DYNAMIC STRENGTH OF SPHERICAL FIBERGLASS SHELLS UNDER INTERNAL EXPLOSIVE LOADING

In this article, we determined experimentally the response and made an estimate of the strength of fiberglass spherical shells 500 mm in dia meter of two types of winding under radial-symmetric internal explosiv e loading. The advantage of shells with a more uniform thickness (15-2 0 mm) of the load-carrying fiberglass layer is shown. On explosion of a charge involving an energy equivalent to 1.4 kg of TNT, this layer h as an approximately twofold strength factor. It is established that th e change from uniaxial (cylindrical shells) to biaxial strain in spher ical shells does not change the magnitude of total strain at failure.