Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Powiadomienia systemowe

Sesja wygasła!
Sesja wygasła!
Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: cykl zmęczenia

Sortuj według:

Ogranicz wyniki do:

Evaluation of Physical and Mechanical Properties of Cotton Warps Under a Cyclic Load of Stretch-Abrasion

Guo Min, Liu Jianli, Zhu Bo, Gao Weidong

Autex Research Journal

2022

Vol. 22, no. 1

135--141

The fatigue behavior of cotton warps was studied by a newly weaving load simulator (WLS) developed in our laboratory. Reborn hairiness, strength retention, and elongation retention of sized warps were adopted to evaluate the physical and mechanical properties of sized warps under stretch-abrasion cyclic loading. The influences of different fatigue cycles on the above three indicators were also discussed. The results indicated that the fatigue behavior of the cotton warps accompanied by abrasion yields a three-parameter Weibull distribution. All the fitting plots show acceptable linearity. Moreover, there is a strong relationship of quadratic polynomial between the tensile properties and the fatigue cycle of the sized warps according to the scatter fitting (R2 > 91.08%). Similarly, there is also a good relationship of quadratic polynomial between the reborn hairiness index and the fatigue cycle of the sized warps (R2 > 94.51%). Finally, regardless of the strength retention, elongation retention, and reborn hairiness, the physical and mechanical properties of the cotton warps still change with the continuous increase of the fatigue cycle after 40% of the fatigue cycle, but it is not significant. The research was helpful to estimate the capacity of the warps to sustain failure.

Computational model of processes in the contact area of two cylinders with different diameters taking into account the actual material structure

Podruh J.

International Journal of Applied Mechanics and Engineering

2010

Vol. 15, no 2

503-510

The real material structure taken from a railway wheel was loaded on a test equipment to find its stress-strain characteristic. The determined material variables were verified in the quoted computation. This paper presents results from the analysis with cyclic loading of two wheels with different diameters which are in mutual contact. The target of this research is to simulate by computational methods the low-cycle fatigue approved by metallurgical analyses.