Zobrazeno 1 - 10
of 141
pro vyhledávání: '"H. Ruppersberg"'
Autor:
H. Ruppersberg
Publikováno v:
Materials Science and Engineering: A. 424:212-222
The stress σ i j I inside spherical and oblate inclusions (“I”) is calculated as a function of Young's modulus EM and Poisson's ratio νM of the enclosing infinite isotropic matrix (“M”), which is subjected to an uniaxial tension σ 11 M .
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::072bb71b7a9716d5b191908f6226c4b2
https://doi.org/10.1016/j.msea.2006.03.016
https://doi.org/10.1016/j.msea.2006.03.016
Autor:
H. Ruppersberg
Publikováno v:
Materials Science and Engineering: A. 363:107-115
For completing previous work on thermoelastic stresses in white cast iron, micromechanical calculations were performed of the elastic behavior of spherical and lamellar ferrite crystals which are embedded in an elastically isotropic matrix. The X-ray
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80fb488e77bbc726f9e3121f7d11065d
https://doi.org/10.1016/s0921-5093(03)00591-4
https://doi.org/10.1016/s0921-5093(03)00591-4
Autor:
S. Hartmann, H. Ruppersberg
Publikováno v:
Materials Science and Engineering: A. 325:414-423
White cast iron consists of the two phases ferrite and cementite. On cooling, strong thermoelastic stresses Δ σ ij occur which-because of equilibrium conditions-have different signs in the two phases. According to the sin 2 ψ -law of conventional
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::122f4417573991291e1feb18a64481a4
https://doi.org/10.1016/s0921-5093(01)01465-4
https://doi.org/10.1016/s0921-5093(01)01465-4
Autor:
H. Ruppersberg
Publikováno v:
Materials Science and Engineering: A. 224:61-68
Recently we analyzed by X-ray diffraction the triaxial thermoelastic stresses in white cast iron. The transition to the biaxial stress field in the surface region of the polyphase specimen was now studied using synchrotron radiation. In order to unde
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7b877959ffde9fdee2ef1d2bc5f55bd
https://doi.org/10.1016/s0921-5093(96)10564-5
https://doi.org/10.1016/s0921-5093(96)10564-5
Autor:
H. Ruppersberg, S. Hartmann
Publikováno v:
Materials Science and Engineering: A. 208:139-142
The temperature derivatives of the thermoelastic stresses have different signs in the two phases of white cast iron. We observed however that the slopes of the corresponding d (sin 2 ψ ) curves vary with temperature in the same direction. This seems
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1d0ab0cfeb458df4d41a22c05b5ed80
https://doi.org/10.1016/0921-5093(95)10066-0
https://doi.org/10.1016/0921-5093(95)10066-0
Autor:
H. Ruppersberg, S. Hartmann
Publikováno v:
Materials Science and Engineering: A. 190:231-239
With X-ray diffraction the three microscopic differential thermal expansion coefficients of pure cementite were determined with high precision in the temperature range 30–320 °C. These data were used to calculate the average three-axial thermoelas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::377d479c9daa63deac9e2c40f07899ca
https://doi.org/10.1016/0921-5093(94)09616-5
https://doi.org/10.1016/0921-5093(94)09616-5
Publikováno v:
Journal of Physics: Condensed Matter. 6:321-326
Liquid Li/Na exhibits a miscibility gap with a critical temperature Tc=577+or-1 K and a critical composition chi c=36+or-1.5 at.% Na. At temperatures up to about 900 K we observed for the single-phase liquids an ideal behaviour of the molar volume wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9000da8968cc832b5d1991ca37da228
https://doi.org/10.1088/0953-8984/6/2/004
https://doi.org/10.1088/0953-8984/6/2/004
Autor:
H. Ruppersberg, I. Detemple
Publikováno v:
Materials Science and Engineering: A. 161:41-44
We show that energy-dispersive X-ray diffraction is a very powerful tool for the investigation of complex stress fields which occur in the surface region of polycrystalline materials after plastic deformation. The interplanar spacings of 11 lattice p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6fcced80567148c170e0c02880828f2
https://doi.org/10.1016/0921-5093(93)90473-r
https://doi.org/10.1016/0921-5093(93)90473-r
Autor:
H. Ruppersberg
Publikováno v:
Advances in X-ray Analysis. 37:235-244
Conventional X-ray stress analysis is based on the so called "linear sin2ψ" law and yields average two axial stresses in the irradiated surface layer of polycrystalline specimens. Three examples are given in this paper where either strong deviations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0e5898aaf296bfd551ad4ad0ee53557
https://doi.org/10.1154/s0376030800015743
https://doi.org/10.1154/s0376030800015743
Autor:
I. Detempte, H. Ruppersberg
Publikováno v:
Advances in X-ray Analysis. 37:245-251
A formalism which was proposed by Ruppersberg (1992) for a self consistent evaluation of stress gradients in the case of strongly varying σ33(T) stresses is applied for studying the variation of the stress components with distance z from the irradia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75ff9b76cbb306876348e54f45575309
https://doi.org/10.1154/s0376030800015755
https://doi.org/10.1154/s0376030800015755