Instrumented tensile and falling weight impact response of injection-molded ?- and ?-phase polypropylene homopolymers with various melt flow indices

1999 ◽  
Vol 73 (7) ◽  
pp. 1205-1214 ◽  
Author(s):  
J. Karger-Kocsis ◽  
D. E. Mouzakis ◽  
G. W. Ehrenstein ◽  
J. Varga
Keyword(s):  
Impact Response ◽  
Melt Flow ◽  
Injection Molded ◽  
Weight Impact ◽  
Falling Weight

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.

Design on Falling Weight Impact Test Rig

2011 ◽  
Vol 148-149 ◽  
pp. 388-392
Author(s):  
Jie Du ◽  
Chun Ting Ma
Keyword(s):  
Impact Test ◽  
Particle Diameter ◽  
Test System ◽  
Computer Hardware ◽  
Sensor Data ◽  
Test Rig ◽  
High Shock ◽  
Data Acquisition Card ◽  
Weight Impact ◽  
Falling Weight

Based on Interaction energy of solid ball, the new particle damper is designed which can be used in a high temperature and high shock energy. To verify the design of the damper, a falling weight Impact test rig is designed, a sensor, data acquisition card and computer hardware constitutes a signal test system. Experimental results show that the particle diameter is the biggest impact for the role of the particle damper , the characteristics of the displacement curves are increased at first and then decreased, the opposite effect of the time. At the same time filled with particles and the degree of damping rod embedment also have an impact on energy consumption.

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