We have used kinetic Monte Carlo simulations to study the kinetics of unfolding of cross-linked polymer chains under mechanical loading. As the ends of a chain are pulled apart, the force transmitted by each cross-link increases until it ruptures. The stochastic cross-link rupture process is assumed to be governed by first order kinetics with a rate that depends exponentially on the transmitted...

We investigate the behavior of magnetoactive elastomers (MAEs) with periodic and random distributions of circular and elliptical fibers. For the MAEs with periodic microstructures, we develop finite element models and determine the local fields as well as the effective properties of MAEs with rectangular and quasi-hexagonal unit cells. For the MAEs with random microstructures, we derive a close...

OBJECTIVE To examine the relationship between public perceptions of key performance indicators assessing various aspects of the health-care system. DESIGN Cross-sequential survey research. Annual telephone surveys of random samples of adult Albertans selected by random digit dialing and stratified according to age, sex and region (n = 4000 for each survey year). The survey questionnaires incl...

In recent years, some countermeasures against Differential Power Analysis (DPA) at the logic level have been proposed. At CHES 2005 conference, Popp and Mangard proposed a new countermeasure named Masked Dual-Rail Pre-Charge Logic (MDPL) which combine dual-rail circuits with random masking to improve Wave Dynamic Differential Logic (WDDL). The proposers of MDPL claim that it can implement secur...

Previous research has suggested that the separate aspects of executive functioning are differentially affected by ecstasy use. Although the inhibition process appears to be unaffected by ecstasy use, it is unclear whether this is true of heavy users under conditions of high demand. Tasks loading on the updating process have been shown to be adversely affected by ecstasy use. However, it remains...

This paper develops an assessment methodology based on vibration tests and finite element analysis (FEA) to predict the fatigue life of electronic components under random vibration loading. A specially designed PCB with ball grid array (BGA) packages attached was mounted to the electro-dynamic shaker and was subjected to different vibration excitations at the supports. An event detector monitor...

Composites made from two linear isotropic elastic materials are considered. It is assumed that only the volume fraction of each elastic material is known. The composite is subjected to a uniform hydrostatic strain. For this case lower bounds on all rth moments of the dilatational strain field inside each phase are obtained for r ≥ 2. A lower bound on the maximum value of the dilatational strain...

This paper presents a hybrid Galerkin/perturbation approach based on Radial Basis Functions for the dynamic analysis of mechanical systems affected by randomness both in their parameters and loads. In specialized literature various procedures are nowadays available to evaluate the response statistics of such systems, but sometimes a choice has to be made between simpler methods that could provi...

• The accuracy of two fatigue criteria for multiaxial random loading is discussed. Fatigue tests related to 10NHAP steel and available in the literature are simulated. lifetime crack initiation path estimated through present criteria. agreement between experimental data theoretical results satisfactory. compared with those determined three In paper, capability both estimating life predicting me...