7158894Residential fuel tank monitoring system and proactive replacement program
A data collection and management system is provided for monitoring the condition of fuel tanks and for determining for each tank a degradation profile which provides an estimate of useful tank life and a prediction of when the tank is likely to need replacement befo...
01/02/2007
7157920Non-destructive monitoring of material integrity
A component which is known to have particular degradation characteristics is instrumented to provide an electrical potential across a section in which a degradation is likely to occur. The potential drop across the component is then monitored to determine when, and ...
01/02/2007
7143915Process to fracture connecting rods and the like with resonance-fatigue
A process to fracture connecting rods and the like, that are made of high strength materials, comprises of the following mechanisms: (a) Fatigue: fluctuation of stresses in a pre-notched connecting rod due to the use of harmonic excitation will extend t...
12/05/2006
7141990Device for detecting degradation of a component
An apparatus for monitoring the structural integrity of a component. A monitoring structure is applied to a component that is subject to structural degradation. The monitoring structure includes an electrical conductor that becomes cracked if the component becomes s...
11/28/2006
7124644Structure for identifying, locating and quantifying physical phenomena
A method and system for detecting, locating and quantifying a physical phenomena such as strain or a deformation in a structure. A minimum resolvable distance along the structure is selected and a quantity of laterally adjacent conductors is determined. Each conduct...
10/24/2006
7111580Device for detecting the presence of a chemical contaminant
The disclosure relates to a device for detecting the presence of a chemical contaminant. The device comprising a resilient indicator element which is biased into a first position and is anchored in the first position by means of a failure element. The failure elemen...
09/26/2006
7096748Embedded strain gauge in printed circuit boards
An apparatus generally having a circuit board and a first strain gauge is disclosed. The circuit board may have a plurality of insulating layers. The first strain gauge may be disposed between two of the insulating layers. ...
08/29/2006
7089802Method and apparatus for determining hydrogen embrittlement
A method and apparatus for determining failure of a test component. The apparatus, according to a selected method, is able to determine the embrittlement potential of a selected procedure for a selected material. The apparatus is able to determine the embrittlement ...
08/15/2006
7089124Structural stress analysis
Structural stress in a fatigue-prone region of a structure is determined by using the nodal forces and displacement values in the fatigue-prone region, or equilibrium-equivalent simple stress states consistent with elementary structural mechanics in the fatigue-pron...
08/08/2006
7082833Method and apparatus for determining and assessing a characteristic of a material
An acoustic energy-based, non-contact or contact testing approach provides low cost, highly accurate, and reliable information to (a) identify flaws and anomalies and (b) assess the integrity of a particular material. This approach is not hindered by surface conditi...
08/01/2006
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