A multi-scale biomechanical model based on the physiological structure and lignocellulose components of wheat straw.
Biomechanical behavior is a fundamental property for the efficient utilization of wheat straw in such applications as fuel and renewable materials. Tensile experiments and lignocellulose analyses were performed on three types of wheat straw. A multi-scale finite element model composed of the microscopic model of the microfibril equivalent volume element and the macroscopic model of straw tissue was proposed based on the physiological structure and lignocellulose components of wheat straw. The tensile properties of wheat straw were simulated by ANSYS software. The predicted stress-strain data were compared with the observed data, and good correspondence was achieved for all three types of wheat straw. The validated multi-scale finite-element (FE) model was then used to investigate the effect of the lignocellulose components on the biomechanical properties of wheat straw. More than 80% of stress is carried by the cellulose fiber, whereas the strain is mainly carried by the amorphous cellulose.
College of Engineering, China Agricultural University (East Campus), PB 191, 17 Qing-Hua-Dong-Lu, Hai-Dian District, Beijing 100083, PR China. Electronic address: clj1020@cau.edu.cn.
Longjian
L
Chen
College of Engineering, China Agricultural University (East Campus), PB 191, 17 Qing-Hua-Dong-Lu, Hai-Dian District, Beijing 100083, PR China. Electronic address: 1015853837@qq.com.
Aiwei
A
Li
College of Engineering, China Agricultural University (East Campus), PB 191, 17 Qing-Hua-Dong-Lu, Hai-Dian District, Beijing 100083, PR China. Electronic address: hxq12@cau.edu.cn.
Xueqin
X
He
College of Engineering, China Agricultural University (East Campus), PB 191, 17 Qing-Hua-Dong-Lu, Hai-Dian District, Beijing 100083, PR China. Electronic address: clj1020@googlemail.com.
Lujia
L
Han
D001696:Biomechanical Phenomena; D002236:Carbohydrate Conformation; D020342:Finite Element Analysis; D008031:Lignin / Q000737:chemistry*; D055595:Mechanical Phenomena; D008958:Models, Molecular; D013314:Stress, Mechanical; D013718:Tensile Strength; D014908:Triticum / Q000737:chemistry
C036909:lignocellulose; D008031:Lignin
Biomechanical properties; Lignocellulose components; Multi-scale model; Wheat straw