Class / Patent application number | Description | Number of patent applications / Date published |
073799000 | Specimen cracking or crack propagation | 30 |
20080264177 | Vacuum 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) then, by using known radiation methods, the geometric patterns of a plurality of galleries to be arranged in a laminar fashion are transferred to the sensor contact surface by a light beam that penetrates the transfer contact adhesive, are subsequently introduced into the sensor workpiece and, in the process, are removed congruently with the structures of the adhesive layer introduced into the sensor workpiece, c) the adhesive-laminated patterned sensor contact surface is then arranged on a defined surface region of the body component surface, d) after that, a mechanical pressure is exerted on the two joint partners, with which the adhesive-laminated patterned sensor contact surface and the body component surface region ( | 10-30-2008 |
20080276717 | Method to estimate pent values - The PENT value for a resin may be estimated within ±10% by determining the % of heat flow to melt a fraction of a polymer above or below a set point and comparing it to a graph or algorithm of PENT values related to the % of heat flow to melt entire sample for a number of resins made using the same catalyst system. In a similar manner one may estimate the process conditions to prepare a polymer having a target PENT value based on the conditions used to prepare the samples for the graph or algorithms. The invention provides a simple procedure that may be used at a manufacturing site to estimate PENT values. | 11-13-2008 |
20090007690 | Method for Metrologically Determining the End of a Test Interval, and Device for Carrying Out Said Method - The aim of the invention is to create a method that is as accurate and reliable as possible for metrologically determining the end of a test interval (PI) which is to be maintained to perform a periodical test on pressure vessels ( | 01-08-2009 |
20090084188 | Frame 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 detecting a first change in the sensed first pressure. The method also includes determining preliminarily that a crack has formed in the first structure based on the detected change in the sensed first pressure. In addition, the method includes determining a criticality of the crack. | 04-02-2009 |
20100018320 | METHOD 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 the crack, acquiring two images of the surface adjacent to the crack and calculating surface strains on the test sheet. | 01-28-2010 |
20100116062 | CRACK-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 measuring the length of a crack initiated in a test object by a plurality of inspectors and/or a plurality of inspection methods and obtaining correlation information between data acquired through the measurement and the condition of an actual crack; a crack-length estimating step of estimating the actual length of the crack initiated in an inspection target on the basis of the crack length measured by an inspector during inspection of the inspection target and the correlation information; and a crack-propagation-curve estimating step of estimating a crack-propagation curve of the inspection target originating from the crack length estimated in the crack-length estimating step. | 05-13-2010 |
20100126280 | WELD INSPECTION RIG AND RELATED METHOD FOR USE - A weld inspection device is disclosed. The weld inspection device comprises a first annular engagement portion surrounding a central axis and a second annular engagement portion. The first annular engagement portion has a first holed segment extending circumferentially around an outer edge of the first annular engagement portion and having a first hole adapted to receive a threaded member and a standoff segment extending in a first direction along the central axis from the first holed segment, the standoff segment having a concavity. The second annular engagement portion surrounds the central axis and has a second holed segment extending circumferentially around the central axis and having a second hole adapted to receive and threadedly engage a threaded member, and a retaining flange extending radially inward toward the central axis. | 05-27-2010 |
20100162825 | SYSTEM AND METHOD FOR MONITORING HEALTH OF STRUCTURAL JOINTS - The present invention provides a system and a method monitoring the health of structural joints by monitoring the strain developed near the joint due to perturbation applied away from that joint and comparing the monitored strain to strain which develops in a healthy joint due to comparable perturbation. The system for monitoring joints comprises: at least one near field strain measuring device installed near a monitored joint for monitoring the induced strain; at least one far field strain indicating device installed away from monitored joint indicating, measuring or producing the perturbation; and a data processor connected to said near field strain measuring device and to said near field strain measuring device for analyzing the response of the structure to the perturbation and determining the integrity of said joint. The method may also be used for detection and monitoring of off-joint crack initiation and edge delamination in composites. | 07-01-2010 |
20100236334 | MULTIPLE 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 and a crack stop. The structure arrests cracks from propagating from the at least one perimeter side to an interior of the die and provides an electrical resistance value as a function of an amount of strain existing where the structure is positioned. In another form the structure is implemented on a substrate such as a printed circuit board rather than in a semiconductor die. | 09-23-2010 |
20110005329 | METHOD FOR TESTING FATIGUE IN HYDROGEN GAS - There is provided a fatigue test method with which the crack growth can be checked for a plurality of cycle rates in a single test. At a first cycle rate f | 01-13-2011 |
20110192232 | METHOD AND APPARATUS FOR JUDGING FRACTURE OF METAL STAMPED PRODUCT, PROGRAM AND COMPUTER-READABLE RECORDING MEDIUM - In the process of target stamping for fracture judgment, an acquisition unit acquires, as target data for fracture judgment, strain of a target die to be measured over the duration from the start time of stamping measured by strain measuring units to the finishing time of stamping, and also acquires production conditions typically by measurement. An extraction unit extracts the reference data, which gives the minimum total of differences between the production conditions of the reference data and the production conditions of the target data for fracture judgment, as the comparative data. A judging unit compares strain in the comparative data extracted by the extraction unit and strain in the target data for fracture judgment, and judges occurrence of a crack in a stamped product, if the maximum value of the difference is not smaller than a predetermined value. | 08-11-2011 |
20120103104 | TESTING DEVICE FOR STRESS CORROSION CRACKING - The present disclosure provides a device for stress corrosion testing of materials, e.g., a test specimen, in corrosive materials. It also provides a testing method that is easy to employ in a consistent and controlled manner and also makes efficient use of the potentially corrosive materials. | 05-03-2012 |
20120103105 | TESTING DEVICE FOR STRESS CORROSION CRACKING - The present disclosure provides a device for stress corrosion testing of materials, e.g., a test specimen, in corrosive materials. It also provides a testing method that is easy to employ in a consistent and controlled manner and also makes efficient use of the potentially corrosive materials. | 05-03-2012 |
20120210801 | Fatigue Crack Growth Test Apparatus - An apparatus for fatigue and/or crack growth testing, including a cyclic loading device and a preferred sample mounted at one end. An embodiment of the device has at least two concentric and coaxial load frames, with guiding interfaces between adjacent load frames to maintain alignment. Solid state actuation systems, which deform in response to the application of energy, are mounted at the end opposite the sample between adjacent load frames to provide up to two modes of actuation, including tension, compression, or torsion. The preferred sample includes a cylindrical gage section with a concentric hole running from a first end, and terminating within the gage section, with one mode of loading introduced at the terminus of the hole, and reacted at the end where the hole originates. A second mode of loading is optionally introduced at a second end of the specimen. Mount hardware for conventional specimens is also presented. | 08-23-2012 |
20130008258 | METHOD, APPARATUS AND SYSTEM FOR TESTING THE SELF-SEALING CAPABILITIES OF A CONCRETE SAMPLE - A method, apparatus and system for testing the self-sealing properties of a concrete sample. The method may include providing an apparatus for creating a consistent and reproducible crack in a concrete sample and creating a consistent and reproducible crack in the concrete sample with the apparatus. The method may further include providing a fluidic delivery system that provides a consistent flow of fluid for testing the self-sealing properties of the concrete sample and testing the self-sealing properties of the concrete sample with the system. | 01-10-2013 |
20130086991 | DETECTION PROCESS - A detection process is disclosed. The detection process includes applying a load to a preselected portion of an article. The applying of the load permits visually indiscernible cracks in the preselected portion of the article to be detected. The treated article includes a preselected portion having treated visually indiscernible cracks. The treated visually indiscernible cracks are substantially devoid of damage due to the treatment of the visually indiscernible cracks. | 04-11-2013 |
20130112005 | APPARATUS AND METHOD FOR TESTING THE ADHESIVE STRENGTH OF A COATING ON A SUBSTRATE - A device for testing the adhesive strength of a coating on a substrate, containing a unit for generating mechanical stress in a predefinable surface area of the coating and an evaluation system, which contains a unit for image acquisition and a unit for evaluating the cracks that occur, wherein the device further contains a transport unit, by which the substrate can be moved at least from the unit for generating mechanical stress to the evaluation system, and a heating unit, by which the substrate can be heated to a predefinable temperature. | 05-09-2013 |
20130133434 | STRESS CORROSION CRACKING TESTING DEVICE - The stress corrosion cracking (SCC) testing device includes a corrosion cell for placing a specimen to be tested therein. The corrosion cell is configured to simulate the extreme high temperature and pressure, as well as the corrosive environments experienced by engineered, industrial components. A heating element and a pressurizing assembly are operatively attached to the corrosive cell to simulate the high temperature and pressure environs. A circulation assembly is also attached to the corrosion cell to simulate both flowing and stagnant conditions of the corrosion solution that the industrial component can be subjected to. A loading assembly with a specimen holding shaft is operatively attached to the specimen to place a predetermined and constant tensile load on the specimen until fracture in order to determine K | 05-30-2013 |
20130133435 | BENDING SENSOR - A bending sensor includes a high resistance layer; a low resistance layer having a crack and a lower electrical resistance than the high resistance layer in a state where the crack is closed; an insulating layer between the high and low resistance layers; and a plurality of electrode portions connecting electrically in parallel the high resistance and low resistance layers. In an OFF state where a bend amount is small, the crack is unlikely to open and a combined resistance of electrical resistances of the high resistance layer and the low resistance layer is output as OFF resistance from the plurality of electrode portions. In an ON state where the bend amount is large, the crack is likely to open and at least the electrical resistance of the high resistance layer is output as ON resistance higher than the OFF resistance from the plurality of electrode portions. | 05-30-2013 |
20130152697 | Fatigue and/or Crack Growth Test Sample - A sample for fatigue and/or crack growth testing, including an axisymmetric or cylindrical gage section with a concentric hole running from a first end, and terminating within the gage section, with one mode of loading introduced at the terminus of the hole, and reacted at the end where the hole originates. A second mode of loading is optionally introduced at a second end of the specimen. Use of the specimen is described in both in the context of an apparatus for fatigue/crack growth testing described in the referenced parent application, as well as with conventional test machines. | 06-20-2013 |
20130333481 | METHOD OF DETERMINING FATIGUE CRACK LIFETIME IN HIGH-PRESSURE HYDROGEN ENVIRONMENT - In a method of determining a fatigue crack lifetime of a low-alloy steel material coming in contact with high-pressure hydrogen in a high-pressure hydrogen environment, estimate a fatigue crack acceleration starting point K | 12-19-2013 |
20140069203 | MULTIPLE SPECIMEN TESTING - Systems and methods are described for concurrently applying loads to multiple test specimens. The systems and methods are useful for cyclical tensile loading of specimens such as in fatigue strength evaluations. The systems and methods are also useful for low frequency cyclical loading evaluations. | 03-13-2014 |
20140230561 | FUSION BEAD TESTING DEVICE AND METHOD OF TESTING A FUSION BEAD - A fusion bead testing device is provided for testing the strength of a fusion bead removed from a pipe joint. The testing device comprises a first pressing means for exerting a force against the fusion bead. If the fusion bead splits as a result of the applied force then the fusion bead fails a quality control test and the fusion bead and consequently the pipe joint from which the bead was removed are deemed too weak. The fusion bead testing apparatus comprises an automatic split detection device for detecting a split in the bead. | 08-21-2014 |
20140283619 | METHOD FOR EVALUATING CORROSION-FATIGUE LIFE OF STEEL MATERIAL - A method for evaluating the corrosion-fatigue life of a steel material includes: bringing a corrosive medium into contact with a predetermined portion of the steel material; measuring strain on the steel material while applying cyclic loads to the steel material; measuring an N-th strain index from strain amplitude at the number of initial load applications and strain amplitude at the N-th load application (N is a natural number larger than the number of initial load applications); and estimating the corrosion-fatigue life of the steel material by comparing the N-th strain index with a previously certified life strain index. | 09-25-2014 |
20150090045 | METHOD AND DEVICE FOR THE EARLY DETECTION OF CRACK FORMATIONS IN MEDIA-CARRYING WORKPIECES - A device is provided for the early detection of crack formations in work pieces or in components that are subjected to mechanical loading. Wherein in the region of at least one surface at risk of cracking there is arranged at least one testing chamber that is formed by a generative process of manufacturing the work piece or a portion of a work piece and to which a testing medium under pressure is admitted. Either a pressure sensor for determining a drop in pressure resulting from a crack formation of the work piece is connected to the testing chamber or a gas sensor that can also react to a testing medium escaping from the testing chamber in the event of crack formation is arranged in the vicinity of the testing chamber. | 04-02-2015 |
20160097702 | METHOD OF TESTING A POLYCRYSTALLINE DIAMOND COMPACT CUTTER - The method for determining fracture toughness includes clamping a cutting element in a first orientation, exerting a confining pressure on the cutting element, applying a first load at a first distance from a perimeter of the diamond table of the cutting element, increasing the first load to a first level sufficient to fracture, and recording the first level sufficient to fracture. Then, another load is applied at another distance from a perimeter of the diamond table with another cutting element or the same cutting element in another orientation. The load is increased until fracture again. The steps are repeated at different distances and different orientations to create a profile of the fracture toughness of the cutting element. The method also includes wearing the cutting element and measuring fracture toughness at a worn distance. The profile is a more complete rating of the cutting element under drilling conditions. | 04-07-2016 |
20160131564 | Systems and Methods for Determining the Effective Toughness of a Material and for Implementing Materials Possessing Improved Effective Toughness Characteristics - Systems and methods in accordance with embodiments of the invention determine the effective toughness of a given material, and also implement materials possessing improved effective toughness values. In one embodiment, a method of determining the effective toughness of a material includes: causing a crack to propagate through the material; where the relative constant velocity and the relative overall direction are prescribed and maintained for the duration of the propagation of the crack through the material; measuring the energy release rate of the crack as it propagates through the material; and defining the effective toughness of the material as the maximum value of the measured energy release rate. | 05-12-2016 |
20160161383 | STRUCTURAL CRACK MONITORING DEVICE AND RELATED METHODS - A system for monitoring a crack in a structural member includes a first fixable component having a first plate defining a top surface and a bottom surface. The first plate is at least partially transparent in at least a first area thereof, and the first fixable component further includes a mounting surface disposed away from the bottom surface of the plate. The system also includes a second fixable component having a second plate defining a top surface and a bottom surface defining a mounting area thereon. A distance between the mounting surface and the bottom surface of the first plate is greater than a thickness of the second plate defined between the top and bottom surfaces thereof. A measurement array and a pair of orthogonal crosshairs are disposed on respective ones of the first plate within the at least partially transparent area and the second plate. | 06-09-2016 |
20160161395 | METHOD OF NON-DESTRUCTIVE EVALUATION OF INTERGRANULAR STRESS CORROSION CRACKING (IGSSC) IN STRUCTURAL COMPONENTS MADE OF METAL ALLOYS, AND THE METHOD OF LIFETIME EVALUATION OF THE STRUCTURAL COMPONENTS - A method of non-destructive evaluation of stress corrosion cracking of structural components made of metal alloys, and a method of evaluation of the remaining lifetime of the structural component made of metal alloys are provided, in which a change in properties of the structural components made of metal alloys being used in operating nuclear power plants is measured according to the degree of atomic ordering (or short range ordering) of alloying atoms, and stress corrosion cracking of the structural components made of metal alloys is thus evaluated. The properties to be measured may be one or more selected from a group consisting of hardness, electrical resistivity and thermal conductivity. | 06-09-2016 |
20160202161 | CRACK SENSOR AND CRACK MONITORING DEVICE | 07-14-2016 |