Influence of additives on the global mechanical behavior and the microscopic strain localization in wood reinforced polypropylene composites during tensile deformation investigated using digital image correlation

Godara, A.; Raabe, Dierk; Bergmann, I.; Putz, Robert; Müller, Ulrich

doi:10.1016/j.compscitech.2008.08.031

Cited by 60 publications

(47 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Aunque también, esta diferencia podría ser atribuida a la desigual estructura química de las super cies de las paredes celulares de la corteza y de la madera, algunas investigaciones reportan que esta diferencia química podría afectar la cristalización de la matriz termoplástica (material semicristalino), en consecuencia, la rigidez del compuesto (Harper y Wolcott 2004, Rowell et al 2005, Demir et al 2006, Boua f et al 2009b, Ngueho et al 2010. Sin embargo, otros autores indican que la presencia de los grupos OH en la madera y en cualquier otro tipo de tejido vegetal, no compatibilizan químicamente con los grupos hidrofóbicos presentes en las polioleo nas, como en los termoplásticos (Yin et al 2001, Guo et al 2004, Gardner et al 2008, Godara et al 2009). La discusión anterior requiere la comprobación de la existencia de una diferente formación de la microestructura en la interfase harina-matriz termoplástica, según el tipo de harina y la historia térmica del compuesto.…”

Section: Figura 1 Curvas Promedio De Esfuerzo-deformación De Los Comunclassified

Propiedades físicas y mecánicas de compuestos de polietileno reciclado y harinas de corteza y madera de Pinus radiata fabricados mediante moldeo por inyección

Villablanca¹,

Wilson

Hurtado³

2012

Maderas, Cienc. tecnol.

View full text Add to dashboard Cite

RESUMENSe ensayaron compuestos de polietileno de baja densidad reciclado y harina de madera y de corteza de Pinus radiata D. Don, para evaluar el efecto del contenido de harina y la densidad del compuesto sobre la absorción de agua e hinchamiento, dureza Rockwell, resistencia a la tracción y módulo de elasticidad en tracción. Estos compuestos fueron fabricados mediante moldeo por inyección y sin aditivos, en proporciones harina/polietileno de 20/80, 40/60 y 60/40 peso/peso. Se determinaron varias propiedades físicas y mecanicas de los compuestos. Los resultados fueron sometidos a pruebas de comparación de medias y Análisis de Regresión Lineal Múltiple (ARLM), seguido por el método paso a paso o Stepwise (SWM). Los resultados indican que las propiedades físicas aumentaron con el incremento harina, al igual que la rigidez de los compuestos, mientras que la resistencia a la tracción y a la penetración tendieron a disminuir. Los compuestos con harina de corteza fueron más rígidos, absorbieron menos agua y se hincharon menos que los compuestos con harina de madera, en cambio, no se observaron diferencias estadísticas en la dureza, y sólo el compuesto con 20% de harina de corteza presentó mayor resistencia a la tracción que el resto de los compuestos. El contenido de harina fue la variable que más afecta las propiedades evaluadas, excepto para el E y la dureza de los compuestos con harina de madera, las que fueron mayormente afectadas por su densidad. Palabras clave:Compuesto, corteza, madera, inyección, sin aditivos, polietileno. ABSTRACTComposites made of recycled low density polyethylene and wood or bark our of Pinus radiata D. Don were tested, the e ect of the our content and density of the composites on physical and mechanical properties were determinated. ese both types of composites were prepared by injection moulding and without chemical additives at 20/80, 40/60 and 60/40 of our/polyethylene (w/w). Several physical and mechanical properties were measured. e results were tested for comparison of means and Multiple Linear Regression Analysis (ARLM), followed by the method stepwise (SWM). e results indicate that the physical properties and the E increased with increasing our content, while the tensile strength and the hardness tended to decline. e composites made with bark our had higher sti ness, absorbed less water and swelled less, and show similar hardness than the composite made with wood our, but only the composite with 20% (w/w) of bark our showed greater tensile strength than the others composites. e content of our was the variable that most a ects the properties evaluated, except to the E and the hardness of the wood our composites, they were most a ected by their density. Keywords INTRODUCCIÓNLos materiales compuestos fabricados en base a mezclas de plásticos sintéticos y harinas o bras vegetales, son de creciente interés en la ciencia e ingeniería de materiales. También, los plásticos reciclados han sido considerados para fabricar nuevas formulaciones de materiales compuestos, debido principalmente ...

show abstract

Section: Figura 1 Curvas Promedio De Esfuerzo-deformación De Los Comunclassified

Propiedades físicas y mecánicas de compuestos de polietileno reciclado y harinas de corteza y madera de Pinus radiata fabricados mediante moldeo por inyección

Villablanca¹,

Wilson

Hurtado³

2012

Maderas, Cienc. tecnol.

View full text Add to dashboard Cite

show abstract

“…This is motivated by recent literature indicating strain concentration due to the microstructure of the material [35] or the formation of internal cracks [36]. However, for the existence of strain concentrations at a certain load level, there are several options how these indications may relate to the formation of (micro-) cracks on the interior of the material.…”

Section: Strain Concentrationmentioning

confidence: 99%

Digital Image Correlation

Sause

2016

In Situ Monitoring of Fiber-Reinforced Composites

View full text Add to dashboard Cite

In order to detect the occurrence of failure in a material, visual observation is a very intuitive approach. Although global failure is many times easier to observe visually, more dedicated analysis is required to detect small changes indicating the occurrence of first failure. One specific type of visual observation follows the idea to track and measure changes between subsequently acquired images of an object. The concept used for that purpose is based on digital image acquisition of a moving and deforming object and is known as digital image correlation (DIC). The background of this technique stems from the basic principles of optics, perspective imaging, and digital image analysis.The aim of this chapter is not to cover all aspects of the topic of DIC, but to introduce the key concepts and point out the relevant principles for measurement of strain fields of solid materials. For the interested reader, a comprehensive review on the topic is given by Sutton, Orteu, and Schreier [1] and a concise review on the application of 2D-DIC is also found in [2].One of the first attempts to use image correlation as a measurement technique to register features in images of different views was made by Hobrough in the 1950s. A few years later in 1961 he also developed a system to perform first quantitative positional measurements extracted from an image correlation process. With the availability of digitized images as provided by CMOS or CCD cameras in the 1960s and 1970s until the present days the branch of vision-based algorithms with a focus on DIC techniques has become a growing field of research. The development of the algorithms of the DIC method is driven by the accompanying applications in material science. Since the first experimental application in materials science by Peters and Ranson in 1982 [3], many experimental studies in the field of fiber reinforced composites were accompanied by DIC as a measurement technique [4][5][6][7][8][9][10][11][12]. In recent decades, suitable approaches have been developed to measure deformations with high magnification (e.g., inside a scanning electron microscope) and high-speed camera systems have been used to allow digital image correlation during high strain rate testing [13,14].

show abstract

“…This latter technique has been widely used last decade in several applications [26][27][28][29]. The advantages and implementation of DIC technique are addressed in literature [30,31].…”

Section: Introductionmentioning

confidence: 99%

Improving the characterization of a hardening law using digital image correlation over an enhanced heterogeneous tensile test

Haddadi

Belhabib

2012

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

Influence of additives on the global mechanical behavior and the microscopic strain localization in wood reinforced polypropylene composites during tensile deformation investigated using digital image correlation

Cited by 60 publications

References 16 publications

Propiedades físicas y mecánicas de compuestos de polietileno reciclado y harinas de corteza y madera de Pinus radiata fabricados mediante moldeo por inyección

Propiedades físicas y mecánicas de compuestos de polietileno reciclado y harinas de corteza y madera de Pinus radiata fabricados mediante moldeo por inyección

Digital Image Correlation

Improving the characterization of a hardening law using digital image correlation over an enhanced heterogeneous tensile test

Contact Info

Product

Resources

About