抗爆缓冲材料动态力学特性及微观破裂分析

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	抗爆缓冲材料动态力学特性及微观破裂分析
其他题名	Analysis of dynamic mechanical properties and microcosmic rupture of anti-explosion buffer materials
	吕祥锋; 潘一山; 肖晓春
发表期刊	岩石力学与工程学报/CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING
	2012-05-15
卷号	31 页码:2821-2828
ISSN	1000-6915
摘要	采用准静态、落锤冲击和分离式霍普金森压杆(SHPB)试验研究方法,借助电镜扫描(SEM)手段,对泡沫Al、Al-Si12基、Al-Si6基、泡沫Mg及Al–纤维和Al–稀土闭孔泡沫材料进行吸能特性试验研究,并讨论其微观破坏特征。准静态试验结果表明,基体材料不同,应力–应变曲线和吸能性能关系差异较大,抗压强度值最大为5 MPa左右。落锤冲击应力–应变和吸能特性试验结果说明,冲击载荷作用下材料抗压强度提高较大,最高可达15 MPa,吸能值最大达29 J。SHPB试验结果得出缓冲吸能性能良好的泡沫材料参数以密度为0.35～0.70 g/cm3,孔隙度为65%～87%,孔径为1.0～4.0 mm为宜。静态与冲击试验微观破坏结果均说明泡沫Al材料具有明显的撕裂痕迹,表现出韧性断裂特征。与准静态试验结果相比,冲击速度增大后,材料强度和吸能性能得到更好发挥,泡沫Al材料吸能值最大,变形空间较大,更适合用于防冲吸能支护材料。相似模拟试验结果表明,锚杆支护、U型钢支护巷道都存在不同程度的冲击变形或破坏,防冲支护巷道发生冲击后整体性较好。
其他摘要	The energy absorption property of closed-cell foam metals with matrix Al, matrix Al-Si12, matrix Al-Si6, matrix Mg, matrix Al-fiber and matrix RE-Al alloys are investigated by the compression, impact and split Hopkinson pressure bar(SHPB) test. And the micro-mechanics failure mechanism of closed-cell foam metals is discussed. Quasi-static experiment results show that the mechanical properties of different foam metals are different, and the maximum of compressive strength is about 5 MPa. Impact test results indicate that the maximum of compressive strength and absorbing energy value are about 15 MPa and 29 J, respectively. The closed-cell foam metals exhibit good energy-absorption ability on the optimal conditions that density is 0.35-0.70 g/cm3, porosity is 65%-87% and pore diameter is 1.0-4.0 mm. The micro-morphology of closed-cell foam metal with matrix Al is obvious tear trace, indicating that it has toughness characteristics. Compared with quasi-static experiment results, closed-cell foam metals with matrix Al is good for energy absorption materials because of its high absorbing energy value and deformation. Similar experimental results show that bolt and U steel support roadway have impact deformation or damage, and the blunt support roadway is better in integrity.
关键词	采矿工程闭孔泡沫金属材料动态力学特性吸能性能微观破裂形貌防冲支护
学科领域	极端条件下的材料和结构
URL	查看原文
收录类别	CSCD ; EI
语种	中文
项目资助者	国家重点基础研究发展计划(973)项目(2010CB226803); 国家自然科学基金面上项目(51174107); 中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金项目(SKLGDUEK1010)
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/46468
专题	流固耦合系统力学重点实验室
通讯作者	吕祥锋
推荐引用方式 GB/T 7714	吕祥锋,潘一山,肖晓春. 抗爆缓冲材料动态力学特性及微观破裂分析[J]. 岩石力学与工程学报/CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING,2012,31:2821-2828.
APA	吕祥锋,潘一山,&肖晓春.(2012).抗爆缓冲材料动态力学特性及微观破裂分析.岩石力学与工程学报/CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING,31,2821-2828.
MLA	吕祥锋,et al."抗爆缓冲材料动态力学特性及微观破裂分析".岩石力学与工程学报/CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING 31(2012):2821-2828.

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