This paper is devoted to investigating the initial boundary value problem for a semilinear wave equation with strong damping and scattering damping on an exterior domain. By introducing suitable multipliers and applying the test-function technique together with an iteration method, we derive the blow-up dynamics and an upper-bound lifespan estimate of the solution to the problem with power-type nonlinearity $|u|^{p}$
|
u
|
p
, derivative-type nonlinearity $|u_{t}|^{p}$
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u
t
|
p
, and combined type nonlinearities $|u_{t}|^{p}+|u|^{q}$
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u
t
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p
+
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u
|
q
in the scattering case, respectively. The novelty of the present paper is that we establish the upper-bound lifespan estimate of the solution to the problem with strong damping and scattering damping, which are associated with the well-known Strauss exponent and Glassey exponent.