Validation of non-linear dynamic simulations through full field optical methods

Lampeas, George; Siebert, Thorsten

doi:10.1051/epjconf/20100646007

Cited by 6 publications

(5 citation statements)

References 4 publications

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“…A detailed description of the samples and of the Applied Mechanics and Materials Vol. 70 damage procedure is given in [6]. A testing system has been developed where the undamaged and the damaged sample are loaded in bending with known forces and the induced displacements are measured by using 3D DSPI.…”

Section: Example To Illustrate the Methodologymentioning

confidence: 99%

Use of Integrated Simulation and Experimentation to Quantify Impact Damage

Feligiotti¹,

Hack²,

Lampeas

et al. 2011

AMM

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The term damage can be generally defined as a change introduced into a system that affects its performance. Its identification and characterization is a valid help in deciding amongst continuing the operation or performing a repair or replacement of the system. A valid support to this decision is based on the use of well-known measurement techniques from Non-Destructive Testing and Evaluation (NDT&E). A well-established correlation between damage and features extracted from the measured data makes these techniques capable of providing information about the extent of the damage. However the prediction of the remaining useful life of a system by comparing full-filed measurements techniques and FEM analysis results is the challenge of an increasing number of research studies. The need of a guide for enumerating the extent of the damage has been the thrust to perform this work. A common methodology developed for both numerical and experimental studies will be presented. It consists of three main parts: proper selection of the parameter capable of describing the damage in a quantitative manner; several approaches to obtain results from measurement techniques and FEM analysis; and damage assessment making use of a quantitative comparison of FEM results only, full-field experimental results only, or comparison of FEM to experimental results. A different approach in damage assessment will be also presented making use of Zernike moment descriptors from which the severity of the damage is inferred. An example to illustrate the methodology will be shown.

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Section: Example To Illustrate the Methodologymentioning

confidence: 99%

Use of Integrated Simulation and Experimentation to Quantify Impact Damage

Feligiotti¹,

Hack²,

Lampeas

et al. 2011

AMM

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“…strain) is measured during the impact test, e.g. by piezoelectric sensors [11], by strain gauges [12] or by digital image correlation [13] as in the ADVISE project. In particular in this paper an impact test by use of a drop tower has been carried out on the above mentioned sandwich honeycomb panel (Figure 3).…”

Section: -P4 14th International Conference On Experimental Mechmentioning

confidence: 99%

Methodology for assessing impact damage using integrated simulation and experimentation

Feligiotti

Hack

Lampeas

2010

EPJ Web of Conferences

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Abstract. The investigation of damage induced by dynamic events is since many years of central interest especially to increase safety and security of all means of transportation. The use of integrated full-field optical methods and FEM analysis gives good results in investigating damage produced after impact. In this paper a methodology for assessing impact damage using both simulation and experimentation will be presented. The methodology considers the effect of the defect presence on different parameters (e.g. geometrical parameters, strain field, dynamic parameters). Although a number of possible approaches in providing FEM and measurement results are being investigated, a general procedure to compare the data has been identified and includes the possibility of using reduced or decomposed data for the comparison of results from experimentation and simulation.

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“…The skins covering the cellular core are produced of carbon/epoxy [0/90] 4 fabric composite material of 2 mm thickness ( Figure 1). To assess the panel energy absorbing capability, the panels have been tested in hard-body low velocity, low energy, mass-drop impact loading, using the drop-tower of the university of Patras [6]. The PA and PP panels have been impacted with energies ranging from 2.5 J to 30 J while for the sandwich panels an energy range between 148 J and 493 J has been applied.…”

Section: Impact Testingmentioning

confidence: 99%

Assessment of impact damage in CFRP by combined thermal and speckle methods

et al. 2010

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In this contribution we show experimental results for combined thermal and DSPI measurements on several fiber reinforced polymer test samples that have been impacted in a drop tower. Active thermography can give complementary information with regard to the type and size of the damage, but DSPI is used for assessing the effect of the damage, i.e. the difference in the displacement or strain field of a damaged and undamaged specimen.

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Validation of non-linear dynamic simulations through full field optical methods

Cited by 6 publications

References 4 publications

Use of Integrated Simulation and Experimentation to Quantify Impact Damage

Use of Integrated Simulation and Experimentation to Quantify Impact Damage

Methodology for assessing impact damage using integrated simulation and experimentation

Assessment of impact damage in CFRP by combined thermal and speckle methods

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