The Bending Deformation Analysis of a Beam Longitudinal Fiber in Mechanics of Materials

2020 ◽  
Vol 09 (04) ◽  
pp. 145-149
Author(s):  
奇志 王
Keyword(s):  
Deformation Analysis ◽  
Bending Deformation ◽  
Mechanics Of Materials ◽  
Longitudinal Fiber

Fabrication, modeling, and characterization of soft twisting electrothermal actuators with directly printed oblique heater

2022 ◽  
Author(s):  
Yang Cao ◽  
Jingyan Dong
Keyword(s):  
Kinematic Model ◽  
Design Parameters ◽  
Deformation Analysis ◽  
Pdms Layer ◽  
Element Analysis ◽  
Electrothermal Actuators ◽  
Bending Deformation ◽  
Heating Capacity ◽  
Twisting Angle ◽  
Twisting Deformation

Abstract Soft electrothermal actuators have drawn extensive attention in recent years for their promising applications in biomimetic and biomedical areas. Most soft electrothermal actuators reported so far demonstrated uniform bending deformation, due to the deposition based fabrication of the conductive heater layer from nanomaterial-based solutions, which generally provides uniform heating capacity and uniform bending deformation. In this paper, a soft electrothermal actuator that can provide twisting deformation was designed and fabricated. A metallic microfilament heater of the soft twisting actuator was directly printed using electrohydrodynamic (EHD) printing, and embedded between two structural layers, a polyimide (PI) film and a polydimethylsiloxane (PDMS) layer, with distinct thermal expansion properties. Assisted by the direct patterning capabilities of EHD printing, a skewed heater pattern was designed and printed. This skewed heater pattern not only produces a skewed parallelogram-shaped temperature field, but also changes the stiffness anisotropy of the actuator, leading to twisting deformation with coupled bending. A theoretical kinematic model was built for the twisting actuator to describe its twisting deformation under different actuation effects. Based on that model, influence of design parameters on the twisting angle and motion trajectory of the twisting actuator were studied and validated by experiments. Finite element analysis (FEA) was utilized for the thermal and deformation analysis of the actuator. The fabricated twisting actuator was characterized on its heating and twisting performance at different supply voltages. Using three twisting actuators, a soft gripper was designed and fabricated to implement pick-and-place operations of delicate objects.

106 Bending Deformation Analysis of A Coaxial Cable

2013 ◽  
Vol 2013 (0) ◽  
pp. 41-42
Author(s):  
Masataka Ogai ◽  
Hidefumi Wakamatsu ◽  
Eiji Morinaga ◽  
Eiji Arai ◽  
Shigeki Shimada ◽  
...  
Keyword(s):  
Coaxial Cable ◽  
Deformation Analysis ◽  
Bending Deformation

Nonlinear Analysis of Actuation Performance of NiTi/Si Composite Film

2013 ◽  
Vol 437 ◽  
pp. 572-576 ◽  
Author(s):  
Shuang Shuang Sun ◽  
Xian Ce Jiang
Keyword(s):  
Shape Memory Alloy ◽  
Composite Film ◽  
Geometric Nonlinearity ◽  
Thermal Cycle ◽  
Niti Shape Memory Alloy ◽  
Maximum Deflection ◽  
Si Substrate ◽  
Equilibrium Equations ◽  
Bending Deformation ◽  
Mechanics Of Materials

The NiTi shape memory alloy (SMA) composite film with Si substrate subjected to thermal loads was modeled by the method of mechanics of materials. The governing equation was obtained by combining static equilibrium equations, geometric and physical equations. Both the material nonlinearity of SMA and the geometric nonlinearity of bending deformation of SMA composite film were considered. By simulating the actuation performance of the SMA composite film during a cooling-heating thermal cycle, it is found that the final cooling temperature and the thickness of SMA film have significant effects on the actuation performance of the SMA composite film. Besides, the maximum deflection of the SMA composite film is affected obviously by the geometric nonlinearity of bending deformation when the thickness of SMA film is very large.

scholarly journals Bending deformation analysis of gear hone tooth lateral faces

2018 ◽  
Vol 224 ◽  
pp. 01063
Author(s):  
Yuriy Bagaiskov
Keyword(s):  
Elasticity Modulus ◽  
Gear Tooth ◽  
Contact Point ◽  
Tool Material ◽  
Deformation Analysis ◽  
Vertical Position ◽  
Tooth Root ◽  
Bending Deformation ◽  
Generating Method ◽  
Order Of Magnitude

Gear hones are used for finish machining of hardened gear tooth lateral faces by the generating method. In service, due to penetration of abrasive grains into metal, wear and running-in of the tool material, especially in the case of elastic binding agents, the tooth contact takes place not in a point, but in an ellipse area. The total bending deformation of a hone tooth in the contact point is a sum of the fixed tooth bending deformation and the deformation, characterizing the tooth root travel in a hone rim. The calculations make it evident that hone tooth bending deformation value depends on the contact point vertical position; it drops by a factor of 400 – 500 from the lower contact point to the top. Besides, deformation increases by a factor of 60 with decrease of the elasticity modulus. The rim part adjacent to a tooth is also considered during analysis of the second component of the total tooth bending deformation, characterizing the tooth root elastic strain. With the tooth height increase, this deformation value increases by a factor of 4 – 20 and significantly (by an order of magnitude) increases with the elasticity modulus drop. Bending deformation analysis results of gear hone teeth are applied for studying their operation capabilities, as well as development of geometry and compound specifications.

scholarly journals Finite Element Modeling and Stress Analysis of a Six-Splitting Mid-Phase Jumper

2020 ◽  
Vol 10 (2) ◽  
pp. 644 ◽  
Author(s):  
Ma ◽  
Li ◽  
Han ◽  
He ◽  
Xiao
Keyword(s):  
Finite Element ◽  
Mechanical Response ◽  
Complex Geometry ◽  
Element Model ◽  
Wind Load ◽  
Modeling Method ◽  
Local Model ◽  
Deformation Analysis ◽  
Actual Structure ◽  
Bending Deformation

In this study, a finite element, fully three-dimensional solid modeling method was used to study the mechanical response of a steel-cored aluminum strand (ACSR) with a mid-phase jumper under wind load. A whole model (simplifying an ACSR into a solid cylinder) and a local model (modeling according to the actual structure of an ACSR) of the mid-phase jumper were established. First, the movement of the mid-phase jumper of the tension tower under wind load was studied based on the whole finite element model, and the equivalent Young’s modulus of the whole model was adjusted based on the local model. The results of the whole model were then imported into the local model and the stress distribution of each strand of the ACSR was analyzed in detail to provide guidance for the treatment measures. Therefore, the whole model and the local model complemented each other, which could reduce the number of model operations and ensure the accuracy of the results. Through the follow-up test to verify the results of the finite element simulation and the comparison of the simulation and fatigue test results, the causes of the broken strand of the ACSR were discussed. Although this modeling method was applied to the stress and deformation analysis of a mid-phase jumper in this study, it can be used to study the bending deformation of rope structures with a complex geometry and the main bending deformation. In addition, the effect of the friction coefficient on the bending of the mid-phase jumper was studied.

Longitudinal bending deformation analysis of sheet metal in continuous roll forming process

2015 ◽  
Vol 80 (1-4) ◽  
pp. 467-476 ◽  
Author(s):  
Mi Wang ◽  
Zhong-Yi Cai ◽  
Lin-Lin Li ◽  
Ming-Zhe Li
Keyword(s):  
Sheet Metal ◽  
Roll Forming ◽  
Deformation Analysis ◽  
Forming Process ◽  
Bending Deformation ◽  
Longitudinal Bending ◽  
Roll Forming Process

Dynamic Heart Valve Cusp Bending Deformation Analysis

2013 ◽  
pp. 247-252
Author(s):  
Sven Friedl ◽  
Stefan König ◽  
Michael Weyand ◽  
Thomas Wittenberg ◽  
Markus Kondruweit
Keyword(s):  
Heart Valve ◽  
Deformation Analysis ◽  
Bending Deformation
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