The continuously annealed low-carbon-steel strips from industrial production showed an average aging index of about 30 N/mm². This increase in yield strength caused by the continuous-annealing process was strongly dependent on soaking temperature and time. Whilst optimization overaging parameters use a higher annealing would reduce ageing susceptibility strips, it considered unlikely that its m...

Demographic dynamics have strong repercussions for development and need to be addressed in the defi nition of the global development strategy for post 2015. Despite divergent trends across countries, international migration off ers no defi nitive solution. A comprehensive approach is needed. Countries with declining and ageing workforces need to sustain or raise productivity. Countries with gro...

We study the first passage dynamics of an ageing stochastic process in the continuous time random walk (CTRW) framework. In such CTRW processes the test particle performs a random walk, in which successive steps are separated by random waiting times distributed in terms of the waiting time probability density function t t ( ) 1 ψ ≃ α − − (0 2 α ⩽ ⩽ ). An ageing stochastic process is defined by ...

key words: Textile conservation, black-dyed silk, tensile test, compression resilience, accelerated ageing To propose a new non-destructive assessment procedure for historic Suga-yarns using the “Kawabata Evaluation System (KES)”, compression resilience (RC) was compared with tensile breaking strain, which is traditionally used to measure mechanical properties of yarns. Modern raw silk yarns dy...

A major objective of the theory of defects is to relate the mechanical behaviour of macroscopic materials to the spatio-temporal evolution of the microstructure. The present paper deals with the dislocation-dynamical foundations of plastic instabilities and the propagation of slip in coherent plastic deformation modes (solitary plastic waves). Solitary waves arise from a proper balance between ...

1. AGEING Ageing is an integral, natural part of life. The way in which we grow old and experience this process, our health and functional ability all depend not only on our genetic makeup, but also (and importantly) on what we have done during our lives; on what sort of things we have encountered in the course of our lifetime; on how and where we have lived our lives. Lifespan is defined as th...

Dynamic compressive stress-strain curves at various strain rates of an EthylenePropylene-Diene Monomer Copolymer (EPDM) rubber have been determined with a modified split Hopkinson pressure bar (SHPB). The use of a pulse-shaping technique ensures that the specimen deforms at a nearly constant strain rate under dynamically equilibrated stress. The validity of the experiments was monitored by a hi...

differences between stress-based and strain-based criteria are investigated in seismic performance evaluation of the arch dams in time domain. a numerical model of the coupled dam-reservoir-foundation system is prepared with the finite element technique. reservoir is modeled using the eulerian approach as a compressible domain, and the foundation rock is assumed to be massless. dynamic equilibr...