Results 11 to 20 of about 776 (115)

Using intervention mapping to develop evidence-based toolkits that support workers on long-term sick leave and their managers

BMC Health Services Research, 2023
Background Managing long-term sickness absence is challenging in countries where employers and managers have the main responsibility to provide return to work support, particularly for workers with poor mental health.
Veronica Varela-Mato, Holly Blake, Joanna Yarker, Kate Godfree, Guy Daly, Juliet Hassard, Caroline Meyer, Charlotte Kershaw, Steven Marwaha, Kristina Newman, Sean Russell, Louise Thomson, Fehmidah Munir   +12 more
doaj   +1 more source

Return mapping scheme for the Hoek-Brown model with tension cut-off

Acta Polytechnica CTU Proceedings, 2023
The present paper revisits a stress update procedure for the Hoek-Brown plasticity model enhanced by a Rankine type of tension cut-off failure criterion.
Tereza Žalská, Michal Šejnoha
doaj   +1 more source

RETURN MAPPING FOR CREEP AND PLASTICITY SPLIT [PDF]

Blucher Mechanical Engineering Proceedings, 2014
Within the range of validity of the small strain theory, the strain is additively decomposed in an elastic or reversible strain and an inelastic or irreversible strain.The inelastic strain consists of a plastic component quickly developed under loading, and a viscous or creep component develops that slowly under loading.Most frequently, both components
Vı́ctor D. Fachinotti, Alejandro E. Albanesi, Alberto Cardona   +2 more
openaire   +1 more source

Extended subloading surface model based on multiplicative finite strain elastoplasticity framework: constitutive formulation and fully implicit return-mapping scheme

Nihon Kikai Gakkai ronbunshu, 2017
This paper presents a finite strain elastoplastic constitutive model incorporating the extended subloading surface concept within the unconventional plasticity framework for cyclic loadings. This is a reformulated and extended version of the small strain
Takuya IGUCHI, Yuki YAMAKAWA, Koichi HASHIGUCHI, Kiyohiro IKEDA   +3 more
doaj   +1 more source

Numerical Implementation of the Barcelona Basic Model Based on Return-Mapping Integration

Applied Sciences, 2022
This paper implemented the Barcelona basic model (BBM) into the OpenGeoSys (OGS) platform for numerical modeling of the coupled hydro-mechanical (HM) behavior of unsaturated soil.
Zhenxing Ji, Haiyang Yi, Gen Li, Bingbing Liu, Zhide Wu   +4 more
doaj   +1 more source

A re-formulation of extended subloading surface model for cyclic plasticity within small strain framework: hyperelastic-based formulation and fully implicit return-mapping scheme

Nihon Kikai Gakkai ronbunshu, 2016
This paper presents a re-formulation of the extended subloading surface model within the ‘unconventional plasticity’ concept applicable to cyclic loadings. The small strain theory is adopted in the model formulation.
Takuya IGUCHI, Yuki YAMAKAWA, Kiyohiro IKEDA   +2 more
doaj   +1 more source

Elastoplastic deformation analysis by return-mapping and consistent tangent modulus tensor based on subloading surface model (2st Report, Deformation analyses of machine elements)

Nihon Kikai Gakkai ronbunshu, 2014
The implicit stress integration algorithm was devised in the first report by formulating the return-mapping based on the cutting-plane projection and the consistent tangent modulus tensor due to the numerical method for the subloading surface model.
Noriyuki SUZUKI, Koichi HASHIGUCHI, Masami UENO   +2 more
doaj   +1 more source

Elastoplastic analysis by complete implicit stress-update algorithm based on the extended subloading surface model

Nihon Kikai Gakkai ronbunshu, 2016
Elastoplastic analysis of solid structures under cyclic loadings is increasingly required in recent years. To this end, it is necessary to adopt elastoplastic model capable of describing cyclic loading behavior and to employ stress integration algorithm ...
Takuya ANJIKI, Masanori OKA, Koichi HASHIGUCHI   +2 more
doaj   +1 more source

A return mapping algorithm for isotropic elastoplasticity

International Journal for Numerical Methods in Engineering, 1994
AbstractA return mapping algorithm is presented for the numerical time integration of the constitutive equations for elastoplasticity with isotropic yield surfaces, constructed from all three invariants of the stress tensor. Based on the first‐order backward Euler difference formula (BDF), the governing equations for the stresses are solved in the ...
Matzenmiller, Anton, Taylor, Robert
openaire   +3 more sources

Airborne Lidar: Advances in Discrete Return Technology for 3D Vegetation Mapping

Remote Sensing, 2011
Conventional discrete return airborne lidar systems, used in the commercial sector for efficient generation of high quality spatial data, have been considered for the past decade to be an ideal choice for various mapping applications.
Valerie Ussyshkin, Livia Theriault
doaj   +1 more source