摘要
纤维柱增强泡沫夹芯结构是沿厚度方向在泡沫中植入纤维柱,以提高泡沫夹芯结构的抗压性能、抗剪切性能和抗弯曲性能.根据纤维柱增强泡沫夹芯结构的这一特点,通过建立细观力学模型,并结合修正的Mori-Tanaka方法预报纤维柱增强泡沫芯材的法向弹性模量和横向剪切模量.实验结果验证了该方法预报结果的准确性.利用该模型进一步探讨了纤维柱增强泡沫夹芯结构参数对芯子等效性能的影响.结果表明,纤维柱内纤维体积的变化对结构的法向弹性模量影响较大,对横向性能影响不大;纤维柱直径增大芯子法向比刚度也增大,但芯子的横向比剪切刚度反而降低.
A micro mechanical model was established to analyze the longitudinal Young＇ modulus and transverse shear modulus of the fiber composite columns reinforced foam core by using Corrected Mori-Tanaka theory.The test results show that the prediction results of the longitudinal Young＇ modulus and transverse shear modulus of the composite structure was effective.And then the effect of the fiber composite column parameters was evaluated.Results indicate that the volume fraction in the fiber composite columns has great influence on longitudinal Young＇ modulus,but has little influence on the transverse shear modulus.The specific longitudinal Young＇s modulus increases with the increase of diameter of fiber composite columns,but the specific transverse shear modulus decreases with the increase diameter of fiber composite columns.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2012年第3期29-33,共5页
Journal of Harbin Institute of Technology
基金
国家重点基础研究发展计划基金资助项目(2011CB610303)
中央高校基本研究业务费专项基金资助项目(HIT.NSRIF.2010069)
国家自然科学基金资助项目(90816024
10872059)
