Methods for Determining the Strength of Brittle Materials in Compressive Stress States

1976 ◽  
Vol 4 (6) ◽  
pp. 383 ◽  
Author(s):  
RL Meltzer ◽  
YR Fiorini ◽  
RT Horstman ◽  
IC Moore ◽  
AL Batik ◽  
...  
Keyword(s):  
Compressive Stress ◽  
Brittle Materials ◽  
Stress States

Research on the Ductile Chip Formation in Grinding of Brittle Materials

2011 ◽  
Vol 487 ◽  
pp. 58-62
Author(s):  
Yun Feng Peng ◽  
Zhi Qiang Liang ◽  
Yong Bo Wu ◽  
Yin Biao Guo ◽  
T. Jiang ◽  
...  
Keyword(s):  
Shear Stress ◽  
Compressive Stress ◽  
Chip Formation ◽  
Thrust Force ◽  
Brittle Materials ◽  
Chip Thickness ◽  
Force Model ◽  
Theoretical Discussion ◽  
Undeformed Chip Thickness ◽  
Formation Zone

A theoretical discussion has been presented for the ductile chip formation in grinding of brittle materials. The single abrasive grit was dealt with a top-rounded cutter removing material of varying undeformed chip thickness. The force model in the chip formation zone was established. The stress analysis showed that larger compressive stress and shear stress can be generated in the chip formation zone, which shields the growth of pre-existing flaws in the material by suppressing the stress intensity factor. When the stress intensify factor is smaller than fracture toughness and the resolved shear stress exceeds the critical flow stress of the material, the ductile chip is formed. Experiments of monocrystal silicon grinding were conducted. The results show that the thrust force is much larger than the cutting force, which ensures the larger compressive stress in the chip formation zone and the formation of ductile chip.

On the Influence of Uniform Stress States on the Natural Frequencies of Spherical Shells

1962 ◽  
Vol 29 (3) ◽  
pp. 502-505 ◽  
Author(s):  
R. R. Archer
Keyword(s):  
Spherical Shell ◽  
Compressive Stress ◽  
Shallow Shell ◽  
Natural Frequencies ◽  
Numerical Results ◽  
Uniform Stress ◽  
Spherical Shells ◽  
Transverse Vibrations ◽  
Stress States ◽  
General Frequency

The influence of uniform tensile and compressive stress states on the natural frequencies of transverse vibrations for shallow spherical shell segments is determined from the general equations for elastokinetic shallow shell problems with longitudinal inertia terms neglected. General frequency determinants are derived and detailed numerical results obtained for a range of shell geometries and stress states.

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