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of stress in liquids started with Newton, who provided a differential formula for friction forces (shear stress) in parallel laminar flow. Stress is defined...

suggested that yielding begins when the octahedral shear stress reaches a critical value, i.e. the octahedral shear stress of the material at yield in simple...

the mean normal stress or hydrostatic stress. This value is the same in all eight octahedral planes. The shear stress on the octahedral plane is then τ...

_{1})^{2}=9\tau _{oct}^{2}} where τ o c t {\displaystyle \tau _{oct}} is the octahedral shear stress: τ o c t = 1 3 ( σ 1 − σ 2 ) 2 + ( σ 2 − σ 3 ) 2 + ( σ 3 − σ 1...

cleavage. Octahedral cleavage occurs when there are four cleavage planes in a crystal. Fluorite exhibits perfect octahedral cleavage. Octahedral cleavage...

dimple formation within an otherwise ductile fracture. Low stress triaxiality corresponds with shear slip and therefore larger ductility, as well as typically...

energy theory (von Mises yield criterion) also referred to as octahedral shear stress theory. – This theory proposes that the total strain energy can...

demonstrate the pressure dependence of a yield surface or the pressure-shear trajectory of a stress path. Because r {\displaystyle r} is non-negative the plot usually...

deformation twinning, in which twinning develops in a crystal in response to a shear stress, and is an important mechanism for permanent shape changes in a crystal...

strains. An octahedral plane is one whose normal makes equal angles with the three principal directions. The engineering shear strain on an octahedral plane...

recognized for its importance in low grade metamorphism, forming under shear stress accompanied by relatively low temperatures (Coombs, 1953). Julgoldite...

construction system Platonic solid Stressed skin Superleggera Tensegrity Tessellated roof Tetrahedral-octahedral honeycomb "Alexander Graham Bell". Archived...

similar to a Jahn–Teller distortion of an octahedral complex with respect to orientation about the octahedral centers. Elastic folding or pleating can...

Ru(−4), and Os(−4) have been observed in metal-rich compounds containing octahedral complexes [MIn6−xSnx]; Pt(−3) (as a dimeric anion [Pt–Pt]6−), Cu(−2),...

congeners shows significant differences from that of carbon, and thus octahedral coordination is also significant. For example, the electronegativity of...

Conversely, the 1T phase (Pearson symbol hP3) has space group P-3m1, and octahedrally-coordinated Mo; with the 1T unit cell containing only one layer, the...

associated with local stress fields. Dislocations allow shear at lower stress than that needed for a perfect crystal structure. The local stress fields result...

alignments. The c axis of the unit cell is 0.87 nm. Hydrogen atoms occupy octahedral cavities between the layers. The hydrogen layers come in vertically aligned...

lattice, such as grain boundaries, hinders flow of the material under applied stress, thereby increasing its hardness. For this reason, copper is usually supplied...

(bpy) with Cd(NO3)2. The Cd(II) centers in this MOF possess a distorted octahedral geometry having four pyridines in the equatorial positions, and two water...