Results 31 to 40 of about 728 (177)

Nonlinear finite-element analysis of embedment behavior of metal washer in bolted timber joints

Journal of Wood Science, 2021
The pretensioning force in bolted joints enhances the lateral strength of the connections, and causes the embedment of metal washers into wood. Despite the significance of embedment behavior in the design of bolted joints, its mechanism has yet to be ...
Masaki Teranishi, Doppo Matsubara, Yoshiaki Wakashima, Hidemaru Shimizu, Akihisa Kitamori   +4 more
doaj   +1 more source

A theoretical and experimental study on the pre-tensioning and anchorage of composite materials based on shape memory alloys

Case Studies in Construction Materials, 2023
Prestressing technology can not only improve the bearing capacity of beam but also improve the utilization rate of carbon fiber-reinforced polymers (CFRPs). However, the existing prestressing and anchorage devices are complicated and have many components,
Zihan Li, Qilin Zhao, Yingsong Wu, Yonglong Zhu, Haojing Wang   +4 more
doaj   +1 more source

Modelling of Multi-Bolted Systems at the Pretension Stage – Part 1: Mechanical Characteristics of the Contact between the Joined Elements [PDF]

Archives of Metallurgy and Materials
The subject of the paper is the modelling of multi-bolted connections that are at the pretensioning stage. Taking a systematic approach to the modelling issue, the connection was treated as a composite of four subsystems: a bolt set, a pair of joined ...
R. Grzejda, K. Kwiatkowski
doaj   +1 more source

Numerical analysis of cable net structure with application of different pretensioning methods [PDF]

, 2019
Tension roofs based on cable systems are suitable for covering long span buildings. Such structures are considered to be economic, modern and aesthetic solutions in various multi-functional arenas.
Budziński, Rafał
core   +1 more source

DataSheet1_Effects of Automated Emergency Braking and Seatbelt Pre-Pretensioning on Occupant Injury Risks in High-Severity Frontal Crashes.docx

, 2022
In high-severity crashes, occupant protection is challenging. Automated Emergency Braking (AEB) and seatbelt pre-pretensioning (PPT) are means to improve occupant protection; the purpose of this study was to quantify their effects on occupant injury ...
Bengt Pipkorn (643061), Krystoffer Mroz (6082505), Nils Lubbe (747444), Ekant Mishra (12959891)   +3 more
core   +1 more source

Feasibility of up-tower repair concepts for pultruded carbon spar cap planks in wind turbine blades [PDF]

Wind Energy Science
While modern wind turbine blades utilize pultruded carbon-fiber-reinforced polymer (CFRP) planks for structural integrity in spar caps, these materials can sustain damage from operational stresses, leading to potential failures if unaddressed ...
M. Rosemeier, M. Saathoff, J. Kolsch, P. Buriticá, E. Petersen, C. Beer   +5 more
doaj   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Full-Process Analysis of Pretensioning Construction of Dalian Gym

, 2010
As a inclined mega-grid suspend-dome, the prestressing constructi of Dalian gym is very complex. Full-process analysis for the pretensioning scheme should be done before construction.
Hong Liang Qian, En Chun Zhu, Hua Jie Wang, Xu Dong Zhi, Feng Fan   +4 more
core   +1 more source

Effect of pre-tensioning force on behavior of Buckling Restrained Brace (BRB) supported by double pre-tensioning system

Fracture and Structural Integrity
The study explores the feasibility of a new all-steel buckling restrained brace (BRB) with the double pre-tensioning system as an alternative to conventional concentrically braced frames by using finite element method (ABAQUS program), And to verify ...
Mohamed Selim, Muhammad E. Kamel, Eman Elshamy, Mohamed Emara   +3 more
doaj   +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