繰返し衝撃引張荷重に対するエポキシ樹脂注形材の衝撃疲労強度とその信頼性(<小特集>信頼性工学小特集)

概要

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The impact tensile fatigue tests were conducted on alumina and silica filler reinforced epoxy resin castings. From the experiments, the properties of these resin castings under repeated impact tensile loads were clarified and the scatter properties of their strength were statistically analyzed. Safety factors and allowable stresses for resin castings under service impact tensile loading were studied on the basis of failure probability theory. The results were as follows: (1) The fatigue tensile strength σ_t of resin castings subjected to repeated impact tensile loading shows a scatter of logarithmic normal distribution and can be estimated statistically by the following formula. σ_tN_f^mt=ξD_tμ_tS_t^u where M_t and D_t are the parameters of impact fatigue properties, N_f is the life to failure, μ^^^_t and S_t are statistical values and μis the parameter of probability. (2) The strength constant D_t is closely related to the static tensile strength σ_B, and it can be estimated from the latter. (3) The safety factor and the allowable stress of these resin castings under service impact loads can be determined according to the expectative failure probability. It is useful for the most suitable structural design.
社団法人日本材料学会の論文
1984-01-15