含有孔洞缺陷的复合材料粘结层的失效表征
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摘要
复合材料的层间开裂是复合材料破坏失效的主要形式。复合材料中粘结层的粘结强度对材料整体强度具有直接影响,而实际的工业生产中粘结层会不可避免地存在孔洞缺陷。通过有限元仿真、双悬臂梁(DCB)拉伸实验及内聚力参数反演辨识等工作对含有孔洞的粘结界面的失效表征进行了研究。对比了双线性内聚力模型和多线段插值型内聚力模型在当前问题的应用情况。其结果表明,多线段插值型内聚力模型的模拟结果更好,更适用于复合材料层间开裂的失效预测。
Delamination is the main form of failure of composite materials. The bonding strength of the adhesive layers in composite materials has a direct impact on the overall strength of materials or structures,while it will inevitably produce holes or defects in the actual adhesive layer during manufacture of composite materials. In our work,fracture test of double-cantilever beam( DCB) specimen,its finite element simulation by using cohesive zone model and inverse identification of cohesive parameters were carried out. In addition,the bilinear cohesive zone model was compared with the multi-segment interpolation cohesive zone model in terms of the fracture simulation of adhesive layer. The simulation results show that the multi-segment interpolation cohesive zone model has achieved a better result,which is more suitable for predicting the delamination of composite materials.
Delamination is the main form of failure of composite materials. The bonding strength of the adhesive layers in composite materials has a direct impact on the overall strength of materials or structures,while it will inevitably produce holes or defects in the actual adhesive layer during manufacture of composite materials. In our work,fracture test of double-cantilever beam( DCB) specimen,its finite element simulation by using cohesive zone model and inverse identification of cohesive parameters were carried out. In addition,the bilinear cohesive zone model was compared with the multi-segment interpolation cohesive zone model in terms of the fracture simulation of adhesive layer. The simulation results show that the multi-segment interpolation cohesive zone model has achieved a better result,which is more suitable for predicting the delamination of composite materials.
引文
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[3]Rice J R.A path independent integral and the approximate analysis of strain concentration by notches and cracks[J].Journal of Applied Mechanics,1968,35(2):379-386.
[4]Dugdale D S.Yielding of steel sheets containing slits[J].Journal of the Mechanics&Physics of Solids,1960,8(2):100-104.
[5]Barenblatt G I.The mathematical theory of equilibrium cracks in brittle fracture[J].Advances in Applied Mechanics,1962,7:55-129.
[6]Xu X P,Needleman A.Void nucleation by inclusion debonding in a crystal matrix[J].Modelling&Simulation in Materials Science&Engineering,1999,1(2):111.
[7]Barani O R,Mosallanejad M,Sadrnejad S A.Fracture analysis of cohesive soils using bilinear and trilinear cohesive laws[J].International Journal of Geomechanics,2015,16(4):04015088.
[8]Hallett S.13-predicting progressive delamination via interface elements[J].Delamination Behaviour of Composites,2008,32(14):367-386.
[9]Tvergaard V,Hutchinson J W.The relation between crack growth resistance and fracture process parameters in elastic-plastic solids[J].Journal of the Mechanics and Physics of Solids,1992,40(6):1377-1397.
[10]Shen B,Paulino G H.Direct extraction of cohesive fracture properties from digital image correlation:a hybrid inverse technique[J].Experimental Mechanics,2011,51(2):143-163.
[11]Xu Y,Guo Y,Liang L,et al.A unified cohesive zone model for simulating adhesive failure of composite structures and Its parameter identification[J].Composite Structures,2017,182(12):555-565.
[12]Fritsch F N,Carlson R E.Monotone piecewise cubic interpolation:algorithms and software[J].Siam Journal on Numerical Analysis,1980,17(2):238-246.
[13]Gain A L,Carroll J,Paulino G H,et al.A hybrid experimental/numerical technique to extract cohesive fracture properties for model fracture of quasi-brittle materials[J].International Journal of Fracture,2011,169(2):113-131.
[14]Sambridge M.Geophysical inversion with a neighbourhood algorithm-Ⅱ.Appraising the ensemble[J].Geophysical Journal International,1999,138(3):727-746.
[15]Nelder J A,Mead R.A simplex method for function minimization[J].Commput J,1965,7(4):308-313.
[2]Irwin G R.Analysis of stresses and strains near end of a crack traversing a plate[J].J.appl.mech,1957,24:361-364.
[3]Rice J R.A path independent integral and the approximate analysis of strain concentration by notches and cracks[J].Journal of Applied Mechanics,1968,35(2):379-386.
[4]Dugdale D S.Yielding of steel sheets containing slits[J].Journal of the Mechanics&Physics of Solids,1960,8(2):100-104.
[5]Barenblatt G I.The mathematical theory of equilibrium cracks in brittle fracture[J].Advances in Applied Mechanics,1962,7:55-129.
[6]Xu X P,Needleman A.Void nucleation by inclusion debonding in a crystal matrix[J].Modelling&Simulation in Materials Science&Engineering,1999,1(2):111.
[7]Barani O R,Mosallanejad M,Sadrnejad S A.Fracture analysis of cohesive soils using bilinear and trilinear cohesive laws[J].International Journal of Geomechanics,2015,16(4):04015088.
[8]Hallett S.13-predicting progressive delamination via interface elements[J].Delamination Behaviour of Composites,2008,32(14):367-386.
[9]Tvergaard V,Hutchinson J W.The relation between crack growth resistance and fracture process parameters in elastic-plastic solids[J].Journal of the Mechanics and Physics of Solids,1992,40(6):1377-1397.
[10]Shen B,Paulino G H.Direct extraction of cohesive fracture properties from digital image correlation:a hybrid inverse technique[J].Experimental Mechanics,2011,51(2):143-163.
[11]Xu Y,Guo Y,Liang L,et al.A unified cohesive zone model for simulating adhesive failure of composite structures and Its parameter identification[J].Composite Structures,2017,182(12):555-565.
[12]Fritsch F N,Carlson R E.Monotone piecewise cubic interpolation:algorithms and software[J].Siam Journal on Numerical Analysis,1980,17(2):238-246.
[13]Gain A L,Carroll J,Paulino G H,et al.A hybrid experimental/numerical technique to extract cohesive fracture properties for model fracture of quasi-brittle materials[J].International Journal of Fracture,2011,169(2):113-131.
[14]Sambridge M.Geophysical inversion with a neighbourhood algorithm-Ⅱ.Appraising the ensemble[J].Geophysical Journal International,1999,138(3):727-746.
[15]Nelder J A,Mead R.A simplex method for function minimization[J].Commput J,1965,7(4):308-313.