摘要
柔性纺织复合材料因具有柔韧性和可折展特性在变构型飞行器的应用中获得越来越多的关注,然而其力学性能仍有很大的不确定性。对石英纤维/硅橡胶柔性纺织复合材料进行5种偏轴角度的单轴拉伸实验,研究其单轴拉伸力学行为。针对石英纤维脆性强和硅橡胶涂层柔韧性强的特点,建立一种石英纤维/硅橡胶柔性复合材料的超弹性本构模型,将应变能密度函数解耦为经向、纬向的拉伸应变能密度函数以及将硅橡胶拉伸与纤维剪切耦合的应变能密度函数,基于单轴拉伸实验数据确定模型参数,与偏轴拉伸实验结果对比表明超弹性本构模型对面内拉伸行为预测误差小于3.88%。针对变构型飞行器中膜材柔性、可大变形的特点采用一种圆形膜材气压加载实验验证方法,可向柔性复合材料的膜面均匀施加载荷,并通过有限元软件Abaqus的用户子程序UANISOHYPER_INV实现所采用的超弹性本构模型,仿真数据与实验数据误差小于2.9%,表明所建立的超弹性本构模型对石英纤维/硅橡胶柔性复合材料的力学表征和数值仿真均具有良好的适用性。
Flexible textile composite materials have received increasing attention in the application of variable configuration aircraft due to their flexibility,and foldable and unfoldable properties.However,there are still great uncertainties about their mechanical properties.Uniaxial tensile experiments with five off-axial angles were conducted to study the uniaxial tensile mechanical behaviors of a quartz fiber/silicone rubber flexible textile composite material.A hyperelastic constitutive model was established based on the characteristics of the brittleness of quartz fiber and the toughness of silicone rubber,and the strain energy density function was decoupled into the strain energy density functions from fiber elongations along the warp and weft yarns direction,and the strain energy density function coupling silicone rubber elongation and fiber shear.The model parameters were determined based on the uniaxial tensile test data.Comparison with the results of off-axis tensile test shows that the prediction error of the hyperelastic constitutive model for the in-plane tensile behavior is less than 3.88%.According to the flexible and deformable characteristics of the quartz fiber/silicone rubber flexible textile composite material,a circular membrane pneumatic loading test verification method is adopted,which can uniformly apply load to the membrane surface.The proposed hyperelastic constitutive model is realized by the user subroutine UANISOHYPER_INV of the finite element software Abaqus,and the error between simulation data and experimental data is less than 2.9%,indicating that the established hyperelastic constitutive model has good applicability for mechanical characterization of the quartz fiber/silicone rubber flexible textile composite material.
作者
宁蕙
黄建栋
谭志勇
张宏宇
龚世秋
NING Hui;HUANG Jiandong;TAN Zhiyong;ZHANG Hongyu;GONG Shiqiu(Science and Technology on Space Physics Laboratory,China Academy of Launch Vehicle Technology,Beijing 100076,China;School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2024年第12期111-121,共11页
Journal of Materials Engineering
基金
国家自然科学基金资助项目(U20B2002)。
关键词
石英纤维
硅橡胶
柔性纺织复合材料
单轴拉伸
超弹性本构模型
气压加载实验
各向异性
quartz fiber
silicone rubber
flexible textile composite materials
uniaxial tensile
hyperelastic constitutive model
external pressure test
anisotropy
