Variation in strength and creep life of six Japanese rocks

摘要: Abstract In this paper, variations in strength and creep life are investigated for rocks under various conditions: dry wet, uniaxial triaxial, compressional tensile. A number of parameters introduced purpose; to assess the time-dependent failure constant monotonic loading following used: parameter time dependency δ , coefficient α β. explains rate or stress level life. β related each other. Variations have been evaluated using data from previous experiments. It is confirmed here that determined by tests most cases identical those tests. Variation wet condition almost same as condition; however, variation tension increases more than compression. Under confining pressure, reduced Neogene sedimentary rocks, does not appear change igneous rock welded tuff.