creep – TechConnect Briefs

Microcharacterization of Creep Behavior of Carbon Nanofiber Reinforced HDPE Nanocomposites using a Depth Sensing Method

Xu S., Liu T., Tangpong X.W., Akhatov I., Zhong W-H., North Dakota State University, US

Depth-sensing indentation at micro- and nano-scale levels is a useful tool for material characterization due to its simplicity. There are many well-established methods for determining local mechanical properties including elastic modulus, hardness, and fracture toughness [...]

POSS–Substituted Hyperbranched Polyester Blends with Thermoplastic Polyurethanes

Spoljaric S., Shanks R.A., RMIT University, AU

The aim of this research is to prepare and disperse in an elastomer a multi-branched form of POSS. Hyperbranched polymers (HBP) can be formed by grafting from a central core. POSS may be joined with [...]

Predicting the Positive Effects of Combined Metallurgical and Thermo-Mechanical Impacts on the Reliability of Solder Joint Interconnections

Khoshnaw F.M., LU, UK

Generally speaking, solder joints fail due to both fatigue and creep. Therefore both mechanisms are strongly considered by designers and manufacturers as an important design criteria. However, since most designers take parameters individually, their designs [...]

Modeling hysteresis and creep characteristics of a carbon-nanotube-reinforced electroactive actuator

Sohn K., Shin S.R., Yi B-J, Kim S.I., Kim S.J., Kim S.I., Kim S.J., Hanyang University, KR

For smart materials that are useful in wide variety of applications such as microelectromechanical systems (MEMS), machine components, and artificial muscle, the nonlinear phenomena of hysteresis and creep are essential consideration. We investigated movement of [...]

Computational Modeling with a New Lattice-Based Continuum Formulation for the Coupled Thermodynamic and Mechanical Equilibrium of Polycrystalline Solids

Bassman L., Garikipati K., Deal M., Stanford University, US

A new formulation and computational framework is presented for modeling coupled self-diffusion and mechanics in polycrystalline materials. The continuum formulation includes constitutive models derived from lattice-level thermodynamic and mechanical considerations. From a complete statement of [...]