Influence of Fiber Orientation and Adhesion Properties On Tailored Fiber-reinforced Elastomers

Beter, Julia; Schrittesser, Bernd; Meier, G. H.; Fuchs, Peter; Pinter, Gerald

doi:10.1007/s10443-020-09802-w

Cited by 15 publications

(25 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the stiffness and strength of fibers and the elastomer matrix differ significantly, the mechanical properties are much more complex to determine and crucial for evaluating the fiber-matrix adhesion [1,46]. Moreover, to trigger load-coupling mechanisms in flexible composites effectively, an in-depth knowledge of the fiber-matrix bonding and mechanical performance of single-fiber, fiber-bundle and simple composite structures within the principle of a test chain constituting the aspects from model-and component level are required [47]. Recent studies on fiber reinforced silicones were carried out focusing on the properties of the fiber-matrix interface and reported on the challenge of dealing with hyperelastic elastomers [48].…”

Section: Introductionmentioning

confidence: 99%

The Tension-Twist Coupling Mechanism in Flexible Composites: A Systematic Study Based on Tailored Laminate Structures Using a Novel Test Device

et al. 2020

Self Cite

View full text Add to dashboard Cite

The focus of this research is to quantify the effect of load-coupling mechanisms in anisotropic composites with distinct flexibility. In this context, the study aims to realize a novel testing device to investigate tension-twist coupling effects. This test setup includes a modified gripping system to handle composites with stiff fibers but hyperelastic elastomeric matrices. The verification was done with a special test plan considering a glass textile as reinforcing with different lay-ups to analyze the number of layers and the influence of various fiber orientations onto the load-coupled properties. The results demonstrated that the tension-twist coupling effect strongly depends on both the fiber orientation and the considered reinforcing structure. This enables twisting angles up to 25° with corresponding torque of about 82.3 Nmm, which is even achievable for small lay-ups with 30°/60° oriented composites with distinct asymmetric deformation. For lay-ups with ±45° oriented composites revealing a symmetric deformation lead, as expected, no tension-twist coupling effect was seen. Overall, these findings reveal that the described novel test device provides the basis for an adequate and reliable determination of the load-coupled material properties between stiff fibers and hyperelastic matrices.

show abstract

Section: Introductionmentioning

confidence: 99%

The Tension-Twist Coupling Mechanism in Flexible Composites: A Systematic Study Based on Tailored Laminate Structures Using a Novel Test Device

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Moreover, the influence of the fiber–matrix adhesion at the interface is affected by the elastomeric matrix. A detailed discussion of the shear induced load coupling mechanism by different fiber orientations can be found in [ 45 ].…”

Section: Resultsmentioning

confidence: 99%

“…This favors the formation of wrinkling as a typical behavior of textile-like composites with high flexibility, which further affects the local debonding between the fiber–matrix interaction and tends to augment viscoelastic behavior [ 23 , 64 ]. The results regarding the fiber–matrix interaction, pull-out behavior, and microscopy pictures of the impregnation quality of a fiber bundle with the surrounding matrix were investigated, while the effects of different fiber orientations induced by shearing and their consequences on the load coupling mechanism in flexible composites were analyzed in previous investigations [ 45 ]. With respect to the influence of the relaxation time, the experiments with 30 s relaxation time demonstrated slightly lower maximum stress values (at 25% strain) compared to those with 0 s or 10 s relaxation times, as depicted in Figure 5 b.…”

Section: Resultsmentioning

confidence: 99%

“…This allowed the load coupling mechanism and the shearing behavior from the fiber–matrix adhesion to be investigated. Moreover, studies [ 45 ] revealed that the maximum in-plane deformation is limited by the fiber orientation until the displacement of the fibers relative to each other reaches the maximum shift angle (also known as “locking angle”), where wrinkling perpendicular to the textile plane (the so-called “trellis effect”) emerges, leading to premature fiber breakage [ 44 ].…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, flexible composites have large differences in the stiffness and flexibility between the fibers and elastomeric matrix, causing a textile-like performance [ 44 ]. In this context, conventional test setups are not appropriate, and therefore special test devices need to be designed, particularly for these materials [ 45 ]. In this context, the fiber–matrix connection is crucial, since the interface is essential for the load transmission [ 46 ], and thus for the load coupling (as investigated in previous studies [ 47 ]).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Viscoelastic Behavior of Glass-Fiber-Reinforced Silicone Composites Exposed to Cyclic Loading

et al. 2020

Self Cite

View full text Add to dashboard Cite

The aim of this work was to analyze the influence of fibers on the mechanical behavior of fiber-reinforced elastomers under cyclic loading. Thus, the focus was on the characterization of structure–property interactions, in particular the dynamic mechanical and viscoelastic behavior. Endless twill-woven glass fibers were chosen as the reinforcement, along with silicone as the matrix material. For the characterization of the flexible composites, a novel testing device was developed. Apart from the conventional dynamic mechanical analysis, in which the effect of the fiber orientation was also considered, modified step cycle tests were conducted under tensile loading. The material viscoelastic behavior was studied, evaluating both the stress relaxation response and the capability of the material to dissipate energy under straining. The effects of the displacement rate of the strain level, the amplitude of the strain applied in the loading–unloading step cycle test, and the number of the applied cycles were evaluated. The results revealed that an optimized fiber orientation leads to 30-fold enhanced stiffness, along with 10 times higher bearable stress. The findings demonstrated that tailored reinforced elastomers with endless fibers have a strong influence on the mechanical performance, affecting the structural properties significantly.

show abstract

Simulations of the snap‐through behavior of a fiber reinforced elastomer structure for the design of a simple clamping mechanism

Schasching

Duy

Todt

et al. 2023

Proc Appl Math and Mech

View full text Add to dashboard Cite

A glass fiber reinforced elastomer (FRE) sheet is used to design a simple clamping mechanism for prospective engineering applications. The mechanism is based on the phenomena of snap-through buckling of a segment of a shallow cylindrical shell. It is simply supported at the straight edges and actuated by edge moments. The main objective of such a mechanism is the resulting clamping force, being related to the response of the material under bending. Bending includes compressive stresses, and since the fibers are embedded in a very soft matrix, it is important to understand their contribution to the compressive stiffness of the FRE sheet. For this purpose, numerical simulations by means of the Finite Element Method are performed and a simulation strategy for predicting the clamping force of the mechanism is presented. The clamping forces predicted for FRE composites with and without the contribution of fibers to the compressive stiffness are compared to that of the pure elastomer. The results illustrate the potential of FRE based structures in mechanism-like applications. If an adequate clamping force is desired, the pure elastomer is not suitable for being used in this kind of clamping mechanism and the fiber reinforcement is necessary. If the fibers contribute to the compressive stiffness, a significantly higher clamping force is predicted. Furthermore, the FRE based structure shows a complex snap-through deformation pattern, which has to be taken into account in the design of the mechanism and which requires non-trivial simulation strategies.

show abstract

Influence of Fiber Orientation and Adhesion Properties On Tailored Fiber-reinforced Elastomers

Cited by 15 publications

References 24 publications

The Tension-Twist Coupling Mechanism in Flexible Composites: A Systematic Study Based on Tailored Laminate Structures Using a Novel Test Device

The Tension-Twist Coupling Mechanism in Flexible Composites: A Systematic Study Based on Tailored Laminate Structures Using a Novel Test Device

Viscoelastic Behavior of Glass-Fiber-Reinforced Silicone Composites Exposed to Cyclic Loading

Simulations of the snap‐through behavior of a fiber reinforced elastomer structure for the design of a simple clamping mechanism

Contact Info

Product

Resources

About