Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    AE Evaluation of Relationship between AE Signals and Fracture Mechanisms for the Weldment of Pressure Vessel Steel (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 26-28 (Oct. 2007), p. 1181-1186 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The purpose of this study is to find out the AE characteristics and fracture mechanismsthrough AE signal analysis for the weldment, PWHT specimen and basemetal of the pressure vesselsteel. Charpy sized specimens were taken from the multi-passed weld block. Specimens were givento four point bend and AE tests. Lots of AE signals were emitted from the weldment compared withthe basemetal and PWHT specimen. Besides, amplitude for the weldment was the largest, followedby PWHT specimen and basemetal and more AE counts for the weldment were emitted in theprocess of deformation. Lots of microcracks around the notch for the weldment were formed so thatmore AE signals were produced. In addition, second phase particle such as MgO for the basemetalacts as AE source. However, in case of weldment, debonding mechanisms between matrix and hardoxides which are formed during welding in air attributed to the emission of AE signals and softenedparticles for the PWHT specimen cause to produce the low level AE signals
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.1181.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Elasto-Plastic Stress Distribution in Triplate Joint Assembly under Bending Moment (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 345-346 (Aug. 2007), p. 1437-1440 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Pre-produced triplate transition joint assemblies are widely used in shipbuilding industry tomake welds between aluminum and steel for a number of years now. The straight-shaped transitionjoint assemblies are bent during shipbuilding. So it is necessary to study the residual stresses createdby punch forming, which would have heavy effects on the quality of structural parts. ABAQUS is asuite of powerful engineering simulation programs, based on the finite element method. In this paper,ABAQUS was used as the main tool to simulate the residual stresses in a triplate transition joint afterunloading. Punch-pressing was carried to simulate bending moment in ABAQUS. The triplate isconsisted of baselayer (steel: Lloyd’s Shipplate Gr. A), interlayer (pure aluminum: Al99.5) andsuperlayer (Al-Mg alloy: AlMg4.5Mn). Results from the ABAQUS analysis showed that increasingthe radius of punch significantly reduced the von Mises residual stresses in steel. Changes of vonMises residual stresses in interlayer (Al99.5) and superlayer (AlMg4.5Mn) were negligible
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.1437.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Surface Modification of Polymer by Ion Assisted Reaction (1997)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 137 (Apr. 1997), p. 107-114 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/44/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.137.107.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Residual Stress Evaluation and Its Effects on the Fatigue Life of an Autofrettaged Tube (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 321-323 (Oct. 2006), p. 699-702 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The theoretical residual stresses in the autofrettaged tube were calculated, consideringBauschinger effect caused by the reverse yielding while removing autofrettage pressure. Actualresidual stresses were measured by using X-ray diffraction analysis, and compared with thetheoretical calculations. From the tension-compression tests, however, the tube steel showed asignificant Bauschinger effect, depending on the plastic strain prior to unloading. Fatigue crackgrowth life of the tube was evaluated by integrating the crack growth rate equation. Stress intensityfactor of an inside crack at the tube due to pressure and residual stresses was determined from finiteelement analysis and superposition principle. Compared to the unautofrettaged tube, the extendedfatigue life of the autofrettaged thick-walled tube was obtained depending on the autofrettage leveland the Bauschinger effect
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.699.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Fatigue Life Simulation of a High Pressure Breech System (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 1027-1030 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In order to evaluate the structural integrity of the breech system used for a thick-walledcylinder subjected to pulsating high internal pressure, fatigue life simulation of a breech system wasperformed. A stress analysis of the breech was performed to locate the critical region vulnerable tocrack initiation. Low-cycle fatigue behavior of the breech material was investigated to obtain thefatigue crack initiation properties. Elastic-plastic finite element stress analysis resulted in a stressconcentration at the breech ring groove root. Strains at the breech ring and block wereexperimentally measured using strain gages and resulted in similar values compared to thecalculated strains. Local strain approach was employed to estimate the fatigue life of the breechsystem for crack initiation at the groove root of the breech ring. Fatigue tests using simulationspecimens were performed and an averaged fatigue life was obtained, showing a very goodagreement with the calculated fatigue life within a factor of two
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.1027.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Stress Corrosion Cracking Life Estimation of Hold-Down Spring Screw for Nuclear Fuel Assembly (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 297-300 (Nov. 2005), p. 1834-1839 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Hold-down spring screw fractures due to primary water stress corrosion cracking were observed in nuclear fuel assemblies. The screw fastens hold-down springs that are required to maintain the nuclear fuel assembly in contact with upper core plate and permit thermal and irradiation-induced length changes. In order to investigate the primary causes of the screw fractures, the finite element stress analysis and fracture mechanics analysis were performed on the hold-down spring assembly. The elastic-plastic finite element analysis showed that the local stresses at the critical regions of head-shank fillet and thread root significantly exceeded the yield strength of the screw material, resulting in local plastic deformation. Preloading on the screw applied for tightening had beneficial effects on the screw strength by reducing the stress level at the critical regions, compared to the screw without preload. Calculated deflections and strains at the hold-down springs using the finite element analysis were in very close agreements with the experimentally measureddeflections and strains. Primary water stress corrosion cracking (PWSCC) life of the Inconel 600 screw was predicted by integrating the Scott’s model and resulted in a life of 1.42years, which was fairly close to the field experience. Cracks were expected to originate at the threaded region of the screw and propagated to the opposite side of the spring, which was confirmed by the fractographic analysis of the fractured screws
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/50/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.297-300.1834.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    An Improved Hybrid Full-Field Stress Analysis of Circularly Perforated Plate by Photoelasticity and Finite Element Analysis (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 326-328 (Dec. 2006), p. 1209-1212 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: hybrid experimental-numerical method is presented for determining the stresses around acircular hole in a finite-width, tensile loaded plate. Calculated fringes obtained by FEA provided theinformation about the external boundary of the hybrid element, and those fringes on straight lineswere used for hybrid analysis. In order to see the effects of varying stress field, different numbers ofterms in a power-series representation of the complex type stress function were tested. Actual andreconstructed fringes were compared. The hybrid results were highly comparable with those predictedby FEA. The result showed that this approach is effective and promising because isochromatic dataalong the straight lines in photoelasticity can be conveniently measured by use of phase shiftingphotoelasticity
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.326-328.1209.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...