Kalman Filter based Neutral Axis tracking for damage detection in composites structures under changing axial loading conditions

2018 ◽  
Vol 206 ◽  
pp. 517-525 ◽  
Author(s):  
Rohan Soman ◽  
Wieslaw Ostachowicz
Keyword(s):  
Kalman Filter ◽  
Damage Detection ◽  
Axial Loading ◽  
Neutral Axis ◽  
Loading Conditions

Application of Kalman Filter based Neutral Axis tracking for damage detection in composites structures

2018 ◽  
Vol 184 ◽  
pp. 66-77 ◽  
Author(s):  
Rohan Soman ◽  
Katarzyna Majewska ◽  
Magdalena Mieloszyk ◽  
Pawel Malinowski ◽  
Wieslaw Ostachowicz
Keyword(s):  
Kalman Filter ◽  
Damage Detection ◽  
Neutral Axis

Study on Multi-Axial Mechanical Properties of a Polyurethane Foam and Experimental Verification

2011 ◽  
Vol 311-313 ◽  
pp. 301-308
Author(s):  
Shou Hong Han ◽  
Zhen Hua Lu ◽  
Yong Jin Liu
Keyword(s):  
Mechanical Properties ◽  
Constitutive Model ◽  
Polyurethane Foam ◽  
Axial Compression ◽  
Axial Loading ◽  
Hydrostatic Compression ◽  
Model Parameters ◽  
Loading Conditions ◽  
Three Point Bending ◽  
Pu Foam

In order to investigate the multi-axial mechanical properties of a kind of PU (polyurethane) foam, some experiments in different loading conditions including uni-axial tension, uni-axial compression, hydrostatic compression and three-point bending were conducted. It is shown that the hydrostatic component influences yield behavior of PU foam, the yield strength and degree of strain hardening in hydrostatic compression exceed those for uni-axial compression. In terms of the differential hardening constitutive model, the evolution of PU foam yield surface and plastic hardening laws were fitted from experimental data. A finite element method was applied to analyze the quasi-static responses of the PU foam sandwich beam subjected to three-point bending, and good agreement was observed between experimental load-displacement responses and computational predictions, which validated the multi-axial loading methods and stress-strain constitutive model parameters. Moreover, effects of two foam models applied to uni-axial loading and multi-axial loading conditions were analyzed and compared with three-point bending tests and simulations. It is found that the multi-axial constitutive model can bring more accurate prediction whose parameters are obtained from the tests above mentioned.

scholarly journals Verification of Brittle Fracture Criteria for Bimaterial Structures

2014 ◽  
Vol 8 (1) ◽  
pp. 44-48
Author(s):  
Grzegorz Mieczkowski ◽  
Krzysztof Molski
Keyword(s):  
Experimental Data ◽  
Composite Materials ◽  
Cyclic Loading ◽  
Brittle Fracture ◽  
Axial Loading ◽  
Loading Conditions ◽  
Fracture Criteria ◽  
Interfacial Cracks ◽  
Theoretical Results ◽  
Brittle Fracture Criteria

Abstract The increasing application of composite materials in the construction of machines causes strong need for modelling and evaluating their strength. There are many well known hypotheses used for homogeneous materials subjected to monotone and cyclic loading conditions, which have been verified experimentally by various authors. These hypotheses should be verified also for composite materials. This paper provides experimental and theoretical results of such verifications for bimaterial structures with interfacial cracks. Three well known fracture hypotheses of: Griffith, McClintock and Novozhilov were chosen. The theoretical critical load values arising from each hypotheses were compared with the experimental data including uni and multi-axial loading conditions. All tests were carried out with using specially prepared specimens of steel and PMMA.

Corrigendum to “Carbon nanotubes reinforced lightweight cement testing under tri-axial loading conditions” [J. Pet. Sci. Eng. 174 (2019) 663–675]

2019 ◽  
Vol 178 ◽  
pp. 1203
Author(s):  
Xin Li ◽  
Saeed Rafieepour ◽  
Stefan Z. Miska ◽  
Nicholas E. Takach ◽  
Evren Ozbayoglu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Axial Loading ◽  
Loading Conditions

Microstrain Around Dental Implants Supporting Fixed Partial Prostheses Under Axial and Non–Axial Loading Conditions, In Vitro Strain Gauge Analysis

2013 ◽  
Vol 24 (6) ◽  
pp. e546-e551 ◽  
Author(s):  
Luis Gustavo Oliveira de Vasconcellos ◽  
Renato Sussumu Nishioka ◽  
Luana Marotta Reis de Vasconcellos ◽  
Ivan Balducci ◽  
Alberto Noriyuki Kojima
Keyword(s):  
Dental Implants ◽  
Strain Gauge ◽  
Axial Loading ◽  
Loading Conditions

Application of Kalman filter based neutral axis tracking for crack length quantification in beam structures

2019 ◽  
Author(s):  
Rohan N. Soman ◽  
Martin Schagerl ◽  
Christoph Kralovec ◽  
Kai U. Schröder ◽  
Andreas Preisler ◽  
...  
Keyword(s):  
Kalman Filter ◽  
Crack Length ◽  
Neutral Axis ◽  
Beam Structures
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