A new approach to analyze the dynamic strength of eggs.
The mechanical behavior of eggshell was determined in terms of average rupture force and corresponding deformation. For the experiment, we selected goose eggs (Anser anser f. domestica). Samples of eggs were compressed along their x-axis and z-axis. The effect of the loading orientation can be described in terms of the eggshell contour curvature. Two different experimental methods were used: compression between two plates (loading rates up to 5 mm/s) and the Hopkinson split pressure bar technique. This second method enables achieving loading rates up to about 17 m/s. The response of goose eggs to this high loading rate was characterized also by simultaneous measurement of the eggshell surface displacements using a laser vibrometer and by the measurement of both circumferential and meridian strains.
Institute of Thermomechanics of the Czech Academy of Sciences, Dolejškova 5, 182 00, Prague, Czech Republic.
Jan
J
Trnka
Department of Food Technology, Mendel University in Brno, Zemědělská 1, Brno, Czech Republic.
Šárka
Š
Nedomová
Department of Technology and Automobile Transport (Section Physics), Mendel University in Brno, Zemědělská 1, Brno, Czech Republic. vojtech.kumbar@mendelu.cz.
Vojtěch
V
Kumbár
Department of Technology and Automobile Transport (Section Physics), Mendel University in Brno, Zemědělská 1, Brno, Czech Republic.
Michal
M
Šustr
Department of Technology and Automobile Transport (Section Physics), Mendel University in Brno, Zemědělská 1, Brno, Czech Republic.
Jaroslav
J
Buchar
D000818:Animals; D019245:Compressive Strength; D005777:Geese; D008422:Materials Testing / Q000379:methods*; D055595:Mechanical Phenomena; D010063:Ovum; D011312:Pressure; D013314:Stress, Mechanical
Compression; Dynamic loading; Eggs; HSPB technique; Rupture force