Time-Dependent Fracture Behaviour of Polymers at Impact and Quasi-Static Loading Conditions

2017 ◽  
pp. 3-21
Author(s):  
R. Lach ◽  
W. Grellmann
Keyword(s):  
Static Loading ◽  
Fracture Behaviour ◽  
Time Dependent ◽  
Loading Conditions

scholarly journals Time-dependent failure of amorphous polylactides in static loading conditions

2009 ◽  
Vol 21 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Tom A. P. Engels ◽  
Serge H. M. Söntjens ◽  
Theo H. Smit ◽  
Leon E. Govaert
Keyword(s):  
Static Loading ◽  
Time Dependent ◽  
Loading Conditions ◽  
Dependent Failure

scholarly journals Rate-dependent ductile fracture under plane strain tension: experiments and simulations

2018 ◽  
Vol 183 ◽  
pp. 02022
Author(s):  
Vincent Grolleau ◽  
Vincent Lafilé ◽  
Christian C. Roth ◽  
Bertrand Galpin ◽  
Laurent Mahéo ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Plane Strain ◽  
Static Loading ◽  
High Strain ◽  
Fracture Initiation ◽  
Surface Strain ◽  
Experimental Program ◽  
Loading Conditions ◽  
Plane Strain Tension

Among all other stress states achievable under plane stress conditions, the lowest ductility is consistently observed for plane strain tension. For static loading conditions, V-bending of small sheet coupons is the most reliable way of characterising the strain to fracture for plane strain tension. Different from conventional notched tension specimens, necking is suppressed during V-bending which results in a remarkably constant stress state all the way until fracture initiation. The present DYMAT talk is concerned with the extension of the V-bending technique from low to high strain rate experiments. A new technique is designed with the help of finite element simulations. It makes use of modified Nakazima specimens that are subjected to V-bending. Irrespective of the loading velocity, plane strain tension conditions are maintained throughout the entire loading history up to fracture initiation. Experiments are performed on specimens extracted from aluminum 2024-T3 and dual phase DP450 steel sheets. The experimental program includes quasi static loading conditions which are achieved on a universal testing machine. In addition, high strain rate experiments are performed using a specially-designed drop tower system. In all experiments, images are acquired with two cameras to determine the surface strain history through stereo Digital Image Correlation (DIC). The experimental observations are discussed in detail and also compared with the numerical simulations to validate the proposed experimental technique

scholarly journals Computational simulation of fracture behaviour in auxetic cellular structure by multiaxial loading

2019 ◽  
Vol 300 ◽  
pp. 03001
Author(s):  
Branko Nečemer ◽  
Janez Kramberger ◽  
Nejc Novak ◽  
Srečko Glodež
Keyword(s):  
Computational Model ◽  
Cellular Structure ◽  
Computational Models ◽  
Fracture Behaviour ◽  
Computational Simulation ◽  
Tangential Direction ◽  
Multiaxial Loading ◽  
Loading Conditions ◽  
Normal Contact ◽  
Auxetic Structure

A computational simulation of fracture behaviour in auxetic cellular structure, subjected to multiaxial loading is presented in this paper. A fracture behaviour of the 3D (three-dimensional) chiral auxetic structure under multiaxial loading conditions was studied. The computational models were used to study the geometry effect of the unit cell on the Poisson’s ratio and fracture behaviour of the analysed chiral auxetic structure. A 3D computational model was built using FEM-code LS DYNA. The discrete computational model of chiral auxetic structure was built using beam finite elements. The lattice model of the analysed auxetic structure was positioned between rigid plates and assembled in a way to simulate a hydro-compression loading conditions. Between the contacting surfaces interactions in normal (contact) and tangential direction (friction) with the node-to-surface approach were simulated. A developed computational model offers insight in the fracture behaviour of considered auxetic cellular structure and helps to better understanding their crushing behaviour under impact multiaxial loading.

Towards joinability of thermal self-piercing riveting for AA7075-T6 aluminum alloy sheets under quasi-static loading conditions

2021 ◽  
Vol 189 ◽  
pp. 105978
Author(s):  
Liang Ying ◽  
Tianhan Gao ◽  
Minghua Dai ◽  
Ping Hu ◽  
Jingchao Dai
Keyword(s):  
Aluminum Alloy ◽  
Static Loading ◽  
Loading Conditions

Component specific influences on the fracture behaviour of high speed steels under static loading

1995 ◽  
Vol 66 (6) ◽  
pp. 272-277 ◽  
Author(s):  
Nils Lippmann ◽  
Heinz-Joachim Spies
Keyword(s):  
Static Loading ◽  
High Speed ◽  
Fracture Behaviour

scholarly journals Time dependent fracture behaviour of a carbon fibre composite based on a (rubber toughened) acrylic polymer

2016 ◽  
Vol 2 ◽  
pp. 253-260 ◽  
Author(s):  
Tommaso Pini ◽  
Francesco Briatico-Vangosa ◽  
Roberto Frassine ◽  
Marta Rink
Keyword(s):  
Carbon Fibre ◽  
Fracture Behaviour ◽  
Fibre Composite ◽  
Time Dependent ◽  
Carbon Fibre Composite ◽  
Acrylic Polymer ◽  
Rubber Toughened

Ternary PC/ABS/PMMA blends — morphology and mechanical properties under quasi-static loading conditions

Polimery ◽  
2012 ◽  
Vol 57 (2) ◽  
pp. 87-94 ◽  
Author(s):  
JAN RYBNICEK ◽  
RALF LACH ◽  
WOLFGANG GRELLMANN ◽  
MONIKA LAPCIKOVA ◽  
MIROSLAV SLOUF ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Static Loading ◽  
Loading Conditions ◽  
Pmma Blends ◽  
Morphology And Mechanical Properties
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