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Sia Nemat-Nasser, Jon Isaacs, Jacob Rome
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Gary R. Halford, Bradley A. Lerch, Michael A. McGaw
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load cells
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Published: 31 December 2017
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Published: 01 January 2000
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Load cell and digital load indicator used to calibrate a 200,000 lbf hydrau...
Available to PurchasePublished: 01 January 2000
Fig. 9 Load cell and digital load indicator used to calibrate a 200,000 lbf hydraulic testing machine
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Fracture surface of a broken AISI 4140 steel load cell. The radial marks in...
Available to PurchasePublished: 01 January 1987
Fig. 336 Fracture surface of a broken AISI 4140 steel load cell. The radial marks indicate that two crack origins formed at the bottom surface of the cell, apparently near the toe of a weld. Note the continuous shear lip around the top edge. See also Fig. 337 and 338 . Actual size
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Published: 01 January 2006
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Published: 01 January 2000
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Published: 01 January 2000
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Oscilloscope record of load cell force versus time during a dynamic tension...
Available to PurchasePublished: 01 January 2000
Fig. 6 Oscilloscope record of load cell force versus time during a dynamic tension test depicting the phenomenon of ringing. The uncontrolled oscillations result when the loading rate is near the resonant frequency of the load cell. The scales are arbitrary. Source: Ref 5
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Image
Published: 01 January 2000
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Mating fracture surfaces of a broken AISI 4140 steel load cell. The radial ...
Available to PurchasePublished: 01 June 2024
Fig. 10 Mating fracture surfaces of a broken AISI 4140 steel load cell. The radial marks indicate two crack origins formed at the bottom surface of the cell, near the toe of a weld. Note the continuous shear lip around the top edge. Although there is no visible evidence of fatigue marks
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Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0009152
EISBN: 978-1-62708-186-3
... Abstract This article discusses the installation of the most commonly used force-monitoring devices, namely, load cells and piezoelectric force sensors. It describes the purpose and operation of commonly used displacement sensors, such as linear variable differential transformers, proximity...
Abstract
This article discusses the installation of the most commonly used force-monitoring devices, namely, load cells and piezoelectric force sensors. It describes the purpose and operation of commonly used displacement sensors, such as linear variable differential transformers, proximity sensors, photoelectric sensors, and ultrasonic sensors. The article provides information on the sensors used for detecting tool breakages and flaws in parts, the measurement of material flow during sheet metal forming, and lubrication. It also describes the operating stages of machine vision systems used for automated quality-control purposes. The theory of eddy-current-based material properties evaluation is also discussed.
Book Chapter
Triaxial Hopkinson Techniques
Available to PurchaseSeries: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003301
EISBN: 978-1-62708-176-4
... and the dynamic triaxial load cell on a 19-mm Hopkinson bar. lateral compression pneumatic pressure vessel 75-mm Hopkinson system concrete rock polymeric composites coarse microstructure dynamic triaxial load cell 19-mm Hopkinson bar triaxial Hopkinson techniques axial compression COMPRESSIVE...
Abstract
Triaxial Hopkinson techniques can be used to simultaneously subject a sample to axial and lateral compressions. The lateral compression may be applied through a pneumatic pressure vessel or dynamically using a special Hopkinson technique. This article reviews these two techniques in detail. It illustrates a 75-mm Hopkinson system, particularly designed to test large samples of concrete, rock, polymeric composites, and other materials with relatively coarse microstructures. The article also provides information on the pneumatic pressure vessel for a 75-mm Hopkinson bar test system and the dynamic triaxial load cell on a 19-mm Hopkinson bar.
Book Chapter
Fatigue, Creep Fatigue, and Thermomechanical Fatigue Life Testing
Available to PurchaseSeries: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003314
EISBN: 978-1-62708-176-4
... fatigue testing machines and bending fatigue machines. Load cells, grips and alignment devices, extensometry and strain measuring devices, environmental chambers, graphic recorders, furnaces, and heating systems of ancillary equipment are discussed. The article presents technologies available...
Abstract
This article describes the phenomena of crack initiation and early growth. It examines specimen design and preparation as well as the apparatus used in crack initiation testing. The article provides descriptions of the various commercially available fatigue testing machines: axial fatigue testing machines and bending fatigue machines. Load cells, grips and alignment devices, extensometry and strain measuring devices, environmental chambers, graphic recorders, furnaces, and heating systems of ancillary equipment are discussed. The article presents technologies available to accomplish closed loop control of materials testing systems in performing standard materials tests and for the development of custom testing applications. It explores the advanced software tools for materials testing. The article includes a description of baseline isothermal fatigue testing, creep-fatigue interaction, and thermomechanical fatigue. The effects of various variables on fatigue resistance and guidelines for fatigue testing are also presented.
Book Chapter
Testing Machines and Strain Sensors
Available to PurchaseSeries: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003259
EISBN: 978-1-62708-176-4
.... If the crosshead speed is too high, inertia effects can become important in the analysis of the specimen stress state. Under conditions of high crosshead speed, errors in the load cell output and crosshead position data may become unacceptably large. A potential exists to damage load cells and extensometers under...
Abstract
The article provides an overview of the various types of testing machines: gear-driven or screw-driven machines and servohydraulic machines. It examines force application systems, force measurement, and strain measurement. The article discusses important instrument considerations and describes gripping techniques of test specimens. It analyzes test diagnostics and reviews the use of computers for gathering and reducing data. Emphasis is placed on universal testing machines with separate discussions of equipment factors for tensile testing and compressing testing. The influence of the machine stiffness on the test results is also described, along with a general assessment of test accuracy, precision, and repeatability of modern equipment.
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Electrohydraulic testing machine modified for combined torsional and axial ...
Available to PurchasePublished: 01 January 2005
Fig. 11 Electrohydraulic testing machine modified for combined torsional and axial loading: 1, upper crosshead; 2, tension load cell; 3, torque cell adapter No. 1; 4, torque cell; 5, torque cell adapter No. 2; 6, water-cooled grip; 7, specimen holder; 8, specimen; 9, induction coil; 10, ram
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Image
Electrohydraulic testing machine modified for combined torsional and axial ...
Available to PurchasePublished: 01 January 2000
Fig. 18 Electrohydraulic testing machine modified for combined torsional and axial loading. 1, upper crosshead; 2, tension load cell; 3, torque cell adapter No. 1; 4, torque cell; 5, torque adapter No. 2; 6, water-cooled grip; 7, specimen holder; 8, specimen; 9, induction coil; 10, ram; 11
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Slider-on-flat-surface testing rig. (a) Overview. (b) Tool holder with load...
Available to PurchasePublished: 15 January 2021
Fig. 16 Slider-on-flat-surface testing rig. (a) Overview. (b) Tool holder with load cells and actuator (A, normal load; B, friction force; C, load actuator). (c) Testing progression. Adapted from Ref 52
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Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003265
EISBN: 978-1-62708-176-4
... and lateral dimensions are measured after each increment of deformation. For high-temperature deformation or continuous testing, the test-equipment load cell and crosshead displacement can be used to determine the load and dimensional changes of the specimen. In the latter measurement, it is necessary...
Abstract
Compression tests are used for subscale testing and characterizing the mechanical behavior of anisotropic materials. This article discusses the characteristics of deformation during axial compression testing, including deformation modes, compressive properties, and compression-test deformation mechanics. It describes the procedures for the use of compression testing for the measurement of the deformation and fracture properties of materials. The article provides a detailed discussion on the technique involved in determining the stress-strain behavior of metallic materials based on the ASTM E 9, "Compression Testing of Metallic Materials at Room Temperature." It also reviews the factors that influence the generation of test data for tests conducted in accordance with the ASTM E 9 and the capabilities of conventional universal testing machines for compression testing.
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Schematic illustrating crosshead displacement and elastic deflection in a t...
Available to PurchasePublished: 01 January 2000
, load cell, specimen ends, etc.; F is the force acting on the specimen. The development of Eq 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , and 12 describes the effects of testing machine stiffness on tensile properties. Source: Ref 7
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Published: 01 January 2000
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