scholarly journals Design and Building of a Load Frame for Buckling Test

2020 ◽  
Author(s):  
Hadi Kazemiroodsari ◽  
Phillip Curtsmith ◽  
Nikolai Gabardi ◽  
Anuja Kamat ◽  
Kamren Donovan
Keyword(s):  
Load Frame ◽  
Buckling Test

Development of a cryogenic load frame for a neutron diffractometer

2010 ◽  
Vol 21 (2) ◽  
pp. 025904 ◽  
Author(s):  
Y Tsuchiya ◽  
H Suzuki ◽  
T Umeno ◽  
S Machiya ◽  
K Osamura
Keyword(s):  
Neutron Diffractometer ◽  
Load Frame

Gun Liner Emplacement Using Elastomeric Materials

2010 ◽  
Author(s):  
Robert H. Carter ◽  
David M. Gray
Keyword(s):  
Refractory Metal ◽  
Outer Diameter ◽  
Elastomeric Material ◽  
Elastomeric Materials ◽  
Residual Internal Stress ◽  
Inner Diameter ◽  
Bond Strengths ◽  
Frictional Bond ◽  
Load Frame ◽  
Metal Liner

The development of a process to emplace a refractory metal liner inside a gun tube is described. The process consists of filling the liner with an elastomeric material and then slipping this arrangement into the gun tube whose inner diameter is close to the outer diameter of the liner. The ends of the liner are plugged with plastic disks and pressure is applied to the elastomeric material by a load frame. This pressure can produce a residual internal stress within the steel gun tube that produces a frictional bond between the liner and gun tube. Initial efforts have resulted in bond strengths over 3 ksi (21 MPa). In addition, by tailoring the degree of lubrication between the elastomeric material and the liner, a graded autofrettage can be produced in the steel gun tube.

A uniaxial load frame forin situneutron studies of stress-induced changes in cementitious materials and related systems

2018 ◽  
Vol 89 (9) ◽  
pp. 092903
Author(s):  
Claire E. White ◽  
Nishant Garg ◽  
Daniel Olds ◽  
Joseph Vocaturo ◽  
S. Michelle Everett ◽  
...  
Keyword(s):  
Cementitious Materials ◽  
Uniaxial Load ◽  
Load Frame ◽  
Induced Changes

Taking into account the residual stresses during transverse calculation of the load frame to extend the service life above the warranty period

2016 ◽  
Vol 45 (3) ◽  
pp. 233-238
Author(s):  
S. V. Smirnov ◽  
D. A. Konovalov ◽  
S. V. Parshin ◽  
S. V. Vyskrebentsev ◽  
E. N. Perunov ◽  
...  
Keyword(s):  
Service Life ◽  
Residual Stresses ◽  
Warranty Period ◽  
Load Frame

Research on the Real-Time Property of TTCAN Protocol in Vehicle Communication Network

2014 ◽  
Vol 487 ◽  
pp. 674-677
Author(s):  
Xie Li
Keyword(s):  
Communication Network ◽  
Delay Time ◽  
Time Window ◽  
Communication Protocol ◽  
Idle Time ◽  
Vehicle Communication ◽  
Network Load ◽  
Network Application ◽  
Load Frame ◽  
The Impact

This paper introduces the time triggered bus technology in vehicle communication network application, the bus protocol project: exclusive time window, the window of time and idle time window is discussed. In the laboratory conditions, the different communication protocols and communication parameters can be easily realized, which can be used to analyze the CAN and TTCAN communication protocol and network load frame priority to the impact of delay time, and verify the correctness of the model.

Acoustic Emission Source Characterisation in Large-Scale Composite Structures

2011 ◽  
Vol 70 ◽  
pp. 381-386 ◽  
Author(s):  
Mark J. Eaton ◽  
Rhys Pullin ◽  
C.A. Featherston ◽  
Karen M. Holford
Keyword(s):  
Acoustic Emission ◽  
Damage Detection ◽  
Composite Structures ◽  
Large Scale ◽  
Amplitude Ratio ◽  
Matrix Cracking ◽  
Out Of Plane ◽  
Critical Components ◽  
Observed Damage ◽  
Buckling Test

Damage detection and location in aerospace composites is currently of great interest in the research community and is being driven by the need to reduce weight of commercial aircrafts and hence make substantial environmental improvements. The increased use of composites as safety critical components has led to the need for development of structural health monitoring (SHM) systems. Acoustic Emission (AE) offers an excellent potential for delivering the necessary information of damage detection to maintenance engineers in terms of location however there are currently no methodologies that can use AE signals to characterise damage sources. This paper explores a methodology for damage characterisation based on measuring the amplitude ratio (MAR) of the two primary plate wave modes, to allow identification of in-plane (matrix cracking) and out-of-plane sources (delamination). Results from a large-scale buckling test show good correlation between signal characterization and observed damage mechanisms.

Comparison of Tensile Testing Flow Stress to Orthogonal Plate Machining Flow Stress in FCC, BCC, and HCP Materials at Various Levels of Hardness Using a Videographic Quick Stop Device

2015 ◽  
Author(s):  
Lewis N. Payton ◽  
Wesley S. Hunko
Keyword(s):  
Statistical Analysis ◽  
Flow Stress ◽  
Tensile Testing ◽  
Metal Cutting ◽  
Force Plate ◽  
Orthogonal Machining ◽  
Hcp Materials ◽  
Load Frame ◽  
Material Conditions ◽  
The Many

Basic and advanced metal cutting research has been an ongoing effort since Cocquilhat’s early work directed towards measuring the work required to remove a given volume of material when drilling in the year 1851. Over the 150+ years since his experiments, one of the persistent issues in metal cutting has been how best to determine the flow stress in a metal undergoing cutting. In all the many models proposed since then, the flow stress of metal flowing in front of a cutting tool has not proven to be the same as the flow stress of metal undergoing a tensile pull. This paper examines the flow stress phenomenon using an improved Videographic Quick Stop equipment at Auburn University. The orthogonal machining plates and tensile specimens were all cut from the same stock. Tensile testing of the stock was performed immediately prior to the machining of the plates in a standard MTS load frame to allow actual metal cutting experiments to be performed and compared to actual load frame data from the same stock. Machining was conducted in a specially modified Cincinnati Horizontal Milling machine using an improved Videographic Quick Stop Device (VQSD) to capture the geometry of the cutting formation simultaneously with the forces in the X, Y and Z-axes using a standard Kistler force plate dynamometer. Utilizing the VQSD greatly increases the number of replicates available for statistical analysis by the metal cutting researcher. This allows for comprehensive multivariate analysis of the data with high confidence (> 95%) in the meaning of the results obtained, along with for powerful regression. The results of the data collection and statistical analysis are then used to populate the various historical models predicting the flow stress in metal cutting. The results indicate that one model is superior to all the other models in predicting the flow stress as predicted by the accompanying tensile test data. Further improvements in this model may lead to instantaneous tensile strength measurement when metal cutting with the need for load frames. This in turn would allow optimization of cutting conditions to match material conditions, resulting in a better product and longer-lived tools.

Sign in / Sign up

Export Citation Format

Share Document