Limit analysis of viscoplastic thick-walled cylinder and spherical shell under internal pressure using a strain gradient plasticity theory

Li, Maolin; Ming-fu, FU

doi:10.1007/s10483-008-1203-x

Cited by 7 publications

(1 citation statement)

References 9 publications

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“…Lack of considering the term of wall expansion acceleration is one of it's weaknesses. Li Mao-lin et al investigated plastic limit load of viscoplastic thick-walled cylinder and spherical shell subjected to internal pressure analytically using a strain gradient plasticity theory in the paper which is presented in 2008 [10]. Results show that the size effect is more evident with increasing strain or strain rate sensitivity index, but the weak point of this approach is that the viscoplastic model analysis doesn't include material behavior in all part of the wall.…”

Section: Introductionmentioning

confidence: 99%

Stress Analysis of Gun Barrel Subjected to Dynamic Pressure

Babaei

Malakzadeh²,

Asgari³

2015

IJMEA

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Abstract:In the optimal design of a modern gun barrel, there are some aspects to be considered. One of the main factor is internal ballistic which consist of pressure-time, pressure-distance, velocity-time and distance-time curves. In this paper, a simple analytical solution for the plastic stress of an internally pressurized open-ended thick-walled cylinder made of hardening steel which is the closest model to gun barrel is obtained in perfectly plastic and plane stress condition by using energy method and the yield criterion of Von Mises and adding rifle grooves and choosing stress components as basic unknowns and ballistic pressure equation as known. Then results of analytical solution are compared to a numerical model and verified a very well and reliable accuracy. So the resultant can be used easily in calculation of radial expansion velocity and compressive pressure.

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Section: Introductionmentioning

confidence: 99%

Stress Analysis of Gun Barrel Subjected to Dynamic Pressure

Babaei

Malakzadeh²,

Asgari³

2015

IJMEA

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Modeling of dynamic expansion of thick‐walled cylinder under high strain rate loading with strain rate sensitivity analysis

Bagheri

Vitoria

2015

Materialwissenschaft Werkst

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This paper presents an analysis of the dynamic behavior of thick-walled cylinder using Levy-Mises flow rule in the assumption of a non-linear strain rate hardening behavior under high strain rate loading. The theoretical model to be developed in this work applies indirect use of dynamic strength of material characterized by a non-linear relation and instant boundary condition based on Jones-Wilkins-Lee equation of state to establish differential equation for radial expansion velocity. Detailed discussion will be given with emphasis on the main aspects of the cylinder behaviour, i.e. radial displacement, internal pressure, strain rate, flow stress, radial and tangential stress and the influence of different material rate sensitive exponent.Results show a good agreement with the analytical solutions proposed here.

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