Title

INSTABILIDADE PLÁSTICA EM CILINDRO DE PAREDES FINAS SUJEITO À PRESSÃO INTERNA – ESTUDO DE CASO

PLASTIC INSTABILITY IN THIN-WALLED CYLINDER SHELL SUBMITTED TO THE ACTION OF INTERNAL PRESSURE

Authorship

Ilkiu, Anselmo Monteiro

Ilkiu, Anselmo Monteiro

I am this author

DOI

10.5151/1516-392X-26159

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Abstract

No presente trabalho será apresentado um modelo matemático para a análise da instabilidade plástica de um cilindro de parede fina sujeita a pressão interna, considerando o material com anisotropia normal R no estado plano de tensões. As equações foram obtidas, com base nas teorias elásticas e plásticas, considerando o critério de escoamento de von Mises no estado plano de tensões em termos da anisotropia normal, e de acordo com os trabalhos realizados por Johnson & Mellor [1], Chakrabarty [2] e Al-Qureshi [3].

This work will be presented a mathematical model for the analysis of plastic instability in a thin-walled cylinder shell submitted to the action of internal pressure, considering the material with normal anisotropy in the plane state of stress. The model was developed based in the elastic and plastic theories, considering the yielding criterion of von Mises in the plane stress, in terms of the normal anisotropy and according to the work done by Johnson & Mellor [1], Chakrabarty [2] and Al-Qureshi [3]. For the analysis of the results were considered, the geometric properties that define the cylindrical body and the material properties. Obtaining the geometric properties of the resulting cylindrical body the hoop stress and axial stress and the internal pressure in the plastic instability.

Keywords

Instabilidade plástica, Critério de escoamento, Anisotropia

Plastic instability, Criterion of yielding, Anisotropy