Type A Sleeve Pipeline Repair Heated by Induction

2004 ◽  
Author(s):  
Byron Gonc¸alves de Souza Filho ◽  
Luiz Cla´udio de Marco Meniconi ◽  
Giovano Ghizoni ◽  
Vitor Jose´ Frainer ◽  
Jailson Torma Betanzos
Keyword(s):  
Laboratory Test ◽  
Induction Heating ◽  
Type A ◽  
Strain Gages ◽  
Stress Measurements ◽  
Mechanical Interference ◽  
Experimental Laboratory

This paper describes the experimental laboratory test in applying a snug fitted pipeline repair sleeve in an 8-inch diameter of non-defective pipe. The sleeve was forced to conform to the carrier pipe by induction heating. That procedure has successfully provided the mechanical interference between pipe and sleeve. The interference was evaluated by stress measurements by using strain gages installed after sleeve application over the pipe, but the measurements were performed during the disassembling of the sleeve.

Vibration Stress Measurements in Strong Centrifugal Fields

1937 ◽  
Vol 4 (4) ◽  
pp. A156-A159
Author(s):  
Charles M. Kearns ◽  
Ralph M. Guerke
Keyword(s):  
Resistance Strain ◽  
Strain Gages ◽  
Dynamic Measurements ◽  
Cementing Technique ◽  
Stress Measurements ◽  
Vibration Stress

Abstract Following a brief review of existing methods of measuring vibrational stresses in strong centrifugal fields, the authors discuss the characteristics of carbon-resistance strain gages and indicate their method of use. These gages may be calibrated statically and used for dynamic measurements with an accuracy of plus or minus ten per cent; and with present cementing technique they can be applied in fields up to 12000 × gravity. The necessary instruments for use with these pickups are described and several records of aircraft-propeller tip stresses are shown.

scholarly journals The Effect Of Heating Acrylic Resin Of Various Types With Different Temperatures On Impact Strength

2021 ◽  
Vol 12 (2) ◽  
pp. 141-148
Author(s):  
Didik Marsigid
Keyword(s):  
Impact Strength ◽  
Base Material ◽  
Acrylic Resin ◽  
Type A ◽  
Transverse Resistance ◽  
Different Temperatures ◽  
Experimental Laboratory ◽  
The Impact ◽  
Unstable Temperature

Resin polymerization which is affected by unstable temperature causes the resin to break easily. The strength of the base material is affected by the forces acting in the mouth, such as transverse forces, other resistance or fatigue, and flexibility. Fracture of denture caused by masticatory loads and is affected by forces acting in the mouth, including transverse, resistance or fatigue, and flexural forces. Experimental Laboratory total of 72 samples consisting of 18 samples of  type A, B and C cured at normal temperature, 100oC, 200oC, and 300oC. Types A, B and C have the effect of heating with the addition of temperature on the impact strength of acrylic resin, because the value of sig = 0.001 < 0.05, so H0 is rejected. An effect with the addition of temperature on the impact strength of the resin types A, B and C, because sig = 0.001 < 0.05, so H0 is rejected, which means that the average results are significantly different due to differences in temperature.

Implementation of Wear Models for Stamping Tools under Press Hardening Conditions Based on Laboratory Tests

2014 ◽  
Vol 1063 ◽  
pp. 339-342
Author(s):  
Liang Deng ◽  
Sergej Mozgovoy ◽  
Jens Hardell ◽  
Braham Prakash ◽  
Mats Oldenburg
Keyword(s):  
Tool Wear ◽  
Laboratory Test ◽  
Laboratory Tests ◽  
Laboratory Experiments ◽  
Fe Simulation ◽  
Full Scale ◽  
Wear Depth ◽  
Contact Conditions ◽  
Press Hardening ◽  
Experimental Laboratory

Tool wear occurring in press hardening processes receives insufficient attention since its corresponding measurements and full-scale experiments are complicated and expensive. This paper presents a study of tool wear in press hardening based on laboratory experiments and FE-simulations. Two experimental laboratory setups depending on the contact conditions in press hardening build the base for the wear models implemented in the FE-simulation to predict wear depths. The highest wear depth is found at the radius of the stamping tool and the discrepancies in wear predictions based on the two different laboratory test setups are analyzed.

Researches for the Optimization of the Dehydration Process for Plums and Apricots

2013 ◽  
Vol 837 ◽  
pp. 212-217
Author(s):  
Ioan Tenu ◽  
Radu Rosca ◽  
Petru Cârlescu ◽  
Ionuţ Dumitru Veleşcu
Keyword(s):  
Laboratory Test ◽  
Continuous Monitoring ◽  
Product Layer ◽  
Dehydration Process ◽  
Test Rig ◽  
Working Process ◽  
Before And After ◽  
Experimental Laboratory ◽  
Mass And Heat Transfer ◽  
Working Parameters

The dehydration of the products of vegetable origin is a complex technological process, involving heat and mass transfer, which is largely affected by the nature and characteristics of the fruits, but also by the technical performances of the equipment. Experimental laboratory tests must be performed in order to evaluate the effect and importance of these parameters, using equipments which are able to reproduce the technological dehydration process. In order to achieve these goals a specialized test rig was designed and built. The laboratory test rig allows different dehydration experiments to be carried out; all the parameters that affect the dehydration process - temperature, speed and humidity of the drying agent before and after the mass and heat transfer takes place, the weight and temperature of the dehydrated product, the direction of the drying agent etc. - are continuously monitored. The continuous monitoring of the working parameters is performed by the means of a specialized industrial computer, which allows the data aquision and transfer to a PC. The paper presents the details regarding the design and working process of the laboratory test rig, as well as the experimental results concerning the dehydration of plums and apricots. The results show that the dehydration process is affected by the temperature and speed of the drying agent, by the size of the particles and by the thickness of product layer.

An Experimental Laboratory Test of the Effects of Alternative Indicators of Progress

2018 ◽  
Vol 143 (3) ◽  
pp. 901-915
Author(s):  
Tim Kasser ◽  
Doug Maynard ◽  
Andrew Perry
Keyword(s):  
Laboratory Test ◽  
Experimental Laboratory

Biological and Morphological Studies on Low-Leukemia-Strain Mice with Hodgkin's-Like Neoplasia Induced by Serial Cell-Free Transmission of Leukemic Organs of SJL/J Strain Mice

1968 ◽  
Vol 26 ◽  
pp. 210-211
Author(s):  
S. Fujinaga ◽  
K. Maruyama ◽  
C.W. Williams ◽  
K. Sekhri ◽  
L. Dmochowski
Keyword(s):  
Tissue Culture ◽  
Type A ◽  
Reticulum Cell ◽  
Type B ◽  
Viral Origin ◽  
Serial Transfer ◽  
Strain Mouse ◽  
Morphological Studies ◽  
Cell Neoplasm ◽  
Free Material

Yumoto and Dmochowski (Cancer Res.27, 2098 (1967)) reported the presence of mature and immature type C leukemia virus particles in leukemic organs and tissues such as lymph nodes, spleen, thymus, liver, and kidneys of SJL/J strain mice with Hodgki's-like disease or reticulum cell neoplasm (type B). In an attempt to ascertain the possibility that this neoplasia may be of viral origin, experiments with induction and transmission of this neoplasm were carried out using cell-free extracts of leukemic organs from an SJL/J strain mouse with spontaneous disease.It has been possible to induce the disease in low-leukemia BALB/c and C3HZB strain mice and serially transfer the neoplasia by cell-free extracts of leukemic organs of these mice. Histological examination revealed the neoplasia to be of either reticulum cell-type A or type B. Serial transfer is now in its fifth passage. In addition leukemic spleen from another SJL/J strain mouse with spontaneous reticulum cell neoplasm (type A) was set up in tissue culture and is now in its 141st serial passage in vitro. Preliminary results indicate that cell-free material of 39th tissue culture passage can reproduce neoplasia in BALB/c mice.

Hepatitis A Antigen in Liver, Bile and Stool

1975 ◽  
Vol 33 ◽  
pp. 340-341
Author(s):  
D.R. Jackson ◽  
J.H. Hoofnagle ◽  
A.N. Schulman ◽  
J.L. Dienstag ◽  
R.H. Purcell ◽  
...  
Keyword(s):  
Hepatitis A ◽  
Liver Enzymes ◽  
Hepatitis A Virus ◽  
Type A ◽  
Initial Study ◽  
Virus Like Particle ◽  
Elevated Liver Enzymes ◽  
Ag Particles ◽  
Ag Particle ◽  
Human Stool

Using immune electron microscopy Feinstone et. al. demonstrated the presence of a 27 nm virus-like particle in acute-phase stools of patients with viral hepatitis, type A, These hepatitis A antigen (HA Ag) particles were aggregated by convalescent serum from patients with type A hepatitis but not by pre-infection serum. Subsequently Dienstag et. al. and Maynard et. al. produced acute hepatitis in chimpanzees by inoculation with human stool containing HA Ag. During the early acute disease, virus like particles antigenically, morphologically and biophysically identical to the human HA Ag particle were found in chimpanzee stool. Recently Hilleman et. al. have described similar particles in liver and serum of marmosets infected with hepatitis A virus (HAV). We have investigated liver, bile and stool from chimpanzees and marmosets experimentally infected with HAV. In an initial study, a chimpanzee (no.785) inoculated with HA Ag-containing stool developed elevated liver enzymes 21 days after exposure.

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