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HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

The aim of the present study is to measure complex shapes of tested objects by using a priori information given by their CAD model via stereocorrelation. To follow a 3D object during its deformation and to determine 3D surface displacement elds, a rst measurement of the object shape is necessary. It is achieved by updating the CAD reference via a global approach to stereocorrelation. Once the 3D shape has been determined, the next step is to measure 3D displacement elds during loading. The kinematics of the deformed shape is assumed to be written within the same isogeometric framework. Isogeometric stereocorrelation is applied to analyze a compression test on a ribbed cylinder in two dierent congurations of the stereo rig.

Four biofiber materials were compared against wood flour for their ability to act as reinforcing fillers in melt-blended composites with polypropylene as the matrix polymer. The four materials were a waste wood composite (mixture of plywood, particleboard, and fiberboard), kenaf core, a waste jute-polyester composite panel, and waste newspaper. The composites were prepared either by extrusion or by blending in a high intensity thermokinetic mixer (K-mixer), and mechanical prop erties were determined on injection molded specimens. Although some property differences were observed compared to wood flour/polypropylene composites, it appeared that any of the four materials might substitute for wood flour if local supply and cost circumstances offered advantages. However, waste newspaper clearly provided the best balance of mechanical properties relative to the other three test materials or wood flour. Relative to wood flour, waste newspaper filler increased unnotched impact by over 30 percent and flexure and tensile strengths by about 25 percent.