A new validation test of the constitutive equations: Cylindrical implosion from explosive

Abstract
The validation of constitutive equations currently based on the expansion of a sphere or the test of Taylor is difficult to obtain for fragile materials, which are fractured in traction for weak deformations. So, to overcome this shortcoming, we have developed a new validation test: the implosion of an explosive-loaded cylinder. After validation of the experimental setup on TA6V4 presented in a previous publication and various technological developments, the implosion of a beryllium cylinder has been completed. The velocity of a conical beryllium sample is measured using DLI techniques. This paper presents experimental results and compares the experimental velocity with numerical simulations carried out with different laws of behavior to validate models. The results indicate that deformations close to 45% were thus obtained.