Results 71 to 80 of about 16,786 (249)

Tri‐WOB: A Bistability‐Driven Variable Stiffness Origami Structure for Soft Robotic Arms

Advanced Science, EarlyView.
Inherent bistability in Waterbomb origami enables the Tri‐WOB to switch between compliant and stiff states. By stacking multiple modules, the robotic arm maintains stiffness without continuous energy input while achieving large contraction, free morphing, and load‐bearing/transportation capability.
Lingchen Kong, Yaoyao Fiona Zhao
wiley   +1 more source

Un abaque à Delphes

Bulletin de correspondance hellénique, 2009
Ένας άβακας στους Δελφούς Πάνω σε ένα λίθο, γνωστό εδώ και πολύ καιρό λόγω μιας επιγραφής (FD III, 4, 189) και τοποθετημένο στο νότιο άνδηρο, στη ΝΑ γωνία του ναού του Απόλλωνα, βλέπουμε δύο σειρές γραμμών και δύο ημικύκλια που εφάπτονται σε δύο από τις γραμμές και τα οποία, από όσο γνωρίζουμε, δεν είχαν επισημανθεί μέχρι σήμερα.
openaire   +2 more sources

Dimple‐Encoded Reprogrammable Origami

Advanced Science, EarlyView.
Local snap‐through of bistable dimples turns flat elastic sheets into reprogrammable origami structures. Interaction‐guided dimple arrays act as angle‐programmable hinge bands, enabling one sheet to morph into distinct polygonal and three‐dimensional configurations while retaining stable shapes for deployable and protective functions.
Qun Zhang, Weicheng Huang, Amir Hajiyavand, Hyunyoung Kim, Claire Dancer, Karl Dearn, Mingchao Liu   +6 more
wiley   +1 more source

Effects of HfC Particles on Crack Initiation and Propagation Behavior of WC/Co Composites

Xibei Gongye Daxue Xuebao, 2019
Tungsten carbide composites were prepared by cold-pressing and hot-pressing sintering; fracture toughness and bending strength of the specimens were tested. The microstructures of HfC/WC/Co composites were observed with the SEM.

doaj   +1 more source

Towards Real‐Time Monitoring of Soft Robotic Systems in Endoscopic Application With Ultra‐Flexible Organic Transistor‐Based Strain Sensors

Advanced Electronic Materials, EarlyView.
The integration of ultra‐flexible, all‐organic, field‐effect transistor‐based strain sensors to soft structures is reported for the development of sensorized soft robots. The envisaged application is the development of next‐generation, controllable, and observable soft robotic catheters for endoscopic applications, such as drug delivery. Mechanical and
Usama Mahmood, Andrea Bartolucci, Giulia Casula, Antonello Mascia, Lorenzo Vannozzi, Stefano Lai   +5 more
wiley   +1 more source

Free Vibration Analysis for Polyester/Graphene Nanocomposites Multilayer Functionally Graded Plates

Фізика і хімія твердого тіла
In the current work, an FGM nanocomposite made of multi-layers of graphene nanoparticles and a polyester-based matrix was constructed using the molds with a hand lay-up technique to attain an accurate shape and reduce defects in the final product.
Shahad Qusi Abd Alqader, Bashar Owaid Bedaiwi, Emad Kadum Njim, Ayad M. Takhakh, Lazreg Hadji   +4 more
doaj   +1 more source

Design Optimization of Soft Fabric Pneumatic Actuators

Advanced Intelligent Systems, EarlyView.
This study presents a systematic optimization framework for elongating and bending fabric‐based soft pneumatic actuators. After a preliminary design‐space reduction, the framework minimizes energy consumption under mechanical performance constraints by integrating validated finite element modeling with statistical surrogate models. Optimal designs were
Grigorios M. Chatziathanasiou, Konstantina Tsintzira, Panagiotis Polygerinos   +2 more
wiley   +1 more source

Structural and thermal analysis of butt joint GTAW of similar and dissimilar materials with distinct groove angles through simulation and mathematical modelling [PDF]

FME Transactions, 2020
The present article discusses the simulation and mathematical modelling of GTAW for various parameters of single and double V-groove butt joint welds.
Kiran Bandaru, Mishra Kaushik, Singh Raj Yash, Nagaraju Dega   +3 more
doaj  

Cooling Holes in Polymer Spur Gears: A Critical Analysis of Heat Dissipation Benefits and Mesh Stiffness Penalties

Journal of Applied Polymer Science, EarlyView.
Cooling holes provide a simple passive cooling strategy for polymer spur gears, reducing maximum operating temperature by up to 9.39% while introducing a measurable gear mesh stiffness penalty. A validated response‐surface model reveals how hole size and location govern this thermal–mechanical trade‐off, enabling design optimization for thermally and ...
Abderrahim Baccar, Ahmed Samet, Ahmed Hammami, Nuno Dourado, Ali Akrout, Mohamed Haddar   +5 more
wiley   +1 more source

Lagomorph cranial biomechanics and the functional significance of the unique fenestrated rostrum of leporids

The Anatomical Record, EarlyView.
Abstract The crania of leporid lagomorphs are uniquely fenestrated, including the posterior cranial bones and the lateral portion of the maxilla. The functional significance of the highly fenestrated rostrum has received considerably little attention, despite being absent in other mammalian herbivores with a long rostrum.
Amber P. Wood‐Bailey, Alana C. Sharp
wiley   +1 more source