Megumi Higashide

• PhD Student at Sapporo Medical University

Space debris is increasing by development of the space environment. The impact of space debris with the International Space Station is considered to be questionable. The model of the space environment is made as one example of the measures. However, the modeling error of the ejecta has been focused recently. It is necessary to do the evaluation exa...

The purpose of this study is to obtain mass, spray angle and velocity distributions of fragments in debris cloud generated by oblique impacts on an aluminum alloy plate. Hypervelocity impact tests were performed with a two-stage light gas gun at Kyushu Institute of Technology. The impact angles were changed to 0°, 15°, 30°, 45° and 60°. The project...

In this study, mass and velocity distributions of fragments in debris cloud were investigated on oblique impact tests. In order to obtain the mass distribution, the fragments were captured in a stack of polystyrene sheets installed behind the target. The velocity distribution of the fragments was calculated by newly developed method which the veloc...

We have developed measurement system of fragment distribution after hypervelocity impact so far. In this paper, we tried to improve accuracy of fragment distribution by increasing the number of control points in Direct Linear Transformation Method, and successfully applied this to oblique impact tests.

We have measured debris cloud generated by oblique impact. And in order to evaluate effect of oblique impact of aluminum spheres against a thin laminated target, hypervelocity impact test have been conducted. Impact velocity was approximately 2km/s. Impact angle was 0[deg] and 30[deg]. The experiments were performed to take images of the generated...