Blowup for nonlinearly damped viscoelastic equations with logarithmic source and delay terms

Abstract In this work, we investigate blowup phenomena for nonlinearly damped viscoelastic equations with logarithmic source effect and time delay in the velocity. Owing to nonlinear damping term instead of strong or linear dissipation, cannot apply concavity method introduced by Levine. Thus, utilizing energy method, show that solutions not only non-positive initial but also some positive blow up at a finite point time.