Sze-Dai Pang

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In mechanical design as well as protection from various natural hazards, one must ensure an extremely low failure probability such as 10(-6). How to achieve that goal is adequately understood only for the limiting cases of brittle or ductile structures. Here we present a theory to do that for the transitional class of quasibrittle structures, having brittle(More)
Because the uncertainty in current empirical safety factors for structural strength is far larger than the relative errors of structural analysis, improvements in statistics offer great promise. One improvement, proposed here, is that, for quasibrittle structures of positive geometry, the understrength factors for structural safety cannot be constant but(More)
The paper presents a model that extends the stochastic finite element method to the modelling of transitional energetic–statistical size effect in unnotched quasibrittle structures of positive geometry (i.e. failing at the start of macro-crack growth), and to the low probability tail of structural strength distribution, important for safe design. For small(More)
It is argued that, in probabilistic estimates of quasibrittle structure strength, the strength threshold should be considered to be zero and the distribution to be transitional between Gaussian and Weibullian. The strength histograms recently measured on tough ceramics and other quasibrittle materials, which have been thought to imply a Weibull distribution(More)
THE STRUCTURAl ENGINEERING CONVENTION (SEC 2005) INDIAN INSTITUTE OF SCIENCE, BAto!GALORE 560 012,INDIA (DEC 14-16,2(05) D. ROY AND 1. M. CHANDRA KISHEN, EDS. EFFECT OF SIZE ON SAFETY FACTORS AND STRENGTH OF QUASIBRITTLE STRUCTURES: BECKONING REFORM OF RELIABILITY CONCEPTS Zdenek P. Bazant l and Sze-Dai Pang The effect of structure size D on structural(More)
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