Improved LayerWise Theory method application to stress analysis for composite tube in pure bending

7th Global Conference on Materials Science and Engineering

工业技术（总论）;材料科学

Zhang, C.^1^2 ; Chang, R.^1

Department of Civil Engineering, Xiamen University Fujian, Xiamen, China^1

Xiamen Engineering Technology Center for Intelligent Maintenance of Infrastructures, Xiamen, Fujian, China^2

关键词: Circumferential direction;    Eigenvalue techniques;    Improved layerwise theory;    Interpolation polynomials;    Layer-wise theory;    Local displacement;    Parameter methods;    Principle of minimum potential energy;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/474/1/012055/pdf
DOI  :  10.1088/1757-899X/474/1/012055

来源: IOP

【 摘 要 】

An improved approach using LayerWise theory (LWT) is developed for the stress analysis in pure bending composite tubes. The variables in the circumferential direction are separated from the local displacement, so the eigenvalue techniques are avoided. Then the composite tube is discretized only in the radial direction, and the related displacement in the local displacement is assumed as the simple interpolation polynomial function. Based on the principle of minimum potential energy, the local nodal variables are solved to calculate the strains and stresses for the composite tube. Several composite tubes are analyzed to illustrate the proposed approach feasibility. Besides, the exact solution by unified connected parameter method is employed for comparison. They are in good agreement with each other.