Studies of High-Accuracy Stress Calculation Method in Isogeometric Structure Analysis

Abstract:

The stress calculated method of isogeometric structure analysis is studied in this paper. Based on the fact that stress calculated values at Guass integral points are more accurate than other locations, the stress field can be rebuilt by fitting the Guass integral points stress value from the displacement field, and two methods including stress interpolation and least square fit are presented to reduce the stress error. The example of infinite plate with circular hole is used to illustrate our methods performance, and the results show that our methods can improve the stress calculate accuracy notable.

• Periodical: Applied Mechanics and Materials (Volumes 347-350)
• Pages: 3786-3791
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.347-350.3786
• Online since: August 2013
• Authors: Gang He, Hao Gu, Zheng Yu Pan
• Keywords: Isogeometric Analysis, Least Square Method Component, Linear Elastic, Stress Error, Stress Interpolation

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