000021355 001__ 21355
000021355 005__ 20170522124350.0
000021355 04107 $$aeng
000021355 046__ $$k2017-05-15
000021355 100__ $$aKulhavý, P.
000021355 24500 $$aALTERNATIVE POSSIBILITIES OF BIAXIAL TESTING OF FIBER AND FABRIC MATERIALS IN NONSTANDARD CONDITIONS

000021355 24630 $$n23.$$pEngineering Mechanics 2017
000021355 260__ $$bBrno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics, Brno
000021355 506__ $$arestricted
000021355 520__ $$2eng$$aThe commonly used static uniaxial tensile tests don’t describe the properties of materials based on fibers sufficiently therefore a biaxial test has been utilized. An important requirement is to conduct the test also at significantly higher speeds and under various climatic conditions; due to sensitivity of fibrous materials to climatic influences, in particular temperature and humidity. This is for existing testing devices point where we encounter two significant insufficiencies. Firstly they have limited speed and maximal loading force. Secondly, their use for testing under extreme climatic conditions is almost impossible due to their usually electronic control. The aim of this work was to propose appropriate experimental facilities using only two engines instead of the usually required four that would be able to work at higher speed, under climatic loading and in limited space. Based on these findings a testing mechanism that can be placed in an external box of climate chambers connected to a laboratory hydrodynamic-circuit has been created. This method utilizes a sliding displacement of the jaws controlled with inner forces in a tested sample and four springs. Increased sensitivity of fibrous materials to the speed of strain and climatic conditions were detected during following experiments. Compared with other used tests, the concept seems to be sufficiently precise.

000021355 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021355 653__ $$aFibers, Biaxial loading, Multiaxial stress, Ortotropic materials, Climatic loading.

000021355 7112_ $$aEngineering Mechanics 2017$$cSvratka, CZ$$d2017-05-15 / 2017-05-18$$gEM2017
000021355 720__ $$aKulhavý, P.$$iPetrů, M.$$iSyrovátková, M.
000021355 8560_ $$ffischerc@itam.cas.cz
000021355 8564_ $$s1080936$$uhttps://invenio.itam.cas.cz/record/21355/files/0562.pdf$$yOriginal version of the author's contribution in proceedings, page 562, section SOL.
000021355 962__ $$r21225
000021355 980__ $$aPAPER