激光冲击适张圆锯片振动模态的理论分析
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摘要
为了能兼顾计算效率与精度,基于非线性有限元理论,进行合理简化与假设,提出利用弹性热膨胀等效替代冲击区域塑性变形的方法,基于ABAQUS非线性有限元软件建立了集弹塑性和振动模态分析于一体的圆锯片激光冲击适张理论分析模型,获得圆锯片激光冲击适张后适张应力场和固有频率的仿真计算结果。利用静态应变采集仪和电阻应变花,测试圆锯片激光冲击适张后生成的适张应力场。通过与实测适张应力进行对比,验证了理论分析模型的正确性。理论计算结果表明:激光冲击适张能够使圆锯片外缘生成切向拉应力,提高圆锯片Nc=0,Nd≥2振动模态所对应的固有频率,可以有效提高圆锯片的动态稳定性。
To give consideration to both computational efficiency and accuracy,based on nonlinear finite element theory,with reasonable simplification and assumption,a method using elastic thermal expansion instead of plastic deformation in shock zone was proposed,and a theoretical analysis model of laser shock of circular saw blade was established by ABAQUS software,which combined elasto-plastic and vibration mode analysis. Tensioning stress and natural frequency of circular saw blade after laser shock tensioning process were calculated by this model. Tensioning stress of circular saw blade after laser shock tensioning process was tested by static strain gauge and resistance strain acquisition. By comparing theoretical analysis and measured results of tensioning stress,the correction of the theoretical model was proved. The theoretical results show that tangential tensile stress is produced in the outer edge of circular saw blade after laser shock tensioning process,and the natural frequencies of mode Nc = 0,Nd≥2 of circular saw blade increase and the dynamic stability of circular saw blade is improved effectively.
To give consideration to both computational efficiency and accuracy,based on nonlinear finite element theory,with reasonable simplification and assumption,a method using elastic thermal expansion instead of plastic deformation in shock zone was proposed,and a theoretical analysis model of laser shock of circular saw blade was established by ABAQUS software,which combined elasto-plastic and vibration mode analysis. Tensioning stress and natural frequency of circular saw blade after laser shock tensioning process were calculated by this model. Tensioning stress of circular saw blade after laser shock tensioning process was tested by static strain gauge and resistance strain acquisition. By comparing theoretical analysis and measured results of tensioning stress,the correction of the theoretical model was proved. The theoretical results show that tangential tensile stress is produced in the outer edge of circular saw blade after laser shock tensioning process,and the natural frequencies of mode Nc = 0,Nd≥2 of circular saw blade increase and the dynamic stability of circular saw blade is improved effectively.
引文
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[16]柳沅汛,王曦,吴先前,等.激光冲击处理304不锈钢表面的形貌特征及其机理分析[J].中国激光,2013,40(1):101-108.LIU Yuanxun,WANG Xi,WU Xianqian,et al.Surface morphology and deformation mechanism of 304 stainless steel treated by laser shock peening[J].Chinese Journal of Lasers,2013,40(1):101-108.
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[18]张青来,赵博,张冰昕,等.多次激光冲击强化对З∏866马氏体不锈钢组织及残余应力的影响[J].中国激光,2016,43(11):121-128.ZHANG Qinglai,ZHAO Bo,ZHANG Bingxin,et al.Effect of multiple-laser shock processing on microstructure and residual stress ofз∏866 martensitic stainless steel[J].Chinese Journal of Lasers,2016,43(11):121-128.
[19]吴先前,黄晨光,宋宏伟.激光冲击强化诱导的残余应力影响因素分析[J].中国激光,2010,35(10):2632-2637.WU Xianqian,HUANG Chenguang,SONG Hongwei.Parameters analysis of residual stress induced by laser shock processing[J].Chinese Journal of Lasers,2010,35(10):2632-2637.
[20]DING K,YE L.Simulation of multiple laser shock peening of a35CD4 steel alloy[J].Journal of Materials Processing Technology,2006,178(1-3):162-169.
[21]周南,乔登江.脉冲束辐照材料动力学[M].北京:国防工业出版社,2002.ZHOU Nan,QIAO Dengjiang.Materials dynamics under pulse beam radiation[M].Beijing:National Defense Industry Press,2002.
[2]LI B,ZHANG Z K,LI W G,et al.A numerical simulation on multi-spot pressure tensioning process of circular saw blade[J].Journal of Wood Science,2015,61(6):578-585.
[3]白硕玮,张进生,王长会,等.薄型锯片锯切硬脆石材横向振动模型[J].农业机械学报,2015,46(2):372-378,371.BAI Shuowei,ZHANG Jinsheng,WANG Changhui,et al.Analytical model of transverse vibration of thin type circular saw in sawing hard and brittle stone[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(2):372-378,371.
[4]HEISEL U,STEHLE T,GHASSEMI H.A simulation model for analysis of roll tensioning of circular saw blade[J].Advanced Materials Research,2014,1018:57-66.
[5]LI B,ZHANG Z K.Research on the effect of yield strength of circular saw blade on roll tensioning process[J].Journal of Wood Science,2016,63(2):140-146.
[6]LI B,ZHANG Z K,LI W G,et al.Effect of yield strength of a circular saw blade on the multi-spot pressure tensioning process[J].Bio Resources,2015,10(4):7501-7510.
[7]LI B,ZHANG Z K,LI W G,et al.Model for tangential tensioning stress in the edge of circular saw blades tensioned by multispot pressure[J].Bio Resources,2015,10(2):3798-3810.
[8]孙汝剑,朱颖,郭伟,等.激光冲击强化对TC17表面形貌及残余应力场影响的有限元数值模拟研究[J].塑性工程学报,2017,24(1):187-193.SUN Rujian,ZHU Ying,GUO Wei,et al.Effect of laser shock processing on surface morphology and residual stress field of TC17titanium alloy by FEM method[J].Journal of Plasticity Engineering,2017,24(1):187-193.
[9]CUELLAR S,HILL M,DEWALD A,et al.Residual stress and fatigue life in laser shock peened open hole samples[J].International Journal of Fatigue,2012,44(11):8-13.
[10]ACHINTHA M,NOWELL D,FUFARI D,et al.Fatigue behavior of geometric features subjected to laser shock peening:Experiments and modeling[J].International Journal of Fatigue,2014,46(9):171-179.
[11]SALIMIANRIZI A,FOROOZMEHR E,BADROSSAMAY M,et al.Effect of laser shock peening on surface properties and residual stress of Al6061-T6[J].Optics and Lasers in Engineering,2016,77:112-117.
[12]FU J,ZHU Y H,ZHENG C,et al.Effect of laser shock peening on the compressive deformation and plastic behavior of Zr-based bulk metallic glass[J].Optics and Lasers in Engineering,2016,86:53-61.
[13]李玉杰,陈东林,熊竻琦,等.TC4钛合金板材激光冲击强化动态应力波传播特性的数值模拟与实验[J].塑性工程学报,2011,18(4):79-84.LI Yujie,CHEN Donglin,XIONG Leqi,et al.Numerical simulation and experimental investigation on the transient transmission of stress wave of TC4 material during laser shock processing[J].Journal of Plasticity Engineering,2011,18(4):79-84.
[14]王文兵,陈东林,汪诚,等.薄板激光冲击强化残余应力场的数值模拟与试验[J].塑性工程学报,2010,17(2):28-32.WANG Wenbing,CHEN Donglin,WANG Cheng.Numerical simulation and experimental investigation of residual stress field for laser shock processing[J].Journal of Plasticity Engineering,2010,17(2):28-32.
[15]王文兵,陈东林,周留成.激光冲击强化残余应力场的数值仿真分析[J].塑性工程学报,2009,16(6):127-130.WANG Wenbing,CHEN Donglin,ZHOU Liucheng.Numerical simulation analysis on residual stress field for laser shock processing[J].Journal of Plasticity Engineering,2009,16(6):127-130.
[16]柳沅汛,王曦,吴先前,等.激光冲击处理304不锈钢表面的形貌特征及其机理分析[J].中国激光,2013,40(1):101-108.LIU Yuanxun,WANG Xi,WU Xianqian,et al.Surface morphology and deformation mechanism of 304 stainless steel treated by laser shock peening[J].Chinese Journal of Lasers,2013,40(1):101-108.
[17]熊纯,李志丰,王学德.激光冲击处理TC11钛合金材料微观组织热稳定性[J].塑性工程学报,2013,20(3):116-120.XIONG Chun,LI Zhifeng,WANG Xuede.Thermal stability of microstructure of laser shock processed TC11 titanium alloy[J].Journal of Plasticity Engineering,2013,20(3):116-120.
[18]张青来,赵博,张冰昕,等.多次激光冲击强化对З∏866马氏体不锈钢组织及残余应力的影响[J].中国激光,2016,43(11):121-128.ZHANG Qinglai,ZHAO Bo,ZHANG Bingxin,et al.Effect of multiple-laser shock processing on microstructure and residual stress ofз∏866 martensitic stainless steel[J].Chinese Journal of Lasers,2016,43(11):121-128.
[19]吴先前,黄晨光,宋宏伟.激光冲击强化诱导的残余应力影响因素分析[J].中国激光,2010,35(10):2632-2637.WU Xianqian,HUANG Chenguang,SONG Hongwei.Parameters analysis of residual stress induced by laser shock processing[J].Chinese Journal of Lasers,2010,35(10):2632-2637.
[20]DING K,YE L.Simulation of multiple laser shock peening of a35CD4 steel alloy[J].Journal of Materials Processing Technology,2006,178(1-3):162-169.
[21]周南,乔登江.脉冲束辐照材料动力学[M].北京:国防工业出版社,2002.ZHOU Nan,QIAO Dengjiang.Materials dynamics under pulse beam radiation[M].Beijing:National Defense Industry Press,2002.