Stress relaxation, creep and set recovery of elastomers

Stress–softening and recovery of elastomers

A constitutive model is developed for the mechanical response of elastomers at finite strains. A polymer is treated as a network of linear chains linked by permanent (chemical crosslinks) and temporary (entanglements and van der Waals forces) junctions. Temporary junctions are assumed to be in two states: loose (passive) when they impose only topological constrains on available configurations o...

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

Creep and Stress Relaxation Anisotropy of a Single-Crystal Superalloy

Electrostatically Driven Creep in Viscoelastic Dielectric Elastomers

We utilize a nonlinear, dynamic finite element model coupled with a finite deformation viscoelastic constitutive law to study the inhomogeneous deformation and instabilities resulting from the application of a constant voltage to dielectric elastomers. The constant voltage loading is used to study electrostatically driven creep and the resulting electromechanical instabilities for two different...

Solder Joint Creep and Stress Relaxation Dependence on Construction and Environmental-stress Parameters

Creep strain is probably the most important time-dependent damage accrual factor affecting solder joint reliability. Under typical multi-hour loading conditions, creep-induced strain is a complex time per cycle, the system. function of solder metallurgical structure, solder temperature, loading applied stress, and the spring constant of the combined part/lead/board The complex system level cree...