High-Speed maging of Hypervelocity Microparticle Impact

User Benefits

- High-speed video camera HPV-X2 enables high-speed imaging of up to 10 Mfps/sec. - It can image the flight behavior of microparticles, from several to several tens of μm, in high resolution.

Introduction

The macroscopic plastic deformation of metals and polymer materials is known to depend on the strain rate. This is because it greatly depends on the local deformation behavior of the microscopic structure of materials. Although the plastic deformation behavior in the ultra-high strain rate range of polymer materials is particularly rate-dependent, it has not been clarified. Therefore, a mechanical investigation is considered to be important in the development of lightweight and shock-resistant materials. For this reason, the Laser-Induced Particle Impact Test (LIPIT) was developed to achieve high- speed flight and impact experiments of micro-nanoparticles. In addition, the use of the high-speed video camera Hyper Vision HPV-X2, which has recording speeds of up to 10 Mfps/sec, enabled detailed observations of microparticle flight and collision behavior in LIPIT. This article describes how a high-speed video camera was used to image the high-speed flight and collision of microparticles. First, impact experiments were conducted on polymer materials using various kinds of particles to investigate the shape of impact marks using LIPIT. Then nanoscale analysis was performed on high-speed collision phenomena using the coarse-grained molecular dynamics method and discussed the mechanism of plastic deformation behavior from the viewpoint of molecular chain deformation.

1 de agosto de 2023 GMT