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constant load test

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Published: 01 December 2003
Fig. 14 Constant-load test for glassy plastics. Source: Ref 48 More
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Published: 01 December 2003
Fig. 12 Constant tensile load test setup for polyethylene pipe. At upper left is close-up view of specimen in the fixture. The specimen is placed under load in a given environment in the metal can, which is fastened to the base of the assembly. Source: Ref 40 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780305
EISBN: 978-1-62708-281-5
... to ESC, namely constant tensile load testing and constant-strain testing. environmental stress crazing glassy thermoplastics polyethylenes nylons constant tensile load testing constant-strain testing CRAZING can be described as the formation of regions of plastic deformation normal...
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Published: 01 December 2008
Fig. 29 Constant load stress corrosion cracking (SCC) tests in aerated MgCl 2 at 150 °C. Source: Ref 5 More
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Published: 01 November 2012
Fig. 2 Stages of creep deformation. (a) Strain curve for the three stages of creep under constant-load testing (curve A) and constant-stress testing (curve B). (b) Relationship of strain rate, or creep rate, and time during a constant-load creep test. The minimum creep rate is attained during More
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Published: 01 January 2017
Fig. 17.4 Schematic comparison of changing stress during initiation and growth of isolated SCC in tests of a uniaxially loaded tension specimen. (a) Constant-strain test. (b) Constant-load test. σ M is the maximum stress at crack tip, σ N is the average stress in the net section, and σ G More
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Published: 01 August 2005
Fig. 2.79 Tyical creep curve showing the three stages of creep. Curve A , constant-load test; curve B , constant-stress test. Source: Ref 2.2 More
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Published: 01 January 2017
Fig. 1.19 Variation in the average crack propagation rate in sensitized type 304 stainless steel in water at 288 °C (550 °F) with oxygen content. Data are from constant-extension-rate testing, constant-load testing, and field observations on boiling water reactor piping. IGSCC, intergranular More
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Published: 01 January 2017
Fig. 7.18 Effect of percent of cold work and phase (solution and vapor) on time to failure of α brass in 15 N aqueous ammonia containing 6 g/L dissolved copper in constant load tests at 50% of the yield strength. Source: Ref 7.54 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090367
EISBN: 978-1-62708-266-2
... it is necessary to select smaller specimens that afford the required predictive capability. Before about 1965, only constant-load or constant-strain tests of smooth and notched test specimens of various configurations were used to assess SCC. During the 1960s, two accelerated testing techniques based...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090221
EISBN: 978-1-62708-266-2
... of the cupric complex ion in solution, which promotes SCC, is to anodically polarize the specimen. Tong ( Ref 7.27 ) observed similar behavior for Cu-30Zn specimens tested under constant-load conditions in a nontarnishing 1 M ammonia solution containing added copper. In these tests, the data exhibited maximum...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060001
EISBN: 978-1-62708-343-0
... strain and strain rate equations, explains how to determine creep constants, and reviews the findings of several studies on cyclic loading. It also discusses the development of a novel test that measures the cyclic creep-rupture resistance of materials in tension and compression. activation energy...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490059
EISBN: 978-1-62708-340-9
... properties are generally determined by means of a test in which a constant uniaxial load or stress is applied to the specimen and the resulting strain is recorded as a function of time. Typical shapes of creep curves are shown in Fig. 3.1 . After the instantaneous strain, ∊ 0 , a decelerating strain-rate...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240265
EISBN: 978-1-62708-251-8
..., the stress-rupture test, measures the time it takes for a metal to fail at a given stress at elevated temperature. Engineering creep is measured by applying a constant load on a tensile specimen at a constant temperature and measuring the strain, or extension, of the specimen as a function of time...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610415
EISBN: 978-1-62708-303-4
... creep is measured by applying a constant load on a tensile specimen at a constant temperature and measuring the strain, or extension, of the specimen as a function of time. A schematic of a test setup for a creep test is shown in Fig. 1 . Creep tests may be run for as short as several months to as long...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060065
EISBN: 978-1-62708-355-3
..., such as constant load control, constant strain control, and constant crosshead speed control. Constant crosshead speed is the most common method for tensile tests. Constant Load Rate Testing With appropriate modules on a UTM system, a constant load rate test can be accomplished easily. In this configuration...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
...- and microscale aspects of deformation and fracture, it is useful to study the load-carrying characteristics of an engineering material through its stress-strain curve obtained from a tension test. The information provided by such a curve is particularly useful to those involved with the plastic working of metals...
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Published: 01 January 2017
Fig. 17.30 Schematic comparison of determination of K ISCC or K th . (a) Constant-load ( K -increasing) test. (b) Constant crack opening displacement ( K -decreasing) test More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060013
EISBN: 978-1-62708-355-3
... property tests Range of strain rate Type of test 10 –8 to 10 –5 s –1 Creep test at constant load or stress 10 –5 to 10 –1 s –1 Tension test with hydraulic or screw driven machines 10 –1 to 10 2 s –1 Dynamic tension or compression tests 10 2 to 10 4 s –1 High-speed...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850334
EISBN: 978-1-62708-260-0
... plastic material is one with constant yield stress. A material that can be plastically deformed in the uniaxial tension test will not deform plastically under a hydrostatic pressure, even if the applied load significantly exceeds the material’s yield strength. Plastic deformation requires either shear...