成型压力对相似材料力学性质影响机理
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摘要
为探究成型压力对相似材料力学性质的影响机理,选择IBSCM新型相似材料,运用正交试验方法系统性的研究了成型压力和配比对相似材料密度、抗压强度、弹性模量、泊松比的影响;采用极差分析和多元回归分析等方法对结果进行了分析。结果表明:各因素对相似材料物理力学性质影响显著性由大到小依次为胶结剂浓度、成型压力、铁粉含量、石膏含量;胶结剂浓度对相似材料的抗压强度、弹性模量起控制作用;成型压力由2 MPa增大到6 MPa时,材料的密度、抗压强度、弹性模量分别增大了5. 97%,59. 1%,27. 5%,成型压力对相似材料力学性质影响较大,相似模拟实验中选择恰当的成型压力和配比是提高模拟实验相似性的关键;得到了成型压力和配比对相似材料力学参数影响的回归模型,并对模型的有效性进行了验证。
In order to explore the influence mechanism of molding pressure on the mechanical properties of similar materials,selecting a new type of IBSCM similar materials,and the influence of molding pressure and mixture proportion on the density,compressive strength,elastic modulus and Poisson's ratio of similar materials was systematically studied by the orthogonal test method. The results were analyzed by means of range analysis and multiple regression analysis,The results show that: The effects of various factors on the physical and mechanical properties of similar materials,in order,where adhesive concentration,molding pressure,iron powder content and gypsum content. The adhesive concentration controls the compressive strength and elastic modulus of similar materials; When the molding pressure increases from 2 MPa to 6 MPa,the density,compressive strength and modulus of elasticity of materials increase by5. 97%,59. 1%,and 27. 5% respectively. The molding pressure has a great influence on the mechanical properties of similar materials. Selecting the appropriate forming pressure and proportion in similar simulation experiments is the key to improving the similarity of simulation experiments. The regression model of the influence of molding pressure and proportion on mechanical parameters of similar materials is obtained,and the validity of the model is verified.
In order to explore the influence mechanism of molding pressure on the mechanical properties of similar materials,selecting a new type of IBSCM similar materials,and the influence of molding pressure and mixture proportion on the density,compressive strength,elastic modulus and Poisson's ratio of similar materials was systematically studied by the orthogonal test method. The results were analyzed by means of range analysis and multiple regression analysis,The results show that: The effects of various factors on the physical and mechanical properties of similar materials,in order,where adhesive concentration,molding pressure,iron powder content and gypsum content. The adhesive concentration controls the compressive strength and elastic modulus of similar materials; When the molding pressure increases from 2 MPa to 6 MPa,the density,compressive strength and modulus of elasticity of materials increase by5. 97%,59. 1%,and 27. 5% respectively. The molding pressure has a great influence on the mechanical properties of similar materials. Selecting the appropriate forming pressure and proportion in similar simulation experiments is the key to improving the similarity of simulation experiments. The regression model of the influence of molding pressure and proportion on mechanical parameters of similar materials is obtained,and the validity of the model is verified.
引文
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[2]顾金才,顾雷雨,陈安敏,等.深部开挖洞室围岩分层断裂破坏机制模型试验研究[J].岩石力学与工程学报,2008,27(3):433-438.GU Jin-cai,GU Lei-yu,CHEN An-min,et al. Model test study on mechanism of layered fracture within surrounding rock of tunnels in deep stratum[J]. Chinese Journal of Rock Mechanics and Engineering,2008,27(3):433-438.
[3]白占平,曹兰柱,白润才.相似材料配比的正交试验研究[J].露天采矿技术,1996,12(3):22-23.BAI Zhan-ping,CAO Lan-zhu. BAI Run-cai,Orthogonal test’s research on components of equivalent materials[J]. Opencast Mining Technology,1996,12(3):22-23.
[4]张绪涛,张强勇,曹冠华,等.成型压力对铁-晶-砂混合相似材料性质的影响[J].山东大学学报(工学版),2013,43(2):89-95.ZHANG Xu-tao,ZHANG Qiang-yong,CAO Guan-hua,et al. Effects on ironbarite-sand mixed similar material properties induced by molding pressure[J]. Journal of Shandong University(Engineering Science),2013,43(2):89-95.
[5]韩伯鲤,张文昌,杨存奋.新型地质力学模型材料(MIB)[J].武汉大学学报(工学版),1983,16(1):13-19.HAN Bo-li,ZHANG Wen-chang,YANG Cun-fen. A new model material of geo-machanics(MIB)[J]. Engineering Journal of Wuhan University,1983,16(1):13-19.
[6]马芳平,李仲奎,罗光福. NIOS模型材料及其在地质力学相似模型试验中的应用[J].水力发电学报,2004,23(1):48-51.MA Fang-ping,LI Zhong-kui,LUO Guang-fu. NIOS model material and its use in geo-mechanical similarity model test[J]. Journal of Hydroelectric Engineering,2004,23(1):48-51.
[7]王汉鹏,李术才,张强勇,等.新型地质力学模型试验相似材料的研制[J].岩石力学与工程学报,2006,25(9):1842-1847.WANG Han-peng,LI Shu-cai,ZHANG Qiang-yong,et al. Development of a new geomechanical similar material[J]. Chinese Journal of Rock Mechanics and Engineering,2006,25(9):1842-1847.
[8]张强勇,李术才,郭小红,等.铁晶砂胶结新型岩土相似材料的研制及其应用[J].岩土力学,2008,29(8):2126-2130.ZHANG Qiang-yong,LI Shu-cai,GUO Xiao-hong,et al.Research and development of new typed cementitious geotechnical similar material for iron crystal sand and its application[J]. Rock and Soil Mechanics,2008,29(8):2126-2130.
[9]袁宗盼,陈新民,袁媛,等.地质力学模型相似材料配比的正交试验研究[J].防灾减灾工程学报,2014,34(2):197-202.YUAN Zong-pan,CHEN Xin-min,YUAN Yuan,et al.Study on ratio of similar material of geomechanical model based on orthogonal test[J]. Journal of Disaster Prevention and Mitigation Engineering,2014,34(2):197-202.
[10]董金玉,杨继红,杨国香,等.基于正交设计的模型试验相似材料的配比试验研究[J].煤炭学报,2012,37(1):44-49.DONG Jin-yu,YANG Ji-hong,YANG Guo-xiang,et al.Research on similar material proportioning test of model test based on orthogonal design[J]. Journal of China Coal Society,2012,37(1):44-49.
[11]史小萌,刘保国,肖杰.水泥和石膏胶结相似材料配比的确定方法[J].岩土力学,2015,36(5):1357-1362.SHI Xiao-meng,LIU Bao-guo,XIAO Jie. A method for determining the ratio of similar materials with cement and plaster as bonding agents[J]. Rock and Soil Mechanics,2015,36(5):1357-1362.
[12] Sabnis G M,White R N. A gypsum mortar for smallscale models[J]. Aci Structural Journal,1967,64(11):767-774.
[13] Chen S,Wang H,Zhang J,et al. Experimental study on low-strength similar-material proportioning and properties for coal mining[J]. Advances in Materials Science and Engineering,2015,2015(3):1-6.
[14]方开泰,马长兴.正交与均匀试验设计[M].北京:科学出版社,2001.FANG Kai-tai,MA Chang-xing. Study of normal and even test[M]. Beijing:Science Press,2001.
[15]黄庆享,侯志成,张文忠,等.黏土隔水层相似材料胶结剂的正交实验分析[J].采矿与安全工程学报,2007,24(1):42-46.HUANG Qing-xiang,HOU Zhi-cheng,ZHANG Wenzhong,et al. Orthogonal tests on cementing agents of similar of clay aquiclude[J]. Journal of Mining&Safety Engineering,2007,24(1):42-46.
[16]刘振学,王力.实验设计与数据处理[M].北京:化学工业出版社,2015.LIU Zhen-xue,WANG Li. Experimental design and data processing[M]. Beijing:Chemical Industry Press,2015.
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