NONLINEAR STRESS RELAXATION BEHAVIOR OF POLYETHYLENE

Creep and Stress Relaxation Behavior of Polypropylene, Metallocene-Prepared Polyethylene and their Blends

Relaxation behavior of polyethylene welded joints

The paper presents results of the investigation of structure relaxation and thermal properties of PE-80 and PE-100 polyethylene hot-tool butt welds. It was found that a weld with the re-crystallized crystalline structure is formed during the welding of dissimilar types of polyethylene. It is shown that within a long period (1 year) the relaxation occurs not only in amorphous but also in the cry...

Comparison of Compressive Stress-Relaxation Behavior

Osteoarthritis (OA) is a common joint disorder found mostly in elderly people. The role 21 of mechanical behavior in the progression of OA is complex and remains unclear. The 22 stress-relaxation behavior of human articular cartilage in clinically defined osteoarthritic stages 23 may have importance in diagnosis and prognosis of OA. In this study we investigated differences 24 in the biomechani...

Strain-enhanced stress relaxation impacts nonlinear elasticity in collagen gels.

The extracellular matrix (ECM) is a complex assembly of structural proteins that provides physical support and biochemical signaling to cells in tissues. The mechanical properties of the ECM have been found to play a key role in regulating cell behaviors such as differentiation and malignancy. Gels formed from ECM protein biopolymers such as collagen or fibrin are commonly used for 3D cell cult...

Effects of Temperature and Loading Characteristics on Mechanical and Stress-Relaxation Behavior of Sea Buckthorn Berries. Part 3. Relaxation Behavior

Relaxation force properties of single sea buckthorn berries under uni-axial compression were studied. Sea buckthorn berries had a time dependent behavior similar to other viscoelastic materials. The three-term Maxwell model with a maximum relative difference (MRD) of % 5 ≤ was chosen as the best fit equation to the relaxation data. For both Indian Summer and Sinensis cultivars, the firmness (as...