| 抗爆缓冲材料动态力学特性及微观破裂分析 | |
| Alternative Title | Analysis of dynamic mechanical properties and microcosmic rupture of anti-explosion buffer materials |
吕祥锋 ; 潘一山; 肖晓春
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| Source Publication | 岩石力学与工程学报/CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING
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| 2012-05-15 | |
| Volume | 31Pages:2821-2828 |
| ISSN | 1000-6915 |
| Abstract | 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。 |
| Other Abstract | 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. |
| Keyword | 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 |
| Subject Area | 极端条件下的材料和结构 |
| URL | 查看原文 |
| Indexed By | CSCD ; EI |
| Language | 中文 |
| Funding Organization | 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) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/46468 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | 吕祥锋 |
| Recommended Citation 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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