Falling-weight impact response for prototype RC type rock-shed with sand cushion

2014 ◽  
Vol 48 (10) ◽  
pp. 3367-3375 ◽  
Author(s):  
Abdul Qadir Bhatti
Keyword(s):  
Impact Response ◽  
Weight Impact ◽  
Falling Weight ◽  
Sand Cushion

scholarly journals Microstructure Related Fracture Behavior of a Discontinuous Polymer-Polymer Microlayer Composite

1993 ◽  
Vol 2 (4) ◽  
pp. 096369359300200 ◽  
Author(s):  
Q. Yuan ◽  
J. Karger-Kocsis ◽  
K. Friedrich ◽  
M. Grosso
Keyword(s):  
Light Microscopy ◽  
High Density Polyethylene ◽  
Fracture Behavior ◽  
Impact Resistance ◽  
High Impact ◽  
Impact Response ◽  
Out Of Plane ◽  
Impact Bending ◽  
Weight Impact ◽  
Falling Weight

The fracture behavior of a discontinuous microlayer polymer-polymer composite was studied at −40 °C on notched Charpy specimens and unnotched plates in instrumented impact bending and falling weight impact tests, respectively. The microstructure of the specimens, containing discontinuous layers of modified polyamide (PA; Selar®, Du Pont), more or less uniformly stacked and well overlapping, in a high-density polyethylene (HDPE) matrix, was assessed by light microscopy. Failure mode of the microlayered specimens was studied by fractography. It was concluded that the in-plane impact response of this discontinuous microlayer composite is superior to the out-of-plane one. In addition, a fine and regular microstructure imparts to a high impact resistance.

Impact Response Analysis of Prototype RC Girders with Sand Cushion Using Equivalent Fracture Energy Concept

2011 ◽  
Vol 20 (7) ◽  
pp. 1094-1111 ◽  
Author(s):  
Abdul Qadir Bhatti ◽  
Norimitsu Kishi
Keyword(s):  
Fracture Energy ◽  
Element Model ◽  
Impact Response ◽  
Response Analysis ◽  
Coarse Mesh ◽  
Fine Mesh ◽  
Energy Concept ◽  
Falling Weight ◽  
Concrete Elements ◽  
Sand Cushion

In order to establish a proper finite element model of prototype RC girder with sand element for impact response analysis, dynamic response analysis of RC girders with sand cushion subjected to impact force due to falling weight was performed to improve the state of the art of protective design for real scale rock-sheds using LS-DYNA code. Here, in order to establish a modification method for material properties of concrete so as to rationally analyze the prototype RC girder with sand cushion using coarse mesh, an equivalent fracture energy concept for concrete elements was proposed and the applicability was investigated comparing numerical analysis results with experimental results. From this study, it is confirmed that even though coarse mesh was used for prototype RC girder with sand cushion, similar results with those obtained using fine mesh can be assured.

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