Evaluation of Creep Curves from the Process of Dynamic Compression

Abstract

To analyze the process of dynamic compression, especially in tabletting, a new methodof drawing curves that corresponds to the normal creep curve in the static compressionprocess was devised.The creep curve obtained by this method can be expressed usingviscoelastic three elements model like E=(P/γ₁)^m+(P/γ₂)ⁿ·[1-exp(-t/τ)], where E is cornpressionstrain, P, compressed force, t, time, τ, retardation time and γ₁, γ₂, m, n are constants. This equation can also be treated as in the case of normal creep equation.