Integrated Diagnostic Analysis of Ejecta from Lead with Micro-Defects under Detonation Loading

Dasen Xu^*Huaipu KangLiang QiaoHaoyu ChenTiegang TangGuowu Ren^*Yongtao Chen^*

• Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, China

This study represents a significant advancement in ejecta diagnostics under explosive conditions by combining photonic Doppler velocimetry (PDV), an improved Asay-F window, and high-speed X-ray imaging. Accurate measurement of both high-density and low-density ejecta has long been a challenge in metal fragmentation studies, especially for low-melting-point metals like lead. Traditional diagnostic methods often face issues such as insufficient spatial resolution or interference effects, limiting their effectiveness. By integrating PDV, X-ray, and Asay window diagnostics, this work provides a comprehensive solution to accurately capture ejecta behavior, revealing detailed fragmentation dynamics previously inaccessible to single-method approaches.The originality of this approach lies in its ability to synergistically use complementary diagnostics, providing robust data for understanding ejecta dynamics across different density levels. The study contributes critically to the validation of metal dynamic failure models, offering new insights that are essential for applications in high-strain-rate scenarios, including aerospace, defense, and protective material design. The findings set a new benchmark for experimental methodologies in shock-induced material fragmentation, significantly advancing the capabilities in material science and improving our ability to design materials for extreme conditions.