To evaluate the response of concrete structures subjected to impact or impulsive loading, it is essential to know how cracks propagate under such dynamic loading conditions. Single-edge notched beams were subjected to varying rates of loading to establish the stress intensity factor K//1 versus crack velocity V relationship for mortar and concrete. Impact tests were performed using a modified instrumented Charpy test system. During loading, the rate of crack growth was obtained using special brittle Krak gages. Results indicate the following: (1) For a given strain rate the extent of pre-peak crack growth is larger for concrete than for mortar, (2) Decrease in pre-peak nonlinearity at higher strain rates is probably caused by the decrease in amount of slow (LEFM) approach at high rates may be valid.
|Original language||English (US)|
|Number of pages||9|
|Journal||Cement, Concrete and Aggregates|
|State||Published - Jun 1 1986|
ASJC Scopus subject areas
- Building and Construction
- Materials Science(all)