Measurement of nonlinear mechanical properties of PDMS elastomer

Kim, Tae Kyung; Kim, Jeong Koo; Jeong, Ok Chan

doi:10.1016/j.mee.2010.12.108

Cited by 340 publications

(203 citation statements)

References 14 publications

Supporting

Mentioning

176

Contrasting

Order By: Relevance

“…Additionally, a transition from bulk to thickness-dependent elasticity has been reported at a film thickness of around 200 µm [23]; the elastic modulus measured in a 50 µm thin film was roughly twice that of a 1 mm thick sample. The variance in reported values also seems to increase with decreasing thickness: the elastic modulus of samples of thickness around 100 µm has been reported from 0.3 MPa [24] to 2.9 MPa [25], with little agreement between studies.…”

Section: Pdms Materials Propertiesmentioning

confidence: 95%

“…Of three reports of Mooney-Rivlin models of Sylgard 184 with a ratio of 1:10, two have C01 at zero, reducing the model to a neo-Hookean solid. The value of C10 ranges from 70.5 kPa [24] to 321 kPa [25], with a change in this value from 205 kPa to 321 kPa reported as a result of an increase in PDMS bake time [25]. In our model, the hyperelastic constant C10 is varied to evaluate its effect on the stress estimates.…”

Section: Numerical Modeling: Pdms As a Hyperelastic Materialsmentioning

confidence: 99%

See 1 more Smart Citation

Molding topologically-complex 3D polymer microstructures from femtosecond laser machined glass

Schaap¹,

Bellouard²

2013

Opt. Mater. Express

View full text Add to dashboard Cite

Abstract:The fabrication of complex, three-dimensional microscale shapes that can be replicated over large surfaces is an ongoing challenge, albeit one with a wide range of possible applications such as engineered surfaces with tuned wetting properties, scaffolds for cell studies, or surfaces with tailored optical properties. In this work, we use a two-step femtosecond laser directwrite technique and wet-etching process to fabricate monolithic glass micromolds with complex three-dimensional surface topologies, and demonstrate the replication of these structures in a soft polymer (polydimethylsiloxane, PDMS). To estimate the forces experienced during the demolding for one representative structure, we use a combination of two models -a simple linear elastic model and a numerical hyperelastic model. These models are used to support the high experimental success rates of the demolding process observed, despite the high strain induced in the material during demolding. Since the process used is scalable, this work opens new avenues for low-cost fabrication of surfaces having complex microscale patterns with three-dimensional geometries.

show abstract

Section: Pdms Materials Propertiesmentioning

confidence: 95%

Section: Numerical Modeling: Pdms As a Hyperelastic Materialsmentioning

confidence: 99%

Molding topologically-complex 3D polymer microstructures from femtosecond laser machined glass

Schaap¹,

Bellouard²

2013

Opt. Mater. Express

View full text Add to dashboard Cite

show abstract

“…For the PDMS samples, a Neo-Hookean model was used, which has been shown to be well capable of describing the mechanical behavior of PDMS materials for stretches up to at least 1.5 [30]. For the biological materials, an exponential fiber-reinforced model was used.…”

Section: Constitutive Modelsmentioning

confidence: 99%

Nondestructive mechanical characterization of developing biological tissues using inflation testing

Oomen

Kelle

Oomens

et al. 2017

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

“…2 Experimental characterization of PDMS was focused on the estimation of viscoelastic properties and study of nonlinear behavior. Kim et al 3 measured the nonlinear mechanical properties of PDMS elastomer based on the mixing ratio of base polymer to curing agent. The findings of this study indicate that when PDMS is mixed with an excessive curing agent, stress softening occurs and residual strain exists in cyclic tension tests.…”

Section: Introductionmentioning

confidence: 99%

On effect of viscoelastic characteristics of polymers on performance of micropump

Gidde¹,

Pawar²

2017

Advances in Mechanical Engineering

View full text Add to dashboard Cite

Micropumps are the most important components of lab-on-a-chip devices, which are becoming popular recently due to their enormous advantages. Among the different designs of micropumps, the nozzle-diffuser valveless design is the most preferred one due to simplicity in manufacturing. For the simulation of these pumps, the local fluid-structure interaction modeling is important to get the performance accuracy. To capture fluid-structure interaction accurately, an appropriate selection of the fluid as well as the structural modeling approaches are very essential. It is well known that the polydimethylsiloxane materials behave as a viscoelastic material. However, most of the earlier studies on polydimethylsiloxane micropump modeling have considered polydimethylsiloxane as a linear elastic material. In this article, a nozzle-diffuserbased valveless micropump is modeled using a fluid-structure interaction approach along with a linear viscoelastic model for polydimethylsiloxane. The mechanical properties of the polydimethylsiloxane material are experimentally obtained using dynamic mechanical analysis for the range of micropump operating frequencies. These viscoelastic properties of polydimethylsiloxane, with varying proportionate of curing agent, are introduced in the fluid-structure interaction model of micropump using the Kelvin-Voigt model. The results are presented in the form of micropump performance parameters such as diaphragm deflection, von-Mises stresses, swept volume, and fluid flow rate.

show abstract

Measurement of nonlinear mechanical properties of PDMS elastomer

Cited by 340 publications

References 14 publications

Molding topologically-complex 3D polymer microstructures from femtosecond laser machined glass

Molding topologically-complex 3D polymer microstructures from femtosecond laser machined glass

Nondestructive mechanical characterization of developing biological tissues using inflation testing

On effect of viscoelastic characteristics of polymers on performance of micropump

Contact Info

Product

Resources

About