Novel Micromechanics-Based Woven-Fabric Composite Constitutive Model with Material Nonlinear Behavior

AIAA Journal ◽  
2000 ◽  
Vol 38 (8) ◽  
pp. 1437-1443 ◽  
Author(s):  
Ala Tabiei ◽  
Yiwei Jiang ◽  
Witao Yi
Keyword(s):  
Constitutive Model ◽  
Nonlinear Behavior ◽  
Woven Fabric ◽  
Fabric Composite ◽  
Material Nonlinear

scholarly journals Vibration analysis of hard-coating laminated plate considering strain-dependent characteristic

2018 ◽  
Vol 37 (4) ◽  
pp. 789-800 ◽  
Author(s):  
Wei Sun ◽  
Xiaozhou Liu ◽  
Jixiang Jiang
Keyword(s):  
Composite Plate ◽  
Nonlinear Behavior ◽  
Coating Material ◽  
Hard Coating ◽  
Nonlinear Phenomenon ◽  
Laminated Plate ◽  
Lagrange’S Equation ◽  
Calculation Results ◽  
Material Nonlinear ◽  
Strain Dependent

An analytical modeling method of hard-coating laminated plate under base excitation was studied considering strain-dependent characteristic of coating material (i.e. a kind of material nonlinear behavior). For convenience, the strain-dependent characteristic of hard-coating material was characterized by polynomial, and the material parameters were divided into two parts: linearity and nonlinearity. Hard coating was regarded as a special layer in the analysis and Lagrange’s equation was used to acquire nonlinear equation of motion of the hard-coating laminated plate. Based on Newton–Raphson method, the procedure of solving resonant response and resonant frequency of composite plate was presented. Finally, a T300/QY89l1 laminated plate with NiCoCrAlY + YSZ hard coating was chosen to demonstrate the proposed method, the linear and nonlinear vibrations of the composite plate were solved, and only the linear results were validated by ANSYS software. The results reveal that there is a big difference between the calculation results considering the nonlinearity of coating material and the linear results, which means the laminated plate displays soft nonlinear phenomenon because of depositing coating.

Nonlinear Finite Element Analysis of Super-Long Pile and Soil Interaction in Soft Soil

2011 ◽  
Vol 201-203 ◽  
pp. 1601-1605 ◽  
Author(s):  
Shang Ping Chen ◽  
Wen Juan Yao ◽  
Sheng Qing Zhu
Keyword(s):  
Finite Element ◽  
Constitutive Model ◽  
Soft Soil ◽  
Three Dimensional ◽  
Nonlinear Behavior ◽  
Element Model ◽  
Element Analysis ◽  
Friction Resistance ◽  
Tip Resistance ◽  
Side Friction

In this paper, a nonlinear three-dimensional finite element model for super-long pile and soil interaction is established. In this model, contact elements are applied to simulate the nonlinear behavior of interaction of super-long pile and soil. A nonlinear elastic constitutive model for concrete is employed to analyze stress-strain relation of pile shaft under the axial load and the Duncan-Chang’s nonlinear constitutive model is used to reflect nonlinear and inelastic properties of soil. The side friction resistance, axial force, pile-tip resistance, and developing trend of soil plastic deformation are obtained and compared with measured results from static load tests. It is demonstrated that a super-long pile has the properties of degradation of side friction resistance and asynchronous action between side and pile-tip resistance, which is different from piles with a short to medium length.

Sign in / Sign up

Export Citation Format

Share Document