高温下におけるB/Al複合材料強度の統計的性質

概要

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Tensile tests of a l0vol% boron-aluminum composite were carried out at room temperature, 150℃ and 300℃, in order to investigate the validity of the finite-element-method (FEM) simulation proposed in the previous report, which evaluates the tensile strength of fiber-reinforced metals. The average strengths of the simulated result were in good agreement with those of the experimental result, although the range of the variability in strength was somewhat underestimated. The stress distributions on the fibers around a broken fiber were estimated by FEM analysis, by taking into account the matrix constitutive equation at the elevated temperatures. Then, the relation between the stress distributions and the statistical properties of strength obtained in the experiment and simulation were discussed, using the probabilistic model based on the Markov chain. It was pointed out that, consequently, the statistical properties of room temperature are maintained to some degree at elevated temperatures. Additionally, the effect of the thermal stress occurring in the composite on the tensile strength was also investigated.
一般社団法人日本機械学会の論文
1994-06-25