Results 61 to 70 of about 9,892 (253)

Noninvasive Measurement of Scleral Stiffness and Tangent Modulus in Porcine Eyes

Investigative Opthalmology & Visual Science, 2014
We investigated an indentation technique to measure the scleral stiffness and tangent modulus of porcine eyes.The scleral load-displacement responses were measured with a universal testing machine as a function of IOP in 15 porcine eyes ex vivo using a 5-mm diameter cylindrical flat-punch indenter.
Leung, Ka Kit, Ko, Wai Lun, Ye, Cong, Lam, David Chuen Chun, Leung, Christopher Kai Shun   +4 more
openaire   +3 more sources

Strain‐Activated Mechanical Metamaterial With Programmable Dual‐Phase Stiffness and Enhanced Energy Absorption

Advanced Materials Technologies, EarlyView.
A strain‐activated mechanical metamaterial is developed to achieve programmable dual‐phase stiffness through an intrinsic geometric locking mechanism. Finite element modeling and parametric analysis identify the key design parameters governing activation strain, stiffness transition, and energy absorption.
Ramin Yousefi‐Nooraie, Romain Lemoine, Mario Guagliano, Sara Bagherifard   +3 more
wiley   +1 more source

Continuum Mechanics Modeling of Flexible Spring Joints in Surgical Robots

Advanced Robotics Research, EarlyView.
A new mechanical model of a tendon‐actuated helical extension spring joint in surgical robots is built using Cosserat rod theory. The model can implicitly handle the unknown contacts between adjacent coils and numerically predict spring shapes from straight to significantly bent under actuation forces.
Botian Sun, Liang Zhang, Jianwen Zeng, Xuefeng Wang   +3 more
wiley   +1 more source

Application of tangent modulus method in nonlinear settlement calculation of foundation

IOP Conference Series: Earth and Environmental Science, 2020
Abstract Foundation settlement calculation has been a difficult and hot problem in geotechnical engineering study. The problems lies in the large differences between the geotechnical parameters of field and indoor test. The using of the tangent modulus method based on the field loading test to determine the calculation parameters can ...
Yu-cheng Zhang, Hai-ying Hu, Cai-yuan Chen   +2 more
openaire   +1 more source

A Self‐Healing Permanent Magnet Putty for Soft Robot Skins With Force Sensing and Functional Recovery

Advanced Robotics Research, EarlyView.
Permanent magnet putty (PMP) integrates high‐coercivity NdFeB particles with a dynamic polyborosiloxane–Ecoflex matrix, achieving rapid self‐healing (90% mechanical recovery in 10 s) and magnetic recovery within 20 min. With twice the sensitivity of commercial putties, PMP enables precise 5–30 N force detection and discrimination between pressing and ...
Ruotong Zhao, Mitsuhiro Kamezaki, Ryosuke Dobashi, Yuhiro Iwamoto, Yasushi Ido, Yoshihiro Kawahara   +5 more
wiley   +1 more source

3D Printing of Self‐Healing Polymers by Material Extrusion: A Process‐Centric Review of Setups, Parameters, and Applications

Advanced Robotics Research, EarlyView.
This review highlights recent advances in material extrusion 3D printing of self‐healing polymers, focusing on the interplay between material chemistry, rheology, hardware customization, and process optimization. Filament‐ and ink‐based extrusion strategies, multimaterial architectures, and postprocessing approaches are discussed for applications in ...
Antonio Pavone, Gianni Stano, Gianluca Percoco   +2 more
wiley   +1 more source

Experimental investigation of the effect of test speed on rupture performance of synthetic yarns

Acta Polytechnica
This study experimentally investigated the effect of testing speed on the mechanical behaviour of five types of synthetic fibres – aramid, high-modulus polyethylene (HMPE), liquid crystal polymer (LCP), polyamide, and polyester – through yarn break load
Daniel Magalhães da Cruz, Ignacio Melito, Tales Luiz Popiolek Júnior, Marcelo de Ávila Barreto, Fernanda Mazuco Clain, Carlos Eduardo Marcos Guilherme   +5 more
doaj   +1 more source

New design equations for elastic modulus of concrete using multi expression programming

Journal of Civil Engineering and Management, 2015
An innovative multi expression programming (MEP) approach is used to derive new predictive equations for tangent elastic modulus of normal strength concrete (NSC) and high strength concrete (HSC).
Amir H. Gandomi, Ali Faramarzifar, Peyman Ghanad Rezaee, Abazar Asghari, Siamak Talatahari   +4 more
doaj   +1 more source

Helix Alignment, Chevrons, and Edge Dislocations in Twist‐Bend Ferroelectric Nematics

Advanced Science, EarlyView.
The recently discovered twist‐bend ferroelectric nematic (NTBF) is the new member of the multiferroic family, representing a fluid with an oblique helicoidal (heliconical) periodic structure of spontaneous electric polarization. The work presents a thorough exploration of the material properties of this phase, how the periodic modulation of ...
Bijaya Basnet, Priyanka Kumari, Sathyanarayana Paladugu, Damian Pociecha, Jakub Karcz, Przemysław Kula, Nataša Vaupotič, Ewa Górecka, Oleg D Lavrentovich   +8 more
wiley   +1 more source

Effect of Change in Material Properties of the Abradable Coating on the Wear Behavior of It—Microstructure Model-Based Analysis Approach

Lubricants
In aerospace applications, engine parts, especially those around the rotor blade tips, are coated with an abradable seal, a specific material layer. Its design produces a tighter seal without harming the blades by allowing it to wear down or “abrade ...
Anitha Kumari Azmeera, Prakash Jadhav, Chhaya Lande   +2 more
doaj   +1 more source