CAJ | 학술논문

由拉伸实验获得 E-玻纤增强复合板材的基本力学性能参数，为构建损伤分析模型及冲击有限元模型提供底层数据。通过弹性力学推导材料正交各向异性的本构关系，并对本构关系中的刚度矩阵进行数值解析，得到复合材料弹性本构方程；将结果应用于Hashin强度准则，建立以连续损伤力学为基础的正交各向异性损伤本构模型。将所建立的弹性及损伤本构关系赋予层合板三维模型，通过ABAQUS/Explicit软件模拟弹丸低速冲击GFRP板进行复合材料损伤力学分析，结果表明层合板内部损伤主要是分层和基体开裂，且层间脱层损伤面积远大于层内损伤，而各层内损伤模式中最主要的是基体开裂，其次是纤维断裂，而基体挤压和纤维挤压损伤区域相对较少。当层合板发生冲击变形后，冲击背部承受较大拉应力，微观上的损伤扩展演变到一定程度，基体开裂和纤维断裂会首先产生于GFRP冲击背面，而越靠近上表面损伤程度越小。
유랍신실험획득 E-파섬증강복합판재적기본역학성능삼수，위구건손상분석모형급충격유한원모형제공저층수거。통과탄성역학추도재료정교각향이성적본구관계，병대본구관계중적강도구진진행수치해석，득도복합재료탄성본구방정；장결과응용우Hashin강도준칙，건립이련속손상역학위기출적정교각향이성손상본구모형。장소건립적탄성급손상본구관계부여층합판삼유모형，통과ABAQUS/Explicit연건모의탄환저속충격GFRP판진행복합재료손상역학분석，결과표명층합판내부손상주요시분층화기체개렬，차층간탈층손상면적원대우층내손상，이각층내손상모식중최주요적시기체개렬，기차시섬유단렬，이기체제압화섬유제압손상구역상대교소。당층합판발생충격변형후，충격배부승수교대랍응력，미관상적손상확전연변도일정정도，기체개렬화섬유단렬회수선산생우GFRP충격배면，이월고근상표면손상정도월소。
The basic mechanical properties of E-glass fiber reinforced composites were achieved through tensile test to provide reference data for the material model and numerical simulation.Composite elastic constitutive equation was obtained through orthotropic constitutive material by derivation of elasticity and the numerical a-nalysis of stiffness matrix in constitutive.The results were applied to Hashin strength criterion,establishing a continuum damage mechanics based orthotropic damage constitutive model.Created flexibility and damage con-stitutive model given three-dimensional laminates,then using the finite element software ABAQUS/explicit simulated the impact of the proj ectile through the GFRP composite laminates to achieve the established model of the application,and the simulation results were analyzed.Laminates internal damage was mainly delamination and matrix cracking and interlaminar delamination damage area much larger than the inner layer.The most im-portant damage mode of each layer damage was matrix cracking damage,followed by fiber fracture inj ury while the base extrusion and fiber extrusion damaged area was relatively small.When the bending deformation oc-curred,bottom withstood greater tensile stress.When the evolution of damage extended to a certain extent, matrix cracking and fiber breakage was first produced in the back of GFRP impact.Closer to the damage of the inner surface layer was relatively small.