Abstract

Based on basic deformation mechanism of jointed food mass, combining loading and unloading concept of classical mechanics, we explored the practicability of classical loading and unloading criterion and proposed the principle is not suitable for deformation mechanism of jointed food mass, initially put forward the loading and unloading criterion for jointed food mass. We conducted the model test of unloading food mass. In order to reflect the jointed food mass properties, embedded-film technique is applied in model test. Food mass under unloading condition showed compression-shear failure. When the angle between jointed plane and unloading direction is 40° or 60°, the failure will be along the jointed plane. Finally, we proposed the unloading strength criterion.

Keywords:

Food mass, model test, strength criterion,

References

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   PMid:12580783    
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Competing interests

The authors have no competing interests.

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Copyright

The authors have no competing interests.