摘要
根据缝纫泡沫芯材的特点,将由Mori-Tanaka法建立的计算纤维增强复合材料有效弹性模量的方法应用于缝纫芯材剪切模量的计算。预测典型缝纫泡沫芯材的面内剪切模量,进行夹层结构的面内剪切试验,试验结果与预估结果吻合较好。利用预估方法进一步讨论缝纫参数对缝纫芯材剪切模量的影响。结果表明,缝纫针孔径、缝纫针矩、行距等的变化实际是引起芯材中缝线体积含量的变化,在允许的工程缝纫参数范围内,剪切模量近似为缝线体积含量的线性函数。提高芯材的剪切模量是增大缝纫芯材剪切模量的主要途径,而改变缝线粗细对缝纫芯材的剪切模量影响不大。
A calculation models were established to analyse the shear modulus of the stitched foam core using Mori-Tanaka theoretics. The prediction result of the in plane shear modulus of a typical stitching foam-core sandwich composite was found good agree with the experimental results. The effects of stitching parameters were evaluated. Results indicate that the change of in plane shear modulus was caused by changing of some stitching parameters due to volume content change of kevlar stitches in the foam core. Shear modulus of the stitched foam core is mostly controled by shear modulus of foam core and change the thickness of stitches has little influence to the shear modulus when the stitches＇s volume content is low.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2007年第1期113-117,共5页
Journal of Mechanical Strength
基金
国家自然科学基金(10572116)
航空基金(04B53013)
西北工业大学青年科技创新基金资助项目~~
关键词
缝纫泡沫芯材
剪切模量
缝纫参数
体积含量
Stitching foam core
Shear modulus
Stitching parameters
Volume cement
