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Sunday, August 2, 2020 | History

2 edition of Correlation of tension and torsion creep data found in the catalog.

Correlation of tension and torsion creep data

by Shou Kang Wang

  • 91 Want to read
  • 34 Currently reading

Published by Naval Postgraduate School in Monterey, California .
Written in English

    Subjects:
  • Mechanical engineering

  • Edition Notes

    ContributionsNaval Postgraduate School (U.S.)
    The Physical Object
    Pagination1 v. :$bill. ;
    ID Numbers
    Open LibraryOL25166911M

    Rocks subjected to long-term loading have been known to suffer microcracking. The rate of cracking is sensitive to the type of the applied stress (tensile or compressive), and the magnitude of the stress relative to the instantaneous strength. In addition, crack growth is influenced by the environment (pressure and temperature) including the presence or absence of moisture. Creep-Fatigue Life Evaluation for Materials Subjected to Nonproportionally Combined Tension and Torsion Article (PDF Available) in Procedia Engineering December with 37 Reads.

    Nonlinear constitutive equations for varying stress histories are developed and used to predict the creep behavior of stainless steel at degree C under variable tension or torsion stresses. Experiments include tensile relaxation; simultaneous tension relaxation with step changes in torsion creep and reversed torsion; and alternate creep and relaxation. Results were compared with theoretical models developed previously using as input creep and creep recovery data under constant stress states only.

    The SnAg compression, bulk solder data suggests higher strength or creep resistance in compression than in tension. However, we were not able to find a correlation . An experimental and analytical investigation is presented for simultaneous stress relaxation in tension and creep in torsion of polyurethane in the nonlinear range of stresses. The method employed a multiple integral approach with an assumed product form of kernel function to describe creep behavior.


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Correlation of tension and torsion creep data by Shou Kang Wang Download PDF EPUB FB2

Enter the password to open this PDF file: Cancel OK. File name:. Creep of alloy H under tension and torsion When the constant C is conventionally taken as 20, only those data for the present material, i.e. those supplied by the manufacturer together with the present results, contract, approximately, on to a single master curve of stress versus an abscissa defined by eqn (11).Cited by: 2.

Access to raw data. API Dataset FastSync. Content discovery. Recommender Discovery. Managing content. Repository dashboard. Support. About CORE Blog Contact us. Location of Repository Correlation of tension and torsion creep data. By Shou Kang Wang. Get PDF (3 MB) : Shou Kang Wang.

Torsion testing involves twisting the wire, either to failure or to some predetermined number of twists, whereupon inspection for surface cracking can be undertaken. The strain of interest is the engineering shear strain, γ, which involves displacements in the wire cross section plane in the circumferential value of this strain is given by.

In torsion tests a failure criterion based on 'life to tertiary strain' provides good correlation with the tensile data. It is anticipated that the application of the theta projection creep analysis to this type of fatigue behaviour will provide an economic means for the development of a biaxial fatigue by:   The slopes of the bend and torsion data in fig.

1 were calculated for dose values greater than dpa in order to evaluate the steady state irradiation creep coefficient. Correlation of tension and torsion creep data book the case of torsion, the stress relaxation is related to the steady state creep coefficient according to: ln(T/To)= -3G/, where G is the shear modulus and the subscript 0.

Creep rupture data for stainless steel plotted as the effective stress (top), the maximum principal stress (middle) and the principal facet stress (bottom) vs the logarithm of the rupture time. 60 50 40 30 20 10 4U Pure Copper Temperature = K Stanzl, Argon & Tschegg () o Tension Torsion --I I I I III 30 0 Pure Copper.

Predictions were calculated from results of combined constant-stress tension and torsion creep and recovery tests only, which were reported previously. Results showed that a modified viscous-viscoelastic theory predicted all the observed features and predicted the creep and relaxation rates reasonably well.

In addition, experimental data for torsion members of solid cross section subjected to step changes in load and temperature are described by means of two creep relations and the strain-hardening rule and flow criteria of von Mises and Tresca.

Accurate description of the experimental data for SAE steel is obtained with the von Mises criterion. The stretch of a bolt or metal rod loaded in tension is calculated by use of the following equation.

If the turn-to-tension procedure is used to establish clamping load, it is necessary to know both the spring rate of the bolt and the spring rate of the clamped components, since turning the bolt stretches the.

creep-rate or plastic strain-rate is constant under constant true von Mises stress (tension, compression or torsion). In a constant strain-rate test, the flow stress is independent of plastic strain except for changes in texture (e.g., changes in the average Taylor factor of a polycrystal), often evident in larger strain experiments.

Nonproportionally Combined Tension and Torsion Katsuyuki Tokimasaa* aFaculty of Biology-Oriented Science & Technology, Kinki University, Nishimitani, KinokawaJapan Abstract The author and his colleagues have proposed in their recent works the creep-fatigue life prediction method based.

Furthermore, it is necessary to use the results of three series of the basic experiments (uniaxial tension, uniaxial compression and pure torsion) to describe the creep deformation of an aluminum. Predictions were calculated from results of combined constant-stress tension and torsion creep and The correlation of enthalpy of mixing and internal strain energy calculated by the elastic.

Creep and recovery data are presented for combined tension and torsion of Aluminum at °C (°F). These data are represented by a mechanical-mathematical model in which the strain is resolved into five components: elastic, time-independent plastic, recoverable viscoelastic, time-dependent nonrecoverable viscous (positive) and time-dependent nonrecoverable viscous (negative).

The present set of fatigue lifetime data for 63SnPb solder for uniaxial and tension torsion differed by a factor of or less on the basis of several of these models. The maximum plastic shear strain was the best overall parameter to use in a Coffin-Manson-type plot with all data differing by no more than a factor of from the uniaxial.

A review of the literature revealed no torsion creep data on noncircular tubes. Hence, to evaluate the theory, a test program was carried out on twelve specimens of aluminum alloy structural tubing, of four configurations, at F.

Tension-torsion fatigue testing machine and extensometer used. the fatigue data can be evaluated without This material was almost not affected by the creep damage with tension hold for 3. We analyze the comparison of the fatigue characteristics and, in particular, the coefficients of tensioncompression and cyclic torsion based on the data of available tests performed under low-cycle fatigue in various materials.

The correlation of torsion and tension-compression fatigue strength coefficients does not depend on the relative slope of the fatigue diagrams used to describe plastic. Abstract.

Biaxial tension-torsion hydraulic machines are available commercially together with a few specific devices directly constructed by the users (Tapsell and Johnson, ; Trampczynski, Morrison and Topliss, ; Henderson and Dyson, ).In the case of high temperature properties creep plays a predominant part and occurs with low strain rates (\(\dot \varepsilon {10^{ - 6}}{s^{ - 1.

Modeling of the strain rate effect, creep and relaxation of a Ni-Ti shape memory alloy under tension (compression) - torsional proportional loading in the pseudoelastic range. C Lexcellent and J Rejzner. Smart Materials and Structures, Volume 9, Number 5.Tension. Tension stress (or tensile stress) occurs when two forces pull on an object in opposite directions so as to stretch it and make it longer and thinner.

The primary load a muscle experiences is a tension load. When the muscle contracts it pulls on the tendons at both ends, which stretch a little.

So the tendons are under tensile stress.Creep experiments involve the application of a constant stress and the subsequent measurement of strain as a function of time at some constant temperature. The loading configuration can be uniaxial tension, uniaxial compression, flexure, torsion or some combination of these modes (see Tensile and Compressive Testing, Flexural and Torsion Testing).