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 Wysłany: Czw 20:46, 23 Gru 2010 Temat postu: ugg milano U-shaped notch three-point beam bending |
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U-shaped notch three-point bending beam of the stress concentration factor
If not consider the stress concentration with the common methods and applications of mechanics of materials stress intensity factor of the results of fracture mechanics methods were compared (Table 2, Table 3); 4) [7] Figure l2 shows a bend specimen of granite The experimental results, the non-dimensional notch width is 2r / h = 3 / 30 = 0.1,3 kinds of samples were non-dimensional notch depth a = a / h = 0.1,0.3,0. 5, to test the maximum load,[link widoczny dla zalogowanych], deflection under maximum load = 0.1, respectively, dimensionless value of the base shown in Table 4, compared with the value of this test is not difficult to find value and deviation of the theoretical prediction only a few percent, indicating that this prediction has a good accuracy. Table 4 with the theoretical prediction [7] Comparison of the experimental Tab. 4AcomparisonofvaluesfromtheoreticalpredictionofpresentpaperandexperimentofReL [7] References: Note: The non-dimensional notch width 2r / h = 0.1, P1,[link widoczny dla zalogowanych], and 6i is Ot1 = 0.1 when the maximum load and deflection [1] West Tianzheng Xiao. Stress concentration [M]. Li, stability, and so translated. Beijing: Mechanical Industry Press, 1986. [2] Peterson RE. Stress concentration factor [M]. Yang Lemin, such as translation. Beijing: National Defence Industry Press, 1988. [3] ComesCJ, TmyaniN, MorilloC, eta1. TheoreticalstressconcentrationfactorsforshortflattensionbarswithoppositeU-shapednotches [J]. JournalofStrainAnalysis,[link widoczny dla zalogowanych], 2005,40 (4) :345-355. [4] WangQizhi. Hish-accuracyexpressionsofstressconccntra-tionfactorandstressimensityfactorinfinitedomains [J]. JournalofMechanicalStrength, 2001,23 (3) :358-361. [ROCK. High stress concentration factor in a finite field and stress intensity factor expression [J]. Mechanical Strength, 2001,23 (3) :358-361. ] [5] WangQizhi, SongXiaolin. Expressionsofstressconccntra-t; 0nfactotsfor8neccentriccircularholeinatensi0northo. tropicfinite-widthstrip [J]. ActaMateriaeCompositaeSini-ca, 2003,20 (6) :80-86. [ROCK Song Xiaolin. Finite Width tensile orthotropic stress concentration factor of the eccentric hole expression [J]. Composite Materials, 2003,[link widoczny dla zalogowanych],20 (6) :80-86. ] [6] WangQizhi, WangKun. Ma�� ��im black loadanditsdeflectionandstiffnessforthree-pointbendingspecimensofbrittlenla-terial [J]. JournalofSichuanUniversity: EngineeringSei. enceEdition, 2005,37 (6) :1-5. [ROCK Wang Kun. Bending specimens of brittle materials, the maximum load and deflection and stiffness [J]. Sichuan University: Engineering Science,[link widoczny dla zalogowanych], 2005,37 (6) :1-5. ] [7] QiuFeng, DingHua. Elementsplittingtechniqueindis. continuousfiniteelementmethod [J]. MechanicsinEIlgi-neering, 2006,28 (4) :54-59. [Qiu Feng, Ding Hua. Unit functions with discontinuous finite element method [J]. Mechanics and Practice, 2006,28 (4) :54-59. ] Editorial Qiong)
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