Results 201 to 210 of about 14,459 (265)
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Weibull modulus and fracture strength of highly porous hydroxyapatite
Journal of the Mechanical Behavior of Biomedical Materials, 2013Porous hydroxyapatite (HA) is used in a variety of applications including biomedical materials such as engineered bone materials and microbe filters. Despite the utility of the Weibull modulus, m, as a gauge of the mechanical reliability of brittle solids, there have been very few studies of m for porous HA.
X, Fan +3 more
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Unbiased Weibull Modulus Estimation Using Differential Cumulative Entropy
Communications in Statistics - Simulation and Computation, 2012Recently, Liu (2007) defined a new entropy which measures the distance between a prescribed and an empirical survival function. In this article, we use this measure called Differential Cumulative Entropy (DCE) for Weibull parameters estimation. We show that the DCE method provides biased estimations of the Weibull modulus, but utilizing unbiasing ...
GH. Yari, A. Saghafi
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Comments on ?on estimating the Weibull modulus for a brittle material?
Journal of Materials Science, 1982 P. Kittl, O. G�nther
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On estimating the Weibull modulus for a brittle material
Journal of Materials Science, 1979Common methods of estimating the Weibull modulus are surveyed. Computer simulation is used to obtain the statistical properties of different estimators. Most estimators are shown to be biased and their respective adjustment factors, for a range of experimentally feasible sample sizes, are given.
K. Trustrum, A. De S. Jayatilaka
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On estimating Weibull modulus by the linear regression method
Journal of Materials Science, 2007Statistical models were developed to estimate the bias of the shape parameter of a 2-parameter Weibull distribution where the shape parameter was estimated using a linear regression. These models were formulated for 27 sample sizes from 5 to 100 and for 35 probability estimators,
Murat Tiryakioğlu, David Hudak
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Weibull distribution application on temperature dependence of polyurethane storage modulus
International Journal of Materials Research, 2016Abstract In this paper, a stiffness–temperature model based on Weibull statistics was applied to quantitatively describe changes in the storage modulus of thermoplastic polyurethane over a wide range of temperature. The variation of the storage modulus with temperature was obtained from dynamic mechanical analysis tests across transition
Ivan Kopal +5 more
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On the estimation of the Weibull modulus
Journal of Materials Science Letters, 1984It is well documented that nominally identical specimens of brittle materials, e.g. ceramics, show a large variation of tensile fracture stresses and in order to use brittle materials as engineering materials the strength has to be characterized. The most widely used expression for characterization is the cumulative distribution function proposed by ...
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Influence of toughness on Weibull modulus of ceramic bending strength
Journal of Materials Research, 1986It is demonstrated both theoretically and experimentally that fracture toughness does not directly influence the Weibull modulus of ceramic bending strength for materials that obey the Griffith criterion for crack propagation. Weibull modulus remains unchanged as toughness is increased.
K. Kendall +3 more
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Influence of experimental parameters on the estimated value of Weibull's modulus
Journal of Materials Science, 1999This paper is devoted to the study of the influence of experimental parameters and calculation hypotheses on the estimated value of Weibull's modulus, m, of structural ceramics. Numerical simulation programs have been written and rupture tests have been performed in order to characterize the role of the number of samples tested and thus of the ...
J. Absi, P. Fournier, J. C. Glandus
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Approach to the Weibull modulus based on fractal fragmentation of particles
Powder Technology, 2016Abstract Particle fragmentation results in a fractal distribution of progeny fragments. Based on the fractal distribution, a statistical approach is proposed to interpret the scaling characteristics in tensile strength of brittle particles. It is found that the relationship between the cumulative survival probability of the particles and the tensile ...
Yongfu Xu, Danqing Song, Feifei Chu
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