Investigator: prof. RNDr. Zdeněk Knésl, CSc.
Number of Project: 101/05/0227
Agency: Czech Science Foundation
Duration: 01. 01. 2005 - 31. 12. 2007

The project leads to the field of fracture mechanics study of polyolephines using for composite’s pipes. The main goal of the project is to study the relationships between loading conditions (temperature, testing speed and stress state respectively) and failure processes from the stand point of supermolecular structure of polyolephines. In the scope of the project the laboratory tests utilising the fracture mechanics approach will bee modified for the polyolephine composite’s pipes. The correlation between the experimental data and results of relevant numerical model will be presented. The results enable to estimate the material’s composition with respect to the optimal mechanical properties of final product – pipe.

Majer, Z., Hutař, P., Náhlík, L., Knésl, Z., Influence of particle-matrix interphase on stress distribution in particulate composite with polymer matrix, Applied and Computational Mechanics, Vol.1, 143-148, 2007

Klusák, J., Knésl, Z., Náhlík, L. Crack initiation criteria for singular stress concentrations, Part II: Stability of sharp and bi-material notches, Vol. 14, No. 6, pp. 409-422, 2007

Knésl, Z., Klusák, J., Náhlík, L. Crack initiation criteria for singular stress concentrations, Part I: A universal assessment of singular stress concentrations, Vol. 14, No. 6, pp. 399-408, 2007