冷間模擬実験によるれんがのき裂発生条件の検討

概要

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A cold model test was made to simulate a crack behavior of cylindrical refractory structure. In the test, high-alumina (Al_2O_3 90%) rectangular prism bricks were used. Strain was induced by mechanical loading. Srain state was simulated to that of bricks in a cylindrical furnace in which thermal expansion of refractories are constrained by shell. Y-directional strain state which was given to the bricks partially and varied linearly (maximum value ; ε_<yo>) corresponded to circumferential strain state of bricks of the furnace, and y-directional partial loading resulted in the tensile strain in x-direction (maximum value ; ε_<xm>) which corresponded to radial strain of bricks of the furnace. Also, three point bending test of square section bar and compressive test of cylinder were carried out to get tensile critical strain (ε_b^t and compressive one (ε_b^c). Results are summarized as follows : 1. Cracks may be caused by ε_<yo> and ε_<xm>. 2. Critical strain to cause cracks in cold model test, has good correlation with ε_b^t or ε_b^c.
社団法人日本鉄鋼協会の論文
1986-11-01