Pattern Transitions in a Soft Cylindrical Shell
Yifan Yang, Hui-Hui Dai, Fan Xu, and Michel Potier-Ferry
Phys. Rev. Lett., https://doi.org/10.1103/PhysRevLett.120.215503
research
Bifurcation & Chaos in Nonlinear Structural Dynamics: Novel & Highly Efficient Optimal-Feedback Accelerated Picard Iteration Algorithms
A new class of algorithms for solving nonlinear structural dynamical problems are derived in the present paper, as being based on optimal-feedback-accelerated Picard iteration, wherein the solution vectors for the displacements and velocities at any time in a finitely large time interval are corrected by a weighted (with a matrix) integral of the error. We present 3 approximations to solve the Euler-Lagrange equations for the optimal weighting functions; thus we present 3 algorithms denoted as Optimal-Feedback-Accelerated Picard Iteration (OFAPI) algorithms-1, 2, 3.
Unraveling the molecular mechanisms of thermo-responsive properties of silk-elastin-like proteins by integrating multiscale modeling and experiment
http://dx.doi.org/10.1039/C8TB00819A
Fresh in 2018 Journal of Materials Chemistry B HOT Papers! We present integrative experimental and computational understanding of the thermal response in adaptive hydrogels tailor-made from silk-elastin-like proteins that are tunable and responsive to multiple simultaneous external stimuli.
Release of VEMLab v2.1
VEMLab: a MATLAB library for the virtual element method
Release of VEMLab v2.1
>> From VEMLab v2.0.2 to VEMLab v2.1:
- Add customized wrench domain (for PolyMesher mesh generator only).
- Add customized plate with a hole domain (for PolyMesher mesh generator only).
- Add the following test: “square_plate_with_source2_poisson2d.m” in test folder.
- Add the following test: “plate_with_hole_linelast2d.m” in test folder.
Self‐Sensing Paper Actuators Based on Graphite–Carbon Nanotube Hybrid Films
Published in Advanced Science: https://onlinelibrary.wiley.com/doi/full/10.1002/advs.201800239
No motor, no battery, no problem
New robot concept uses responsive materials to swim through water
When we think of robots, we normally think of motors and batteries and electronics, but engineers at Caltech and ETH Zurich have created a swimming robot that's powered by material deformation. That means it's made using materials that change shape in response to temperature swings, and that deformation pushes the device through water.
Line and Point Defects in Nonlinear Anisotropic Solids
In this paper, we present some analytical solutions for the stress fields of nonlinear anisotropic solids with distributed line and point defects.
£1 million awarded for 5 year project for virtual testing of components
Simpleware software user Dr. Llion Evans of Swansea University and the Culham Centre for Fusion Energy has received £1 million in funding for a five-year project into virtual testing of new components. Funded by the Engineering and Physical Sciences Research Council (EPSRC), the research looks at how image-based simulation using 3D X-ray imaging can virtually evaluate manufactured components.
Learn more about this project
Wiki surface - an open access encyclopedia of surfaces
Dear Mechanicians,
a new project at the IMT School for Advanced Studies Lucca (Lucca, Italy) has just been launched to create the first open access database of rough surfaces from nature and technology, see:
http://musam.imtlucca.it/wikisurf.html
People are invited to contribute to the database by providing images of surfaces acquired using experimental techniques, as well as the corresponding elevation data field (raw x,y,z data in columns).
Aging-dependent strain localization in amorphous glassy polymers: from necking to shear banding
This study investigates the influence of physical aging on the deformation behaviors of poly(ethylene terephthalate)-glycol. The polymers are subjected to a quenched and an annealed heat treatment, followed by deformation in tension. The digital image correlation (DIC) is used to capture the surface strain. The DIC results show that the deformation localization occurs in the post-yield strain softening region. The quenched and annealed polymers exhibit different localization types, representing as necking for quenched polymers and shear banding for annealed polymers.