A5012311776- Metal Forming Simulation Techniques
- Metallurgy and Material Forming
- Nuclear physics research studies
- Laser and Thermal Forming Techniques
- Vibration and Dynamic Analysis
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Quantum Chromodynamics and Particle Interactions
- High-Velocity Impact and Material Behavior
- Astronomical and nuclear sciences
- Composite Structure Analysis and Optimization
- Structural Analysis and Optimization
- Particle physics theoretical and experimental studies
- Fatigue and fracture mechanics
- Adhesion, Friction, and Surface Interactions
- Advanced Surface Polishing Techniques
- Dynamics and Control of Mechanical Systems
- Mechanical stress and fatigue analysis
- Gear and Bearing Dynamics Analysis
- Fish Biology and Ecology Studies
- Structural Load-Bearing Analysis
- Material Properties and Applications
- Ichthyology and Marine Biology
- Textile materials and evaluations
- Fish biology, ecology, and behavior
University of Surrey
2019-2025
Saha Institute of Nuclear Physics
2024
University of South Florida
2024
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
2022
Université Claude Bernard Lyon 1
2003-2012
Centre National de la Recherche Scientifique
2004-2012
Institute of Paleoprimatology Human Paleontology Evolution and Paleoenvironments
2004-2012
Institut National des Sciences Appliquées de Lyon
1997-2012
Laboratoire de Mécanique des Contacts et des Structures
2003-2012
Collège de France
2004-2012
Abstract A triangular shell element for the simulation of textile composite reinforcements forming is proposed. This made up unit woven cells. The internal virtual works are added on all cells element. They depend tensions, in‐plane shear and bending moments that directly those given by experimental tests specific to reinforcement. has only displacement degrees freedom; curvatures obtained from neighbouring elements. set example shows efficiency approach relative roles tensile, rigidities....
187Ta (𝑍=73, 𝑁=114) is located in the neutron-rich 𝐴≈190 region where a prolate-to-oblate shape transition via triaxial softness predicted to take place. A preceding work on 𝐾𝜋=(25/2−) isomer and rotational band which decays carried out by same collaboration revealed that axial symmetry slightly violated this nucleus. This paper focuses higher-lying isomer, was previously identified at 2933(14) keV mass measurements with Experimental Storage Ring GSI. The of interest has been populated...
Abstract A semi-analytical thermo-elastic-plastic contact model has been recently developed and presented in a companion paper. The main advantage of this approach over the classical finite element method (FEM) is treatment transient problems with use fine meshing possibility studying effect surface defect on deflection as well subsurface stress state. return-mapping algorithm an elastic predictor/plastic corrector scheme von Mises criterion now used, which improves plasticity loop. This...
The multinucleon transfer (MNT) reaction approach was successfully employed for the first time to measure isomeric ratios (IRs) of 211Po isomer (25/2+) and its ground state (9/2+) at IGISOL facility using a 945 MeV 136Xe beam impinged on 209Bi natPb targets. dominant production isomers compared corresponding states consistently revealed in α-decay spectra. Deduced IR populated through 136Xe+natPb found have an enhancement ≈1.8-times than that observed 136Xe+209Bi. State-of-the-art...
Low-lying states in the isotope Xe130 were populated a Coulomb-excitation experiment performed at CERN's HIE-ISOLDE facility. The magnitudes and relative signs of seven E2 matrix elements one M1 element coupling five low-lying determined using semiclassical coupled-channel least-squares search code gosia. diagonal both 21+ 41+ extracted for first time. reduced transition strengths are line with those obtained from previous measurements. Experimental results compared general Bohr Hamiltonian...
Purpose The aim of this paper is to present an enriched formulation a rotation‐free (RF) triangular shell element in order use it for shells general shapes while, up now, limited without branching surfaces and progressive variations terms material behavior thickness. Design/methodology/approach keeps the main characteristic Morley's element: bending effects can be expressed with three “bending angles” only. But, RF element, these angles are defined rigid body rotations itself those its...
Direct lifetime measurements via $\ensuremath{\gamma}\text{\ensuremath{-}}\ensuremath{\gamma}$ coincidences using a fast timing detector array consisting of ${\mathrm{LaBr}}_{3}(\mathrm{Ce})$ scintillators has been applied to determine the low-lying states in semimagic $(N=50)$ nucleus $^{94}\mathrm{Ru}$. The experiment was carried out as first series ``FAIR-0'' experiments with DESPEC experimental setup at Facility for Antiproton and Ion Research (FAIR). Excited $^{94}\mathrm{Ru}$ were...
In this paper, a shell element for small and large deformations is presented based on the extension of methodology to derive triangular without rotational degrees freedom (so-called rotation-free). As in our original S3 element, curvatures are computed resorting surrounding elements. However, quadrilateral requires internal order avoid singular bending stiffness. The area co-ordinates interpolation used establish required expressions between rigid-body modes normal nodal translations through...
Lifetime measurements of low-lying excited states in the semimagic (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mi>N</a:mi><a:mo>=</a:mo><a:mn>50</a:mn></a:mrow></a:math>) nucleus <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mmultiscripts><b:mi>Rh</b:mi><b:mprescripts/><b:none/><b:mn>95</b:mn></b:mmultiscripts></b:math> have been performed by means fast-timing technique. The experiment was carried out using <c:math...
An inverse identification technique is proposed based on bending-unbending experiments anisotropic sheet-metal strips. The initial anisotropy theory of plasticity extended to include the concept combined isotropic and nonlinear kinematic hardening. This adopted characterize hardening due loading-unloading which occurs in sheet-metals forming processes. To this end, a specific apparatus has been built provide experimental moment-curvature curves. constant bending moment applied over length...
The $\ensuremath{\beta}$ decay of $^{207}\mathrm{Hg}$ into the single-proton-hole nucleus $^{207}\mathrm{Tl}$ has been studied through $\ensuremath{\gamma}$-ray spectroscopy at ISOLDE Decay Station (IDS) with aim identifying states resulting from coupling $\ensuremath{\pi}{s}_{1/2}^{\ensuremath{-}1}$, $\ensuremath{\pi}{d}_{3/2}^{\ensuremath{-}1}$, and $\ensuremath{\pi}{h}_{11/2}^{\ensuremath{-}1}$ shell model orbitals to collective octupole vibration. Twenty-two were observed lying between...
Mass-separated ^{187}Ta_{114} in a high-spin isomeric state has been produced for the first time by multinucleon transfer reactions, employing an argon gas-stopping cell and laser ionization. Internal γ rays revealed T_{1/2}=7.3±0.9 s isomer at 1778±1 keV, which decays through rotational band with perturbations associated approach to prolate-oblate shape transition. Model calculations show less influence from triaxiality compared heavier elements same mass region. The isomer-decay reduced E2...
The $\ensuremath{\beta}$ decay of $^{208}\mathrm{Hg}$ into the one-proton hole, one neutron-particle ${_{81}^{208}\mathrm{Tl}}_{127}$ nucleus was investigated at CERN-ISOLDE. Shell-model calculations describe well level scheme deduced, validating proton-neutron interactions used, with implications for whole $N>126$, $Z<82$ quadrant neutron-rich nuclei. While both negative and positive parity states spin 0 1 are expected within ${Q}_{\ensuremath{\beta}}$ window, only three populated directly...
The first low-energy Coulomb-excitation measurement of the radioactive, semi-magic, two proton-hole nucleus 206Hg, was performed at CERN's recently-commissioned HIE-ISOLDE facility. Two γ rays depopulating low-lying states in 206Hg were observed. From data, a reduced transition strength B(E2;21+→01+)=4.4(6) W.u. determined, such value for an N=126 south 208Pb, which is found to be slightly lower than that predicted by shell-model calculations. In addition, collective octupole state...