scholarly journals Fracture characteristics of single particle of polymeric materials under impact loading.

1979 ◽  
Vol 12 (5) ◽  
pp. 383-388 ◽  
Author(s):  
SATOSHI OKUDA ◽  
Woo Sik CHOI
Keyword(s):  
Single Particle ◽  
Impact Loading ◽  
Polymeric Materials ◽  
Fracture Characteristics

Deformation and Fracture Characteristics of Cenosphere Filled Epoxies Under Compressive Loading Conditions

2001 ◽  
Author(s):  
Nikhil Gupta ◽  
Eyassu Woldesenbet
Keyword(s):  
Epoxy Resins ◽  
Fracture Behavior ◽  
Moisture Absorption ◽  
Compressive Loading ◽  
Polymeric Materials ◽  
Local Stress ◽  
Fracture Characteristics ◽  
Structured Materials ◽  
Deformation And Fracture

Abstract Close cell structured foams are made by incorporation of cenospheres in polymeric materials. Low moisture absorption characteristics and considerably higher compressive strength of these materials compared to open cell structured foams make them suitable for use as core materials in sandwich structured materials. Incorporation of cenospheres in the epoxy resins enhances their impact strength and damage tolerance, especially if these materials are used in sandwich configurations. Present study analyzes and compares the effect of incorporation of cenospheres like flyash and glass microballoons in the epoxy resins on the deformation and fracture behavior of the material. Approach based on determination of local stress intensity factors is used to obtain estimate of the stresses in the material.

scholarly journals Impact Fracture of Composite and Homogeneous Nanoagglomerates

2008 ◽  
Vol 2008 ◽  
pp. 1-7 ◽  
Author(s):  
S. J. Antony ◽  
R. Moreno-Atanasio ◽  
J. Musadaidzwa ◽  
R. A. Williams
Keyword(s):  
Kinetic Energy ◽  
Impact Loading ◽  
Fracture Behaviour ◽  
Time Lag ◽  
Impact Fracture ◽  
Initial Kinetic Energy ◽  
Normal Impact ◽  
Fracture Characteristics ◽  
Hard Shell ◽  
The Moment

It is not yet clear on whether the fracture characteristics of structured composite capsules and homogeneous nanoagglomerates differ significantly under impact loading conditions. Experimental measurement of impact fracture properties of such small agglomerates is difficult, due to the length and time scales associated with this problem. Using computer simulations, here we show that nanoagglomerates are subjected to normal impact loading fracture within a few nanoseconds in a brittle manner. The restitution coefficient of the nanoagglomerates varies nonlinearly with initial kinetic energy. The fracture of nanoagglomerates does not always happen at the moment when they experience the maximum wall force, but occurs after a time lag of a few nanoseconds as characterised by impact survival time (IST) and IST index. IST is dependant on the initial kinetic energy, mechanical and geometric properties of the nanoagglomerates. For identical geometries of the capsules, IST index is higher for capsules with a soft shell than for these with a hard shell, an indication of the enhanced ability of the soft nanocapsules to dissipate impact energy. The DEM simulations reported here based on theories of contact mechanics provide fundamental insights on the fracture behaviour of agglomerates—at nanoscale, the structure of the agglomerates significantly influences their breakage behaviour.

Strain gauge experimental study on mode I rock fracture characteristics under impact loading

2021 ◽  
pp. 107858
Author(s):  
Qing Li ◽  
Chen Huang ◽  
Zhenghua Gao ◽  
Kai Wang ◽  
Wenlong Xu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Strain Gauge ◽  
Impact Loading ◽  
Rock Fracture ◽  
Mode I ◽  
Fracture Characteristics

Fracture characteristics of concrete subjected to impact loading

2010 ◽  
Vol 53 (2) ◽  
pp. 253-261 ◽  
Author(s):  
HaiFeng Liu ◽  
HaiYan Liu ◽  
WeiDong Song
Keyword(s):  
Impact Loading ◽  
Fracture Characteristics

Fracture characteristics of ceramic materials during thermal impact loading

1977 ◽  
Vol 9 (7) ◽  
pp. 877-882
Author(s):  
G. A. Gogotsi ◽  
L. P. Primak ◽  
V. A. Stepanenko ◽  
A. I. Zakharov
Keyword(s):  
Impact Loading ◽  
Ceramic Materials ◽  
Thermal Impact ◽  
Fracture Characteristics
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