Temat: random stress - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Fatigue "safe-life" criterion for metal elements under multiaxial static and dynamic random loads
Autorzy:: Kolenda, J.
Powiązania:: https://bibliotekanauki.pl/articles/259229.pdf
Data publikacji:: 2004
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: design criteria
multiaxial loading
random stress
mean stress effect
Opis:: Random stress with Cartesian components of known statistical moments of their mean values and power spectral densities of stochastic stress processes is considered. To accoŹunt for the mean stress effect the generalised Soderberg criterion for ductile materials is employed. An equivalent stress with periodic (in the mean-square sense) components is defined by means of the equivalence conditions based on the average strain distortion energy. Also, is formulated the fatigue "safe-life" design criterion which covers the condiŹtions of both static strength and fatigue safety and includes yield strengths and fatigue limits which : have simple physical interpretation, can be determined by uniaxial tests, are directly related to the applied loads, and can reflect material anisotropy.
Źródło:: Polish Maritime Research; 2004, 3; 21-24
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: On the fatigue-critical amplitude of random-amplitude stress
Autorzy:: Kolenda, J.
Powiązania:: https://bibliotekanauki.pl/articles/260417.pdf
Data publikacji:: 2007
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: uniaxial load
random stress
high-cycle fatigue
failure probability
Opis:: Uniaxial non-zero mean stress of constant circular frequency in the high-cycle fatigue regime is considered. It is assumed that equation of the S-N curve and modified Soderberg equation are applicable. For constant-amplitude stress, the fatigue-critical stress amplitude is defined as that which leads to failure during the required design life. For random-amplitude stress, expected values of the fatigue-critical stress amplitude and total fatigue damage accumulated during the required design life are estimated. It is found that the probability of fatigue failure is equal to the probability of exceedance of the fatigue-critical stress amplitude. As an example, for stationary random stress the equivalent random-amplitude stress and probability of fatigue failure are determined.
Źródło:: Polish Maritime Research; 2007, 2; 9-11
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

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