Determination of optimal gas forming conditions from free bulging tests at constant pressure

2015 ◽  
Vol 217 ◽  
pp. 158-164 ◽  
Author(s):  
S.A. Aksenov ◽  
E.N. Chumachenko ◽  
A.V. Kolesnikov ◽  
S.A. Osipov
Keyword(s):  
Constant Pressure ◽  
Free Bulging

scholarly journals ПОЛІМЕР-ПОЛІМЕРНИЙ КОМПОЗИТ НА ОСНОВІ ВІДХОДІВ ЗШИТОГО ЕТИЛЕНВІНІЛАЦЕТАТУ

2019 ◽  
Vol 128 (6) ◽  
pp. 64-70
Author(s):  
Б. П. Савчук ◽  
Б. М. Савченко ◽  
Н. В. Сова ◽  
І. М. Костюк
Keyword(s):  
Mechanical Properties ◽  
Melting Point ◽  
Polymer Composite ◽  
Constant Pressure ◽  
Capillary Viscometer ◽  
Hydrostatic Weighing ◽  
Weighing Method ◽  
Hydrostatic Weighing Method

Development of technology for the processing of cross liked EVA waste, followed by the use of polymer / polymer composite PVC / EVA as a filler. Method. The determination of the MFI was carried out in accordance with ISO 1133: 1997 on a capillary viscometer of constant pressure at a temperature of (190 ± 0,5) ° С and a weight of 2,16 kg. The thermostability  and  melting  point  are  determined  using  the  RM-200C  Hapro  rheometer  plastograph.  The mechanical properties were determined on a bursting machine according to the ASTM D638. Hardness - using  a  hard-gauge  with  a  Shore-D  scale,  the  density  by  hydrostatic  weighing  method  on  the  analytical scales RADWAG AS-X2.

Determination of the Permeability Tensor of Fibrous Reinforcements for VARTM

1999 ◽  
Author(s):  
Pavel B. Nedanov ◽  
Suresh G. Advani ◽  
Shawn W. Walsh ◽  
William O. Ballata
Keyword(s):  
Constant Pressure ◽  
Permeability Tensor ◽  
Three Dimensions ◽  
Resin Flow ◽  
Flow Front ◽  
Resin Impregnation ◽  
Permeable Media ◽  
Front Position ◽  
Transverse Permeability

Abstract VARTM and SCRIMP composite manufacturing processes use a highly permeable media to distribute the resin through the thickness of the composite. Hence, manufacturing simulations of resin flow in such processes requires reliable data for in-plane as well as transverse permeability. The goal of this study is to propose a method for simultaneous determination of the principal values of 3D-permeability tensor of fibrous reinforcements. The permeability components are calculated from experimental data, consisting of flow front position with time during resin impregnation in three dimensions from a radial source under constant pressure using the SMARTweave [Walsh (1993), Fink et al.(1995)] sensor system. Experimental results are compared with numerical simulation.

scholarly journals Note on the boiling-point of sulphur

1908 ◽  
Vol 81 (548) ◽  
pp. 363-366 ◽  
Keyword(s):  
Boiling Point ◽  
Constant Pressure ◽  
Linear Expansion ◽  
Preceding Paper ◽  
Glass Tube ◽  
The Difference

As I have been partly to blame for the delay in the publication of the observations described in the preceding paper by Mr. N. Eumorfopoulos, it seems tight that I should make a brief statement, by way of apology, with regard to the object of the work and the causes which have led to the delay. The determination of the boiling-point of sulphur by Mr. E. H. Griffiths and myself in 1890 was made with the same air thermometer as that employed in my original experiments of 1887, and gave the same value for the difference-coefficient of the platinum thermometer. The result depended, however, on the scale of the constant-pressure air thermometer, and the correction for the expansion of the bulb was deduced from observations of the linear expansion over the range 0° to 500°C. of a piece of glass tube from which the bulb was made. Some uncertainty was introduced also by changes in the volume of the bulb at a temperature of 450°C.

scholarly journals The shape of the surface of a rotating mass of water as a variational problem

2016 ◽  
Vol 39 (2) ◽  
Author(s):  
F.C. Santos ◽  
A.C. Tort
Keyword(s):  
Variational Approach ◽  
Constant Pressure ◽  
Equilibrium Shape ◽  
Classical Mechanics ◽  
External Pressure ◽  
Constant Angular Velocity ◽  
Theoretical Physics ◽  
Lagrange Equations ◽  
Physical Problems

Variational methods have a long and remarkable role in theoretical physics. Few of our students when first exposed to them fail to admire their elegance and efficacy in the formulation and solution of physical problems. In this paper we apply the variational approach that leads to the Euler-Lagrange equations to the determination of the shape of the surface of a mass of water that partially fills a cylindrical bucket that rotates with constant angular velocity (Newton's bucket). Here this approach will lead us to the principle of minimization of the effective potential energy associated with the system. The effect of an external pressure on the equilibrium shape is also taken into account and two models, the constant pressure model and the linear model are discussed. The level of the discussion is kept accessible to undergraduates taking an intermediate level course in classical mechanics.

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