Experimental Investigation and Dimensionless Analysis of Forming of Rectangular Plates Subjected to Hydrodynamic Loading

2017 ◽  
Keyword(s):  
Experimental Investigation ◽  
Rectangular Plates ◽  
Dimensionless Analysis ◽  
Hydrodynamic Loading

Experiments on the Buckling of Simply-Supported Rectangular Plates

1969 ◽  
Vol 73 (703) ◽  
pp. 607-608 ◽  
Author(s):  
A. C. Mills
Keyword(s):  
Experimental Investigation ◽  
Theoretical Analysis ◽  
Boundary Conditions ◽  
Buckling Load ◽  
Theoretical Solution ◽  
Rectangular Plates ◽  
Uniform Load ◽  
Simply Supported

In ref. (1) Pope presents a theoretical analysis of the buckling of rectangular plates tapered in thickness under uniform load in the direction of taper. An experimental investigation into the end load buckling problem for a plate having simply-supported edges with the sides prevented from moving normally in the plane of the plate is described in ref. (2). For these boundary conditions the theoretical solution is exact. However, the compatability equation is not satisfied exactly when the sides are free to move in the plane of the plate. This experimental investigation demonstrates that the buckling load is nevertheless adequately predicted by the analysis in these circumstances.

Experimental Investigation and Model Analysis on Upper Plenum Entrainment in AP1000

2018 ◽  
Author(s):  
Y. Xiang ◽  
Y. W. Wu ◽  
Mingjun Wang ◽  
W. X. Tian ◽  
S. Z. Qiu ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Energy Conservation ◽  
Pressure Vessel ◽  
Phase Interface ◽  
Mass Conservation ◽  
Dimensionless Number ◽  
Experiment Data ◽  
Two Phase ◽  
Dimensionless Analysis ◽  
Test Loop

Upper plenum entrainment plays an important role for the coolant inventory in small break LOCA. When the mixture level in the pressure vessel is lower than the height of the hot leg, the coolant will still be entrained to the hot leg in the form of upper plenum entrainment with further decrease of the liquid level in the pressure vessel, posing threat to core uncovering and melting. ADETEL (Automatic Depressurization and Entrainment Test Loop) was scaled after the automatic depressurization lines and the pressure vessel in AP1000 to investigate the upper plenum entrainment. The main droplet entrainment mechanisms from the two-phase interface to the hot leg has been obtain, including soaring, splashing, fragmentation, hitting and fusion. The dimensionless analysis was applied obtain the significant dimensionless number based on the mass conservation and energy conservation. It can be found that the predict data was different from the experiment data with an error of ±50%.

Threshold Characteristics of Short Pulse Loads Causing Fracture in Concrete and Rocks

2011 ◽  
Vol 82 ◽  
pp. 106-111 ◽  
Author(s):  
Ivan V. Smirnov ◽  
Yuri V. Petrov ◽  
Yuri V. Sudenkov ◽  
Ezio Cadoni
Keyword(s):  
Experimental Investigation ◽  
Fracture Surface ◽  
Dynamic Loading ◽  
Pulse Energy ◽  
Crack Extension ◽  
Short Pulse ◽  
High Rate ◽  
Rectangular Plates ◽  
Wire Explosion ◽  
Measured Dependence

Results of experimental investigation of concrete and rocks under high rate loads of microsecond duration (2.5 µs) are presented. Tested samples are rectangular plates (150/150/15 mm) with a notch (70 mm long and 3 mm thick) containing a pre-crack (about 1 mm long). Dynamic loading was created utilizing electric wire explosion technique. An electric wire was placed between the faces of the notch at a distance of 20 mm from the tip of the pre-crack. After the wire explosion the trajectory of the extended crack and the fracture surface were studied. Measured dependence of the crack extension on the loading pulse energy gives the possibility of determining the threshold (minimal) amplitude of the load required to initiate fracture in the studied samples.

Buckling and Post-buckling Behaviour of Plates with Holes

1975 ◽  
Vol 26 (4) ◽  
pp. 281-296 ◽  
Author(s):  
D Ritchie ◽  
J Rhodes
Keyword(s):  
Experimental Investigation ◽  
Finite Element ◽  
Theoretical Analysis ◽  
Finite Element Methods ◽  
Experimental Investigations ◽  
Rectangular Plates ◽  
Simply Supported ◽  
Circular Holes ◽  
Post Buckling ◽  
Plate Width

SummaryThis paper gives details of theoretical and experimental investigations into the behaviour of simply-supported uniformly compressed square and rectangular plates with central circular holes. The theoretical analysis employs an approximate approach using a combination of Rayleigh-Ritz and finite-element methods. The experimental investigation consisted of a number of experiments on plates with hole diameters from one- to seven-tenths of the plate width. Agreement between experiment and theory is shown to be good at buckling. In the post-buckling range it is found that the theoretical analysis is reasonably accurate for small holes, but loses accuracy when dealing with large holes.

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