Standoff-mortar fragment velocity characterization before and after perforating conventional building walls

In this work, analytical models are developed to predict mortar-induced impact and residual velocities of case fragments upon interaction with typical building walls. Theoretical models are experimentally verified and the intervening parameters identified. Multiple common structural wall materials are implemented in the experimental verification of statistical models: steel siding, wood studs, concrete masonry units, and solid brick panels. Examples of application lead to the construction of risk curves representing the probability of exceeding a specified threshold value of the residual fragment velocity upon wall perforation.