Torsion
Mostrando 25-36 de 399 artigos, teses e dissertações.
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25. Calibration and evaluation of the Lemaitre damage model using axial- torsion fatigue tests on five engineering alloys
Abstract The Lemaitre damage model is evaluated using fatigue test data from five engineering alloys: 1045 steel, 16MnR steel, 7075-T651 Al alloy, extruded AZ61A Mg alloy, and extruded AZ31B Mg alloy. Tension-compression, torsion, proportional axial-torsion, and 90° out-of-phase axial-torsion loadings were investigated. The results show that the overall acc
Lat. Am. j. solids struct.. Publicado em: 22/10/2018
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26. Estudio de la formabilidad en caliente de aleaciones de titanio a través del ensayo de torsión y su aplicación a la optimización de procesos de forja y extrusión
ABSTRACT In the development of hot metal forming, the metallic products must comply with the requirements imposed by current standards. In some cases, the required microstructure can only be obtained through thermomechanical processing. With titanium and its alloys, small ranges of good workability are an additional difficulty. In this work the hot-workabili
Matéria (Rio J.). Publicado em: 19/07/2018
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27. Frozen-to-jamming-to-fluid Transition of Weakly Sheared Granular Systems by Low-frequency Mechanical Spectroscopy
Granular matter usually displays frozen, jamming and fluidized states when submitted to an external vibration with increasing intensity. The dissipation properties of granular systems with three different millimeter-size glass grains (0.1, 0.5 and 1.9 mm) have been investigated by a modified low-frequency inverted torsion pendulum under a shear strain and an
Mat. Res.. Publicado em: 10/07/2018
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28. Immunoexpression of vascular endothelial growth factor and B-cell lymphoma 2 in the uterine tissue of rats treated with melatonin in the estrus phase
Abstract Purpose: To investigate the effect of melatonin on uterine tissue in the ovariectomized rat model. Methods: Fourty Wistar albino rats were divided into four groups for histologic and immunohistochemical examination. The rats were first numbered randomly and then randomly divided into 4 equal groups: control (group 1), torsion (group 2), torsion+
Acta Cir. Bras.. Publicado em: 2018-07
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29. The protective effect of Papaverine and Alprostadil in rat testes after ischemia and reperfusion injury
ABSTRACT Objective: To investigate the effect of papaverine and alprostadil on testicular torsion-detorsion injury in rats. Materials and Methods: A total of 40 male Wistar-Albino rats were used in this study. Four hours of right testicular torsion was applied to each group, excluding sham oper- ated group. The torsion-detorsion (T/D), T/D + papaverine and
Int. braz j urol.. Publicado em: 2018-06
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30. Measurement of Strain-Amplitude Dependent Internal Friction with Torsion Pendulum and Vibration Reed Methods
In the traditional standard of internal friction measurement the torsion pendulum and vibration reed were preferentially recommended where the issue of strain amplitude dependence of internal friction was not concerned. To more precisely measure the internal friction and modulus at various strain amplitude, in this paper the strain amplitude dependence of in
Mat. Res.. Publicado em: 28/05/2018
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31. Experimental study of the neighborhood effects on the mean wind loading over two equivalent high-rise buildings
Abstract This paper presents a series of results with respect to the mean values of shear, base moment and torsion acting in a building obtained through an experimental wind tunnel study using the standard building proposed by the Commonwealth Advisory Aeronautical Research Council (CAARC) as building reference. In the loading determination, the interferenc
Lat. Am. j. solids struct.. Publicado em: 03/05/2018
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32. Bilateral testicular torsion in an adolescent: a case with challenging diagnosis
ABSTRACT Bilateral testicular torsion is a very uncommon emergency, with a challenging differential diagnosis. We describe the case of a 15-year-old patient with a left testicular torsion of 48 hours of duration and a sudden onset of right scrotum pain during his stay at the emergency area. Bilateral testicular torsion was diagnosed after repeat physical exa
Int. braz j urol.. Publicado em: 2018-04
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33. Investigation of the antioxidant effects of pheniramine maleate and nebivolol on testicular damage in rats with experimentally induced testis torsion
Abstract Purpose: To investigate the biochemical, histopathologic, and spermatogenetic changes in the detorsionated testicle after experimental torsion and to study the antioxidant effects of pheniramine maleate and nebivolol. Methods: Twenty-four Sprague-Dawley male rats were divided into 4 groups: Group 1: Sham; Group 2: Torsion/Detorsion (T/D); Group 3
Acta Cir. Bras.. Publicado em: 2018-02
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34. Systemic administration of curcumin nanoparticles protects ischemia-reperfusion injury in ovaries: An animal model study
Summary Objective: Ovarian torsion must be diagnosed and treated as early as possible. The aim of the present study was to investigate the effects of intraperitoneal administration of nanocurcumin on ischemia-reperfusion injury in ovaries. Method: Thirty-five (35) healthy female Wistar rats weighing approximately 250 g were randomized into seven experiment
Rev. Assoc. Med. Bras.. Publicado em: 2018-01
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35. Report of a rare case and review of adult intestinal duplication at the opposite side of mesenteric margin
ABSTRACT CONTEXT: To study the previously discovered clinical entity of adult intestinal duplication and its treatment, and propose an extension to its existing classification. CASE REPORT: We report the case of an adult male with abdominal pain, constipation and vomiting. This patient underwent surgical separation of adhesions, reduction of torsion and
Sao Paulo Med. J.. Publicado em: 07/12/2017
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36. Medical ozone therapy reduces oxidative stress and testicular damage in an experimental model of testicular torsion in rats
ABSTRACT Objective: Testicular torsion (TT) refers to rotation of the testis and twisting of the spermatic cord. TT results in ischemia-reperfusion (I/R) injury involving increased oxidative stress, inflammation and apoptosis, and can even lead to infertility. The aim of this study was to investigate the effect of ozone therapy on testicular damage due to I
Int. braz j urol.. Publicado em: 2017-12