Mechanical properties number themselves among the most important properties of any polymeric material used in engineering applications. The Molecular Mechanics approach has been used to calculate the mechanical
Stress–strain measurements provide a means of obtaining many of these mechanical properties for the polymeric materials. The most generally derived information from stress–strain measurements include the modulus, the brittleness, and the ultimate and yield strengths of the polymeric material. The test...
The isothermal-aging time and yield strength dependence of plane-strain fracture toughness at the as-processed H content of 60 ppm and threshold stress intensity for IHAC in H-precharged (CH-TOT=1,300 ppm) Ti–15V–3Al–3Sn stressed in moist air at 25°C. The SEM fractograph shows the...
Here, harnessing the mesh-to-graph mapping, we propose a graph-based ML general method to predict deformed shapes, stress and strain fields in material and structural systems. To demonstrate the flexibility and generality of the proposed approach, we focus on three different material systems undergo...
1. For each of the following pairs of polymers, plot and label schematic stress-strain curves on the same graph: a). Polyisoprene having a number average molecular weight of 100,000 g/mol and 10% of available sites crosslinked, polyisoprene havin...
principal stresses compared with the titanium model. Conversely, Maximum von Mises stresses in spongy bone were lower in polymeric models than those of titanium ones. Additionally maximum equivalent strain values in spongy peri-implant bone of polymeric models were also lower than those of titanium ...
Ti model showed slightly higher deformation values than polymeric models in case of oblique loading (Fig. 3o). Maximum equivalent strain of bone Max equivalent strain values of cortical and spongy bone were extracted for the three models (Titanium alloy, PEEK and PEKK) (Fig. 7). They were ...
and cooling procedures can and do introduce orientation stresses in the part that can lead to property changes. An extruded polymeric tube or sheet has a certain inherent tear strength; maximum elongation inherently creates anisotropy in the material, resulting in a decrease of performance in the un...
In plotting the expansion of a polymeric material as a function of temperature, there is a temperature at which an abrupt or significant increase in expansion occurs. This temperature, known as the glass-transition temperature (Tg), is the temperature that corresponds to the intersection of lines...
Cracking in polycarbonate: (a) isopropyl alcohol for 72 h at 1.64% strain, (b) methanol for 72 h at 1.64% strain, (c) ethylene glycol monomethyl ether for 4.5 h at 0.37% strain.[Adapted, by permission, from Al-Saidi, L; Mortensen, K; Almadal, K, Polym. Deg. Stab., 82, 451-...