硬さが異なる鋼材間の摩擦係数に関する基礎的研究

概要

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For developing high-strength bolted friction joints with much higher friction coefficients than conventional ones, friction mechanisms are studied first and then based on the mechanisms, conditions for realizing high friction coefficients should be clarified. Friction coefficients between steels with different hardness are discussed in this paper. First, failure modes on the friction surface are examined theoretically and a new friction theory is established. This theory provides that friction coefficients depend on the following factors : shapes and angles of surface projection of the steel with higher hardness, hardness ratio of harder steel to softer one and stress ratio of compression stress on friction surface to tensile strength of softer steel. A friction coefficient of 1.2 becomes possible from the new provided friction theory. Second, slip tests are conducted by changing the factors mentioned above. The results of these tests show that the theoretical consideration is true. Actual friction coefficients of more than 1.2 and slip coefficients of more than 1.0 are provided if specimens meet the theoretical conditions for achieving high friction coefficients.
社団法人日本建築学会の論文
1997-04-30