Full-field measurement technique and its application to the analysis of materials behaviour under plane strain mode

Dournaux, Jean-Laurent; Bouvier, Salima; Aouafi, A.; Vacher, Pierre

doi:10.1016/j.msea.2008.09.052

Cited by 19 publications

(14 citation statements)

References 16 publications

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“…Lateral thinning of the sample associated with axial strain induces a certain amount of slip of the sample out of the grips depending on the degree of deformation. Usually this kind of slip is nearly unavoidable and the result would erroneously show a larger strain than actually occurs in the material or (and) fallacious permanent strain [15, 16]; however, this irreversible slip occurred only once in the first cycle as the specimen settled in the grips.…”

Section: Resultsmentioning

confidence: 99%

“…Use of a constant correction factor is valid at small strains or when a constant ratio is maintained between strains inside and outside of the gauge section; however, the nonlinear stress–strain relationships common in soft materials result in strain ratios that are functions of elongation. Another confounding factor when gauge length elongation is not directly measured is the slip between the sample and the grips [15, 16]. Self‐tightening grips may not respond properly to specimens below certain stiffness while fixed grips cannot respond to the thickness reduction induced by an axial deformation.…”

Section: Introductionmentioning

confidence: 99%

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The application of digital image techniques to determine the large stress–strain behaviors of soft materials

Han¹,

Rogalsky²,

Zhao³

et al. 2011

Polymer Engineering & Sci

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Understanding the mechanical properties of soft materials such as stress–strain behavior over a large deformation domain is essential for both mechanical and biological applications. Conventional measurement methods have limited access to these properties because of the difficulties in accurately measuring large deformations of soft materials. In this study, we optimized digital image correlation (DIC) method to measure the large‐strain deformations by considering referencing scheme and frame rate. The optimized DIC was utilized to estimate strain in characterizing the stress–strain behavior of a polydimethylsiloxane (PDMS) elastomer as a model soft material. A series of comparative experimental studies and finite element analysis were performed; they indicated the advantages of optimized DIC over conventional methods such as robustness to slip, insensitivity to boundary conditions, and the ability to yield consistent and reliable results. These advantages enabled the optimized DIC to perform an in‐depth analysis of the behavior of soft materials at large strain domain. An empirical constitutive equation to describe the large stress–strain behavior of PDMS was proposed and verified by finite element simulations that show excellent agreements with experimental results. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The application of digital image techniques to determine the large stress–strain behaviors of soft materials

Han¹,

Rogalsky²,

Zhao³

et al. 2011

Polymer Engineering & Sci

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“…Prototyped material prepared by custom designed molding system have to be inspected to discover detect defects in materials and to describe its deformation behaviour. Full-field optical strain field measurement method [9] was employed for assessed of reliability of the manufacturing tech- nology based on overall material properties and local deformation inhomogeneities. The collapsed structure of the composite specimen can be seen in Fig.…”

Section: Introductionmentioning

confidence: 99%

Deformation Characteristics of Chopped Fibre Composites Subjected to Quasi-Static Tensile Loading

Šleichrt

Adorna

Neühauserová

et al. 2016

APP

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Abstract. This work presents deformation behaviour of cost effective chopped fiber composites. Use of chopped fibre is advantageous for manufacturing however complex shape parts production technology could be challenging. Batches of samples with different fibres composition were subjected to uni-axial tensile loading to obtain overall materials properties and inspection of proper manufacturing based on local deformation inhomogeneities. Both crossbeam displacement and optical strain measurement were used for elastic characteristics evaluation. Deformation response was derived from full-field optical strain measurements based on digital image correlation method. Relatively large variation of mechanical properties testing of samples was found.

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“…The image correlation approach is widely used to evaluate the displacements and strain distributions of a wide range of objects from the meter and millimeter scales to the micrometer scale [3][4][5][6][7][8][9][10]. This approach involves calculating displacements and strains by image correlation of digital images of an object obtained before and after deformation.…”

Section: Introductionmentioning

confidence: 99%

Effect of reference point selection on microscopic stress measurement using EBSD

Mikami

Oda

Kamaya³

et al. 2015

Materials Science and Engineering: A

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Full-field measurement technique and its application to the analysis of materials behaviour under plane strain mode

Cited by 19 publications

References 16 publications

The application of digital image techniques to determine the large stress–strain behaviors of soft materials

The application of digital image techniques to determine the large stress–strain behaviors of soft materials

Deformation Characteristics of Chopped Fibre Composites Subjected to Quasi-Static Tensile Loading

Effect of reference point selection on microscopic stress measurement using EBSD

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