In Cartesian coordinates, DNA is a space curve with centerline and directors that results from the accumulation of bend, shear, Twist and Rise as a function of s i.
Experimental spot weld failure loads under combined opening and shear loading conditions and those under combined shear and twisting loading conditions are shown to be characterized well by the proposed failure criterion.
A noteworthy result is that the effective compression modulus of the analyzed structures is equal to two thirds of the Young modulus of the stiffest isotropic elastic networks currently available in the literature, being accompanied by zero-rigidity against infinitesimal shear and twisting mechanisms.
Some authors have postulated that these fractures result from direct impact with the knee in a flexed position, while others have attributed the fracture to simultaneous vertical shear and twisting forces [ 5, 7].
In this case, the coupling between tension, flexure, shearing and twisting takes place.
The helioseismic observations provide important clues for understanding the mechanisms of the formation of sunspots and active regions, and the subphotospheric dynamics of convective flows shearing and twisting magnetic fields in the corona.
Solid samples of San Carlos olivine + 4.5 vol.% FeS were compressed in the HPXMT apparatus, heated, and then sheared by twisting the upper and lower Drickamer anvils, under the conditions (1.5 GPa and 1373 K) where Fe-S was liquid and olivine remained solid.
It will be shown herein that the proposed element is able to accurately predict the shear forces and twisting moments as well as the transverse shear stresses across the thickness of a laminated composite plate.
Asymptotic solutions to a class of problems pertaining to the stress fields in the neighborhood of a circular cylindrical partially debonded infinitely rigid fiber (inclusion) in a homogeneous isotropic linearly elastic matrix (plate), subjected to far-field extension-bending (mode I), inplane shear-twisting (mode II) and torsional (mode III) loadings, are presented.
The shear parallel and anti-shear twists that are observed at larger extensions are attributed to asymmetries in the sample yield surfaces; these are tilted in the negative and positive shear directions according to whether prior shearing was carried out at low or at elevated homologous temperatures, respectively.
