Morphological parameters of both surfaces of coupled joint

Abstract

Twenty one joints were made with Brazilian tests and each surface was scanned by the Talysurf CLI 2000. Morphological characteristics of joint surface were quantified by statistical and textural parameters. By the contrast of these parameters between both sides of each coupled joint, the following conclusions are drawn. The upper and lower surfaces of coupled joints have approximately equal values of S_p(maximum height of joint surface), S_a(arithmetic mean height of joint surface) and S_q(root mean square height of joint surface), but the S_sk(skewness of the height distribution of joint surface) values of the two surfaces of a coupled joint are different, one is positive while the other is negative. The S_al(auto-correlation length) parameter values of both surfaces of each coupled joint are quite close, and the S_tr(texture aspect ratio) values have the same situation to the S_al parameter, but the same parameters of different surfaces have big differences which illustrates its own characteristics of each joint. The two surfaces of each coupled joint have similar values of

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(mean profile angle) which can be used to deduce the value of

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each other.

Keywords

coupled joint / morphology / statistical parameter / textural parameter / profile mean angle / envelop area

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