Effect of Fiber Content on Mechanical Properties and Vibration Damping Characteristics of Bast Fiber Reinforced Composites

HE Liping, PI Chaoxion, CHEN Dachuan, TAN Bohuan, ZHANG Bangji, YUAN Jianmin, LI Wei

Abstract

Damping and mechanical properties of bast fiber reinforced composites are important and key issues for their applications in manufacturing vehicle body components of automobile and high-speed train.Therefore，this work experimentally studied the kenaf fiber reinforced polypropylene composites. Investigation on the effect of fiber weight percentage on vibration characteristics and mechanical properties was carried out through mechanical tests and modal analysis.The results indicated that the tensile strain decreased with the increase in fiber content.The tensile modulus and tensile strength showed a rising trend with fiber content increase.Natural frequencies of the composites improved with fiber content increase in both the 1st and 2nd vibration modes.The damping ratio initially increased with the increase of fiber content before 10%，and then decreased after 10%. The highest composite damping ratio was of 0.093 obtained at 10% fiber content，which increased by 20.8% compared with the pure polypropylene.The damping ratio of the 2nd mode was higher than that of the 1st mode for each kenaf/pp composite.This suggests that damping properties of the kenaf/pp composites are related to vibration amplitude.

 

Keywords: bast fiber  composites,  fiber content,  natural frequency,  damping ratio,  mechanical properties


Full Text:

PDF


References


LU B.ZHANG L W. ZENG J C,et al. Natural fiber reinforced composites [M]. Beijing: Chemical Industry Press,2005:34-50. (In Chinese)

LI W, HUANG H Y,WU Y Q. Preparation of jute fibers reinforced epoxy resin composites by VARTM [J]. Journal of Hunan University(Natural Sciences),2015,42(12 ):15-20.( In Chinese)

KRISHNA K V.KANNY K. The effect of treatment on kenaf filler using green approach and their reinforced epoxy composites [J] Composite Part B,2016,104( 11 ):111 - 117.

SABA N,PARIDAH M TJAWAID M. Mechanical properties of kenaf fibre reinforced polymer composite:A review [J].Construction and Building Materials,2015,76(4):87-96.

LI Y,LUO Y. Mechanical properties and application of natural fiber reinforced composites [J]. Chinese Journal of Solid Mechanics, 2010.31(6):613-630.(In Chinese)

MARQUES M A,MELO R, ARAUJO R,et al. Improvement of mechanical properties of natural fiber -polypropylene composites using successive alkaline treatments. [J].Journal of Applied Polymer Science, 2015,132( 12 ):41710-41722.

DUG F.BOURBAN P E. PLUMMER С, et al. Damping of thermoset and thermoplastic flax fiber composites [J]. Composites Part A:Applied Science and Manufacturing,2014,64 (11):115-[8]

WANG H,LJ J L.FAN W. Effect of filler volume fraction on modal properties of three-dimension braided composite T-beams [J]. Journal of Materials Engineering, 2015,43(9):80-86.(In Chinese)

KUMAR K S,SIVA I, JEYARA P,et al. Synergy of filler length and content on free vibration and damping behavior of natural fiber reinforced polyester composite beams [J]. Materials and Design, 2014.56(7):379-386.

ETAATI A, PATHER S,FANG Z P,et al. The study of fiber/matrix bond strength in short hemp polypropylene composites from dynamic mechanical analysis [J]. Composites Part B:Engineering, 2014.62(2): 19-28.

TREVISO A,VAN GENECHTEN B. MUNDO D,et d. Damping in composite materials: Properties and models [j]. Composites Part B: Engineering, 2015,78( 12): 144- 152.

ORNAGHI H L. POLETTO M. ORNAGHI F,et al. Dynamic mechanical properties and the dynamic fragility concept applied to vegetal fiber on vegetal composite materials [J]. Journal of Composite Materials, 2016,50 (18) : 2469-2475


Refbacks

  • There are currently no refbacks.