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Testing of mechanical properties in fibrous products

100%

Muller Z.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1978

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tom 203

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An investignation on the relation between the geometrical dimensions and the stability of wheat-stalk

100%

Muller Z.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1989

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tom 378

The lodging of wheat-stalk is caused by weather factors (wind, storm, rain) which subject the stalk to compressive, shearing, bending and torsional stresses. In the respect of growing, such wheat varieties are advantageous which better tolerate stresses which means they are stable against lodging. The purpose of investigations was to gather data on the mechanical and geomertical properties of different varieties of wheat, and further to determine - on the basis of the obtained results - such a numerical value of stability of wheat which can be used for the grading of certain sorts of wheat with respect to stability. In this paper I give an account of my investigation methods and of my measuring results. I give the relation between the average external diameter and the bending rigidity of the wheat-stalk.. I define a so-called "stability stresses factor" (st) for qualifying the stalk-stability of wheat varieties using the Euler's relationship of the deflection stress. In the respect of the stalk-stability, certain varieties of wheat can be characterized and graded by this numerical value. I can give useful information, especially for the growers and improvers of wheat. The lodging of wheat is caused by weather-factors (wind, storm, rain) which subject the stalk to compression, shearing, bending and torsion stress. Besides lodging the stability of the wheat-stalk is influenced also by the geometric dimensions, the bending and torsional rigidity, just as by the bending and torsional strength. The purpose of my investigation is to research the geometric and mechanic features of various sorts of wheat and to determine, on the basis of the results, such a value, by which certain wheat-varieties can be graded in the respect of stability. The wheats tested derive from the institute of plant improvement in Martonvásár [l, 2].

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Classification of rheological models composed of spring and dashpots. The Proceedings of the Symposium on Soil Mechanics organized in Godollo by Lublin Institute of Agrophysics of Polish Academy of Sciences and the Chair of Mechanics of Godollo Agricultural University, in May 1974

100%

Muller Z.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1976

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tom 168

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Determination of the physical properties of wheat stalks

63%

Skubisz G., Muller Z.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1991

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tom 389

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Results of bending-breaking investigation of rape stalk

63%

Skubisz G., Muller Z.

Zeszyty Problemowe Postępów Nauk Rolniczych

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1991

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tom 397

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Wstępne wyniki transplantacji mrożonych zarodków koni w Republice Czeskiej

63%

Muller J., Muller Z.

Prace Komisji Nauk Rolniczych, Leśnych i Weterynaryjnych. Polska Akademia Umiejętności

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2014

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tom 20

Ograniczanie wyników

5 Zeszyty Problemowe Postępów Nauk Rolniczych

1 Prace Komisji Nauk Rolniczych, Leśnych i Weterynaryjnych. Polska Akademia Umiejętności

6 Muller Z.

2 Skubisz G.

1 Muller J.

1 2014

2 1991

1 1989

1 1978

1 1976

Testing of mechanical properties in fibrous products

An investignation on the relation between the geometrical dimensions and the stability of wheat-stalk

Classification of rheological models composed of spring and dashpots. The Proceedings of the Symposium on Soil Mechanics organized in Godollo by Lublin Institute of Agrophysics of Polish Academy of Sciences and the Chair of Mechanics of Godollo Agricultural University, in May 1974

Determination of the physical properties of wheat stalks

Results of bending-breaking investigation of rape stalk

Wstępne wyniki transplantacji mrożonych zarodków koni w Republice Czeskiej