Results 11 to 20 of about 146,646 (262)

Dynamic Response and Energy Absorption Characteristics of Expansion Tubes Under Axial Impact

open access: yesIEEE Access, 2020
The expansion tube is normally used in impact-resistant components, owing to the stable expansion force, and high specific energy-absorption capacity. This paper reports the deformation mechanism and energy absorption characteristics of expansion tube ...
Zizhen Qi   +4 more
doaj   +1 more source

COPI vesicle transport is a common requirement for tube expansion in Drosophila. [PDF]

open access: yesPLoS ONE, 2008
BACKGROUND: Tube expansion defects like stenoses and atresias cause devastating human diseases. Luminal expansion during organogenesis begins to be elucidated in several systems but we still lack a mechanistic view of the process in many organs.
Satish Arcot Jayaram   +5 more
doaj   +1 more source

Effect of Tube Expansion on Heat Transfer and Pressure Drop Characteristics During Condensation in Micro-Fin Tubes

open access: yesFrontiers in Energy Research, 2021
Despite of the large number of research dedicated to condensation heat transfer and pressure drop characteristics in pristine micro-fin tubes, experimental investigation on effects of tube expansion have not been reported in the open literature.
Na Liu, Qian Zhao, Zhixiang Lan
doaj   +1 more source

Electromagnetic Force Distribution and Forming Performance in Electromagnetic Tube Expansion with Axial Compression

open access: yesIEEE Access, 2020
Electromagnetic tube expansion has been given much attention due to its superior cold forming properties. The traditional electromagnetic coil is of single structure, which results in substantial tube wall thinning and mechanical strength reduction. This
Li Qiu   +7 more
doaj   +1 more source

Microstructure analysis and crack nucleation in TWIP steel tube at expansive deformation

open access: yesMaterials Research Express, 2021
The expansion test of twinning induced plastic (TWIP) steel tube was carried out at room temperature. Cracks appeared inside the tube edge when TWIP steel tube expands by 15.6%.
ChunYuan Liu   +6 more
doaj   +1 more source

The proteolysis of ZP proteins is essential to control cell membrane structure and integrity of developing tracheal tubes in Drosophila

open access: yeseLife, 2023
Membrane expansion integrates multiple forces to mediate precise tube growth and network formation. Defects lead to deformations, as found in diseases such as polycystic kidney diseases, aortic aneurysms, stenosis, and tortuosity.
Leonard Drees   +4 more
doaj   +1 more source

Evaluation and Prediction of Antifriction Effect Between Cold Expansion Cone and Inner Wall of Tube

open access: yesShiyou jixie, 2022
It is difficult to evaluate the friction between the expansion cone and the inner wall of the tube in the expansion process.To solve this problem,a new cost-effective evaluation method was proposed.In this method,the expansion process of the expansion ...
Han Meng   +4 more
doaj  

Effect of structural parameters and materials choice on the mechanical characteristics of expansion tubes

open access: yesAIP Advances, 2020
An expansion tube is an ideal energy absorber which dissipates kinetic energy through plastic deformation and friction. There is an urgent need to understand the influence of key parameters such as the semi-angle, tube material, and friction coefficient ...
Zizhen Qi, Yuwu Zhang, Yuliang Lin
doaj   +1 more source

Tube Expansion by Single Point Incremental Forming: An Experimental and Numerical Investigation

open access: yesMetals, 2021
In this paper, we revisit the formability of tube expansion by single point incremental forming to account for the material strain hardening and the non-proportional loading paths that were not taken into consideration in a previously published ...
Carlos Suntaxi   +4 more
doaj   +1 more source

Expansion of oval tubes: prediction and experiment [PDF]

open access: yesESAFORM 2021, 2021
The manufacturing of oval tubes for automotive components from sheets consists of several steps, from the flat sheet to a tube with expanded ends. It involves roll-bending of tubes, welding and several expansion processes with segmented tools. Forming steps in this process are subject to springback after the release of tools. Finite-element-simulations
Markus Stennei   +6 more
openaire   +1 more source

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