EXPERIMENTAL STUDY OF SPALLING STRENGTH AND THE HYDRO-ELASTIC-VISCOPLASTIC CONSTITUTIVE EQUATIONS WITH DAMAGE

The paper introduces the research background, current status and performance of architectural membrane materials, analyzes the superiority of PVC and PTFE performance, discusses the aging and standards of architectural membrane materials, and conducts new rheological destruction of architectural membrane materials. The aging and relaxation characteristics described by the constitutive equations, and the viscos-elastoplastic rheological failure of architectural membranes for constitutive experiments. At the end of the thesis, the aging performance degradation of architectural membrane materials is discussed, and the aging of architectural membrane materials and the significance of membrane performance degradation are explored in depth.

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Cyclic behaviour of short glass fibre reinforced polyamide: Experimental study and constitutive equations

International Journal of Plasticity ◽

10.1016/j.ijplas.2011.02.005 ◽

2011 ◽

Vol 27 (8) ◽

pp. 1267-1293 ◽

Cited By ~ 61

Author(s):

A. Launay ◽

M.H. Maitournam ◽

Y. Marco ◽

I. Raoult ◽

F. Szmytka

Keyword(s):

Experimental Study ◽

Glass Fibre ◽

Constitutive Equations ◽

Cyclic Behaviour ◽

Short Glass Fibre ◽

Glass Fibre Reinforced ◽

Short Glass

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A Numerical/Experimental Study on the Performance of Enhanced Viscoelastic Constitutive Equations

Progress and Trends in Rheology V ◽

10.1007/978-3-642-51062-5_48 ◽

1998 ◽

pp. 116-117

Author(s):

Gerrit W. M. Peters ◽

Jeroen F. M. Schoonen ◽

Frank P. T. Baaijens ◽

Han E. H. Meijer

Keyword(s):

Experimental Study ◽

Constitutive Equations

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Experimental Study of the Mechanical Behavior of Materials under Transient Regimes of Superplastic Deforming

Materials Science Forum ◽

10.4028/www.scientific.net/msf.735.232 ◽

2012 ◽

Vol 735 ◽

pp. 232-239 ◽

Cited By ~ 3

Author(s):

Olga I. Bylya ◽

Rudolf Vasin ◽

Peter Chistyakov ◽

Anatoly Muravlev

Keyword(s):

Mechanical Properties ◽

Experimental Study ◽

Experimental Analysis ◽

Constitutive Equations ◽

Superplastic Deformation ◽

Coarse Grained ◽

Stress Strain ◽

Transient Regimes ◽

Initial Stage ◽

Microstructure Of The Material

Transient regimes of deforming are always present in any technological process and can be taken into account and used more widely if properly studied. The behavior of the materials under such regimes is becoming even more interesting if initial microstructure is coarse grained and undergoes transformation in the process of deforming. One of the transient processes which happen in any Superplastic deformation is the initial stage of loading, before steady superplastic flow starts. Initial parts of stress-strain curves during superplastic deformation are not frequently studied experimentally but provide very important information about mechanical properties of material. They are also necessary for development and verification of the constitutive equations. The results of experimental analysis of the behaviour of titanium alloys under superplastic conditions at the initial stages of loading and also under unloading are presented here. Another type of transient regimes of deforming is represented by the strain rate jumps. In such kind of experiments if the amplitudes of the jumps are big enough, the shifts of the corresponding parts of the stress-strain curves about the basic ones (hardening or softening) can be observed depending on the amplitude of the jump and microstructure of the material. Some experimental results related to this effect are discussed in this paper. The applicability of some constitutive equations for description of the observed results is discussed. The necessity of involving visco-elastic properties of material for proper description of its behavior in some regimes of deforming is also mentioned.

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Influence of temperature and cooling liquid immersion on the mechanical behavior of a PPS composite: experimental study and constitutive equations

SN Applied Sciences ◽

10.1007/s42452-020-2160-2 ◽

2020 ◽

Vol 2 (3) ◽

Author(s):

Quentin C. P. Bourgogne ◽

Vanessa Bouchart ◽

Pierre Chevrier ◽

Emmanuel Dattoli

Keyword(s):

Experimental Study ◽

Mechanical Behavior ◽

Constitutive Equations ◽

Influence Of Temperature ◽

Cooling Liquid ◽

Liquid Immersion

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Experimental and Numerical Studies of Welded Tubes Formability

Materials Science Forum ◽

10.4028/www.scientific.net/msf.614.129 ◽

2009 ◽

Vol 614 ◽

pp. 129-134 ◽

Cited By ~ 5

Author(s):

A. Ayadi ◽

Abel Cherouat ◽

Mohammed Ali Rezgui ◽

Najeh Mezghani

Keyword(s):

Experimental Study ◽

Heat Affected Zone ◽

Constitutive Equations ◽

Tube Hydroforming ◽

Global Measure ◽

Anisotropic Hardening ◽

Material Parameters ◽

Numerical Studies ◽

Displacement Thickness ◽

Welded Tube

This paper presents a numerical methodology which aims to improve 3D welded tube hydroforming formability. This methodology is based on elastoplastic constitutive equations accounting for non-linear anisotropic hardening. The experimental study is dedicated to the identification of material parameters (the parent and the heat-affected zones) using the global measure response of tube displacement, thickness evolution and internal pressure expansion. Applications are made to study numerically the effect of the anisotropic parameters, the hardening flow and the heat-affected zone shape on the hydro-formability of welded tubes.

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Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013955x ◽

1995 ◽

Vol 53 ◽

pp. 636-637

Author(s):

Norio Baba ◽

Norihiko Ichise ◽

Syunya Watanabe

Keyword(s):

Experimental Study ◽

Spherical Aberration ◽

Incident Beam ◽

Optical Parameters ◽

Beam Tilting ◽

Illumination Method ◽

Restoration Method ◽

Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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