Experimental and Simulation Study on Shielding Performance of Developed Hydrogenous Composites

Abstract

Space radiation has been well-known as the main health hazard to crews involved in manned space explorations. Two kinds of hydrogenous-rich composites are developed through compressing molding under high-temperature processing techniques for shielding space radiation. Beams of 80~400 MeV/n 12C of the Heavy Ion Research Facility in Lanzhou are used to test the shielding properties of the new composites. Experimental results show that the composite with more hydrogen content has higher shielding ability for 80 and 400 MeV/n 12C particles. Meanwhile, the addition of boron has no obvious effect on improving the shielding performance of the composite. Monte Carlo radiation transport codes were used to assess the shielding performance of composite in real space radiation. The simulation results show that hydrogenous-rich composite has significant advantage in space radiation shielding compared with traditional aluminum.

Free Vibrations of a New Three-Phase Composite Cylindrical Shell

“…It is noteworthy that the new three-phase composite structure with electrical conductivity can also have functionally graded (FG) characteristics by adjusting the GPLs distribution form, just like the new FG three-phase composite shell reinforced synergistically with GPLs and carbon fibers (studied in this paper), as shown in Figure 1. The new FG three-phase composite structure reinforced synergistically by GPLs and carbon fibers integrates the advantages of carbon fiber reinforced-composite structures and FG-reinforced composite structures, which is regarded as a multi-scale composite structure with significant practical value regarding engineering in aviation, aerospace, navigation, and other fields [9,10]. Although a large number of scholars have carried out in-depth research on the vibration characteristics of two-phase composite structures, such as carbon fiber-reinforced composite structures [11,12] and FG-reinforced composite structures [13][14][15], there are few studies on the vibrations of the new FG three-phase composite structure reinforced synergistically by GPLs and carbon fibers.…”

A General Framework for Material Properties Calculation and the Free Vibration Analysis of New Three-Phase Composite Cylindrical Shell Structures

“…As we all know, the composite structure has excellent mechanical properties, and it is widely used in aerospace, automotive, and defense fields [6]. The continuous fiberreinforced composite structure is one of the most common components in engineering.…”

Considerations for practical dose equivalent assessment of space radiation and exposure risk reduction in deep space

“…HZE particle exposure and dose reduction by shielding materials have been studied through calculations and measurements using ground accelerators e.g., Ref. 23 – 31 and in space modules e.g., Refs. 6 , 32 – 39 .…”