Results 51 to 60 of about 2,182,834 (296)

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

Fatigue Crack Initiation and Growth in Nanocrystalline Ni at Multiple Length‐Scales

Advanced Engineering Materials, EarlyView.
Overview of miniaturized in situ SEM fatigue setup and resultant fatigue crack growth data for nanocrystalline Ni. The presented study focuses on the analysis of fatigue crack growth rate (FCGR) in focused ion beam‐notched microcantilevers prepared from nanocrystalline (NC) Ni as a model material.
Igor Moravcik, Alexander Jelinek, Markus Alfreider, Jutta Luksch, Anton Hohenwarter, Florian Schaefer, Christian Motz, Daniel Kiener   +7 more
wiley   +1 more source

An Amplitude-Phase Representation of the North-East-Down Kinematic Differential Equations

IEEE Access, 2023
The overall goal of the paper is to derive a kinematic model for vehicle path-following systems, where the pitch and yaw angles $(\theta, \psi)$ together with the surge velocity $u$ can be treated as control inputs. Then the outer control loop can be
Thor I. Fossen
doaj   +1 more source

Fluctuating semiflexible polymer ribbon constrained to a ring [PDF]

, 2007
Twist stiffness and an asymmetric bending stiffness of a polymer or a polymer bundle is captured by the elastic ribbon model. We investigate the effects a ring geometry induces to a thermally fluctuating ribbon, finding bend-bend coupling in addition to ...
Adams, Alim, Bartles, Bauer, Benham, Claessens, Cloutier, E. Frey, Elbaum, Everaers, Fuller, Golestanian, Hearst, Heussinger, K. Alim, Klenin, Kratky, Lin, Liverpool, Mergell, Panyukov, Saitô, Shimada, Tilney, White   +24 more
core   +2 more sources

Meta‐Rod Mechanical Metamaterials With Programmable Reconfiguration

Advanced Functional Materials, EarlyView.
Existing mechanical metamaterials achieve programmable large deformations in planar square or cubic configurations, restricted by required complex boundary conditions. This research proposes a 1D metamaterial, Meta‐rod, with linear, bending, twisting, area, and volume deformation modes.
Atharva Pande, Lyes Kadem, Hang Xu
wiley   +1 more source

An applied engineering approach to attitude and orbit representations for low-earth-orbiting rigid spacecraft: a comprehensive review

Franklin Open
This article provides a thorough review of common spacecraft orbit, and attitude representations utilized for low-earth-orbiting rigid spacecraft. In addition, it presents various forms of spacecraft dynamics. Each representation and dynamic form has its
Tamer Mekky Ahmed Habib
doaj   +1 more source

Robot sensor failure detection system based on convolutional neural networks for calculation of Euler angles [PDF]

Bulletin of the Polish Academy of Sciences: Technical Sciences, 2020
In this work, we present a failure detection system in sensors of any robot. It is based on the k-fold cross-validation approach and built from N neural networks, where N is the number of signals read from sensors.
A. Świetlicka, K. Kolanowski
doaj   +1 more source

Rational Tuning of Hygroscopic Oscillation of Stacked Nanoflake Assemblies for Continuous Ambient Energy Harvesting

Advanced Materials, EarlyView.
Stacked nanoflake assembly (SNA) membranes can oscillate autonomously, offering opportunities for soft actuation and energy harvesting. This work uncovers the physical mechanism behind the sustained oscillation of SNA membranes in gradient humidity and identifies three governing dimensionless parameters, enabling rational design for optimizing SNA ...
Zijing Zhang, Jimin Fu, Gesa Zhang, Zhihua Liang, Boxun Zhang, Haimin Yao   +5 more
wiley   +1 more source

A method for measuring the micro-texture information based on transmission electron microscopy

Journal of Materials Research and Technology, 2020
Conventional SEM-based micro-texture technique has attracted broad interests in recent years. There is also an important need to develop TEM based micro-texture methods, since it was expected to back up some of the shortages of conventional micro-texture
Zhen Zhang, Ji-an Huang, Peng Guo, Jin-hua Peng, Shan Wang, Chang Chen   +5 more
doaj   +1 more source

Adjusting unit cell three-dimensional posture and mirror array: A novel lattice structure design approach

Materials & Design, 2022
Lattice structures’ performance is directly determined by the topological structure and arrangement of cells. Here, we propose a lattice structure design approach that generates predictable mechanical properties by adjusting the three-dimensional posture
Xiaohong Chen, Wenxin Ren, Yuanxi Sun, Junfang Zhang, Jianxing Yang, Ke Wang, Yu Gong, Zhiqing Zhang, Long Bai   +8 more
doaj   +1 more source