Caracterização Mecânica de Compósitos de Poliamida/Fibra de Carbono Via Ensaios de Cisalhamento Interlaminar e de Mecânica da Fratura

Botelho, Edson Cocchieri; Rezende, Mirabel Cerqueira

doi:10.1590/s0104-14282002000300007

Cited by 7 publications

(6 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This test consists of the generation of a direct shear load along the interlaminar interface and forces the separator to break in pure shear. The distribution of the shear stress is almost uniform across the thickness with two peaks close to the edges of the loading surface [26][27][28]. To perform this test, 5 specimens with dimensions of (10 × 10 × 3) mm were used, the test speed was 0.25 mm min −1 and 10 KN load cell.…”

Section: Compression Shear Test (Cst)mentioning

confidence: 99%

Processing, thermal and mechanical behaviour of PEI/MWCNT/carbon fiber nanostructured laminate

Santos

Ribeiro

Hein

et al. 2017

Mater. Res. Express

View full text Add to dashboard Cite

In this work, nanostructured composites of polyetherimide (PEI) with addition of functionalized multiwall carbon nanotube (MWCNT) were processed via solution mixing. After processing, these nanocomposites were evaluated by thermogravimetry (TGA), dynamic-mechanical analysis (DMA), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Subsequently, the nanocomposite was processed with carbon fibers by using hot compression molding. In order to evaluate interlaminar fracture strength, the processed laminates were mechanically evaluated by interlaminar shear strength (ILSS) and compression shear test (CST). Also, the Weibull distribution was employed to help in the statistical treatment of the data obtained from the mechanical tests. With regards to the fracture of the specimens, optical microscopy was used for the evaluation of the material. The addition of 1 wt% of MWCNT in the polymer matrix increased both thermal stability and viscoelastic behavior of the material. These improvements positively impacted the mechanical properties, generating a 16% and 58% increase in the short-beam strength and apparent interlaminar shear, respectively. In addition, it can be verified from morphological analysis of the fracture a change in the failure mode of the laminate by the incorporation of MWCNT. This behavior can be proven from CST test where there was no presence of the shear force by compression.

show abstract

Section: Compression Shear Test (Cst)mentioning

confidence: 99%

Processing, thermal and mechanical behaviour of PEI/MWCNT/carbon fiber nanostructured laminate

Santos

Ribeiro

Hein

et al. 2017

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…Translaminar fractures are those that occur transversely to the plane of the laminate, causing significant rupture of the fibres. Normally there are components that display the three types of fracture simultaneously [26,27].…”

Section: Assessment Of the Welding Processmentioning

confidence: 99%

Assessment of the interlaminar strength of resistance-welded PEI/carbon fibre composite

Reis

Abrahao

Costa

et al. 2017

Welding International

View full text Add to dashboard Cite

This study has as its main objective to evaluate the effectiveness of the welding process by electrical resistance in a composite poly (ether-imide) matrix reinforced with continuous fibres of carbon, from the study of the thermal and mechanical properties of the welded joint. To evaluate the thermal properties of the welded material, samples were subjected to analysis by thermogravimetry and by thermomechanical analysis. With the intention to study the resulting weld interface, studies were made from the shear tests ILSS and Iosipescu, as well as end-notched flexure (ENF). The results of the thermal analysis in laminated non-welded PEI/ carbon fibre show that the beginning of degradation for these composites is 460 °C, and it is also evident that the glass transition temperature of welded samples is about 15% higher than the results from samples not welded. The mechanical tests show that there was an increase of 32 and 20%, respectively, in interlaminar shear results for the ILSS-and Iosipescu-welded samples when they are compared to samples not welded. The ENF test results show satisfactory values of interlaminar fracture toughness in the composite welded from the values found in the literature.

show abstract

“…Fraturas translaminares são aquelas que ocorrem transversalmente ao plano do laminado, causando um significativo rompimento das fibras. Normalmente, encontram-se componentes que apresentam os três tipos de fratura simultaneamente [26,27].…”

Section: Avaliação Da Resistência Interlaminar Do Compósito Pei/fibraunclassified

Avaliação da Resistência Interlaminar do Compósito PEI/Fibras de Carbono Soldado pelo Método de Resistência Elétrica

et al. 2016

View full text Add to dashboard Cite

Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado. Evaluation of the Interlaminar Resistance of Composite PEI/Carbon Fibers Welded by Electrical Resistance MethodAbstract: This study has as main objective to evaluate the effectiveness of the welding process by electrical resistance in composite poly (éterimida) matrix reinforced with continuous fibers of carbon, from the study of the thermal and mechanical properties of the welded joint.To evaluate the thermal properties of the welded material samples were subjected to analysis by thermogravimetry and by thermomechanical analysis. With the intention to study the resulting weld interface, studies were made from the shear tests ILSS and Iosipescu, as well as end-Notched Flexure (ENF). The results of the thermal analysis in laminated PEI / carbon fiber non-welded show that the beginning of degradation for these composites is 460 °C, and it is also evident that the glass transition temperature of welded samples is about 15% higher than the results from samples not welded. In the mechanical tests show that there was an increase of 32% and 20% respectively in interlaminar shear results for the ILSS and Iosipescu welded samples, when they are compared to samples not welded. The ENF test results show satisfactory values of interlaminar fracture toughness in the composite welded from the values found in literature.

show abstract

Caracterização Mecânica de Compósitos de Poliamida/Fibra de Carbono Via Ensaios de Cisalhamento Interlaminar e de Mecânica da Fratura

Cited by 7 publications

References 24 publications

Processing, thermal and mechanical behaviour of PEI/MWCNT/carbon fiber nanostructured laminate

Processing, thermal and mechanical behaviour of PEI/MWCNT/carbon fiber nanostructured laminate

Assessment of the interlaminar strength of resistance-welded PEI/carbon fibre composite

Avaliação da Resistência Interlaminar do Compósito PEI/Fibras de Carbono Soldado pelo Método de Resistência Elétrica

Contact Info

Product

Resources

About