65 research outputs found
Evaluation of nonlocal approaches for modelling fracture near nonconvex boundaries
Integral-type nonlocal damage models describe the fracture process zones by
regular strain profiles insensitive to the size of finite elements, which is
achieved by incorporating weighted spatial averages of certain state variables
into the stress-strain equations. However, there is no consensus yet how the
influence of boundaries should be taken into account by the averaging
procedures. In the present study, nonlocal damage models with different
averaging procedures are applied to the modelling of fracture in specimens with
various boundary types. Firstly, the nonlocal models are calibrated by fitting
load-displacement curves and dissipated energy profiles for direct tension to
the results of mesoscale analyses performed using a discrete model. These
analyses are set up so that the results are independent of boundaries. Then,
the models are applied to two-dimensional simulations of three-point bending
tests with a sharp notch, a V-type notch, and a smooth boundary without a
notch. The performance of the nonlocal approaches in modelling of fracture near
nonconvex boundaries is evaluated by comparison of load-displacement curves and
dissipated energy profiles along the beam ligament with the results of
meso-scale simulations. As an alternative approach, elastoplasticity combined
with nonlocal or over-nonlocal damage is also included in the comparative
study
CDPM2: A damage-plasticity approach to modelling the failure of concrete
A constitutive model based on the combination of damage mechanics and
plasticity is developed to analyse the failure of concrete structures. The aim
is to obtain a model, which describes the important characteristics of the
failure process of concrete subjected to multiaxial loading. This is achieved
by combining an effective stress based plasticity model with a damage model
based on plastic and elastic strain measures. The model response in tension,
uni-, bi- and triaxial compression is compared to experimental results. The
model describes well the increase in strength and displacement capacity for
increasing confinement levels. Furthermore, the model is applied to the
structural analyses of tensile and compressive failure.Comment: arXiv admin note: text overlap with arXiv:1103.128
Attitudes About Sex and Marital Sexual Behavior in Hai Duong Province, Vietnam
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/74926/1/j.1728-4465.2005.00047.x.pd
Surveying adolescent sexuality : the Asian experience
For more about the East-West Center, see http://www.eastwestcenter.org/</a
Cross-national comparison and the importance of sub-groups within countries
For more about the East-West Center, see http://www.eastwestcenter.org/</a
Survey sheds new light on marriage and sexuality in the Philippines
For more about the East-West Center, see http://www.eastwestcenter.org/According to the 1994 Young Adult Fertility and Sexuality Study (YAFS-II), most of the sexual activity reported by young people in the Philippines takes place within the context of a committed relationship. Such relationships usually pass through a continuum leading to some form of traditional or formally sanctioned marriage. These results suggest that "marital status" is a rather poor basis for deciding whether to provide or withhold family planning and reproductive health services
The Timing of union formation and sexual onset : Asian evidence from young adult reproductive health surveys
For more about the East-West Center, see http://www.eastwestcenter.org/</a
An Asian comparative description of events in the transition to adulthood
For more about the East-West Center, see http://www.eastwestcenter.org/</a
The national youth populations of Asia : long-term change in six countries
For more about the East-West Center, see http://www.eastwestcenter.org/</a
Materials for the demographic history of Southeast Asia
For more about the East-West Center, see http://www.eastwestcenter.org/</a
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