This research aims to contribute to the safe methodology for additive manufacturing(AM)of energetic materials.Coating formulation processes were investigated and evaluated to find a suitable method that may enable sel...This research aims to contribute to the safe methodology for additive manufacturing(AM)of energetic materials.Coating formulation processes were investigated and evaluated to find a suitable method that may enable selective laser sintering(SLS)as the safe method for fabrication of high explosive(HE)compositions.For safety and co nvenie nce reasons,the co ncept demonstration was conducted using inert explosive simulants with properties quasi-similar to the real HE.Coating processes for simulant RDXbased microparticles by means of PCL and 3,4,5-trimethoxybenzaldehyde(as TNT simulant)are reported.These processes were evaluated for uniformity of coating the HE inert simulant particles with binder materials to facilitate the SLS as the adequate binding and fabrication method.Suspension system and single emulsion methods gave required particle near spherical morphology,size and uniform coating.The suspension process appears to be suitable for the SLS of HE mocks and potential formulation methods for active HE composites.The density is estimated to be comparable with the current HE compositions and plastic bonded explosives(PBXs)such as C4 and PE4,produced from traditional methods.The formulation method developed and understanding of the science behind the processes paves the way toward safe SLS of the active HE compositions and may open avenues for further research and development of munitions of the future.展开更多
本文针对海底管道的特殊性,以DNV OS F101和API Spec 5L作为基本技术标准,通过对管道的主要性能指标和尺寸公差进行分析考虑,总结出海底管道的管材选用原则;根据DNV OS F101的相关补充要求,并结合荔湾3-1项目的深水管材选用情况,从厚径...本文针对海底管道的特殊性,以DNV OS F101和API Spec 5L作为基本技术标准,通过对管道的主要性能指标和尺寸公差进行分析考虑,总结出海底管道的管材选用原则;根据DNV OS F101的相关补充要求,并结合荔湾3-1项目的深水管材选用情况,从厚径比、止裂韧性和塑性变形方面提出深水海底管道的管材选用建议。展开更多
基金funded by the Council for Scientific and Industrial Research(CSIR)。
文摘This research aims to contribute to the safe methodology for additive manufacturing(AM)of energetic materials.Coating formulation processes were investigated and evaluated to find a suitable method that may enable selective laser sintering(SLS)as the safe method for fabrication of high explosive(HE)compositions.For safety and co nvenie nce reasons,the co ncept demonstration was conducted using inert explosive simulants with properties quasi-similar to the real HE.Coating processes for simulant RDXbased microparticles by means of PCL and 3,4,5-trimethoxybenzaldehyde(as TNT simulant)are reported.These processes were evaluated for uniformity of coating the HE inert simulant particles with binder materials to facilitate the SLS as the adequate binding and fabrication method.Suspension system and single emulsion methods gave required particle near spherical morphology,size and uniform coating.The suspension process appears to be suitable for the SLS of HE mocks and potential formulation methods for active HE composites.The density is estimated to be comparable with the current HE compositions and plastic bonded explosives(PBXs)such as C4 and PE4,produced from traditional methods.The formulation method developed and understanding of the science behind the processes paves the way toward safe SLS of the active HE compositions and may open avenues for further research and development of munitions of the future.
文摘本文针对海底管道的特殊性,以DNV OS F101和API Spec 5L作为基本技术标准,通过对管道的主要性能指标和尺寸公差进行分析考虑,总结出海底管道的管材选用原则;根据DNV OS F101的相关补充要求,并结合荔湾3-1项目的深水管材选用情况,从厚径比、止裂韧性和塑性变形方面提出深水海底管道的管材选用建议。
