Cross-Section Design of the Crash Box to Maximize Energy Absorption

2011 ◽  
Author(s):  
Hwan Hak Jang ◽  
Hyun-Ah Lee ◽  
Sang-Il Yi ◽  
Dae Seung Kim ◽  
Heui Won Yang ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Cross Section ◽  
Section Design

Parameter Characterization for Elastic Energy Absorption of an Embedded Corrugated Wave Padding Concept

2016 ◽  
Author(s):  
Sean S. Tolman ◽  
Amanda Beatty ◽  
Anton E. Bowden ◽  
Larry L. Howell
Keyword(s):  
Energy Absorption ◽  
Cross Section ◽  
Peak Pressure ◽  
Force Distribution ◽  
Finite Element Analyses ◽  
Performance Metric ◽  
Physical Testing ◽  
Physical Tests ◽  
Factorial Design Of Experiments ◽  
Full Factorial

The parameters of an innovative padding concept were investigated using Finite Element Analyses (FEA) and physical testing. The concept relies on a compliant corrugation embedded in an elastic foam to provide stiffness for force distribution and elastic deformation for energy absorption. The shape of the corrugation cross section was explored as well as the wavelength and amplitude by employing a full factorial design of experiments. FEA results were used to choose designs for prototyping and physical testing. The results of the physical tests were consistent with the FEA predictions although the FEA tended to underestimate the peak pressure compared to the physical tests. A performance metric is proposed to compare different padding configurations. The concept shows promise for sports padding applications. It may allow for designs which are smaller, more lightweight, and move better with an athlete than current technologies yet still provide the necessary protective functions.

Numerical Investigation of Cross-Section on Aluminum A6063 Thin-Walled Structures under Low-Velocity Impact Loading

2014 ◽  
Vol 1019 ◽  
pp. 96-102
Author(s):  
Ali Taherkhani ◽  
Ali Alavi Nia
Keyword(s):  
Energy Absorption ◽  
Cross Section ◽  
Cross Sections ◽  
Peak Load ◽  
Circular Cross Section ◽  
Absorption Capacity ◽  
Energy Absorption Capacity ◽  
Thin Walled Structures ◽  
Thin Walled ◽  
Crush Strength

In this study, the energy absorption capacity and crush strength of cylindrical thin-walled structures is investigated using nonlinear Finite Elements code LS-DYNA. For the thin-walled structure, Aluminum A6063 is used and its behaviour is modeled using power-law equation. In order to better investigate the performance of tubes, the simulation was also carried out on structures with other types of cross-sections such as triangle, square, rectangle, and hexagonal, and their results, namely, energy absorption, crush strength, peak load, and the displacement at the end of tubes was compared to each other. It was seen that the circular cross-section has the highest energy absorption capacity and crush strength, while they are the lowest for the triangular cross-section. It was concluded that increasing the number of sides increases the energy absorption capacity and the crush strength. On the other hand, by comparing the results between the square and rectangular cross-sections, it can be found out that eliminating the symmetry of the cross-section decreases the energy absorption capacity and the crush strength. The crush behaviour of the structure was also studied by changing the mass and the velocity of the striker, simultaneously while its total kinetic energy is kept constant. It was seen that the energy absorption of the structure is more sensitive to the striker velocity than its mass.

scholarly journals Presepsin Level Correlates with the Development of Moderate Coronary Artery Calcifications in Hemodialysis Patients: A Preliminary Cross-Section Design Study

2020 ◽  
Vol Volume 13 ◽  
pp. 999-1006
Author(s):  
Ahmed F Elhabashi ◽  
Leena Sulaibeekh ◽  
Nahed Seddiq ◽  
Salman Alali ◽  
Amjad K Abdulmajeed ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Cross Section ◽  
Hemodialysis Patients ◽  
Design Study ◽  
Section Design

scholarly journals Rights Of Disabilities To Education, Occupation, Health, Social Welfare, And Accessibility

2020 ◽  
Vol 5 (1) ◽  
pp. 48-54
Author(s):  
YOPI HARWINANDA ARDESA
Keyword(s):  
Social Welfare ◽  
Cross Section ◽  
People With Disabilities ◽  
Right To Health ◽  
Right To Education ◽  
Section Design ◽  
The Subject

Background: People with disabilities are those with physical or mental limitations in long term. People with disabilities have some rights they deserve such as rights to education, occupation, health, social welfare, and accessibility. Method and Subject: This research was conducted on December 2019, in Colomadu Sub District using questionnaire with cross-section design. The subject used consisted of 23 quadriplegic persons. Result: Out of 23 quadriplegic persons, the result of analysis showed significant score of 0.236 between people with disabilities and right to education, of 0.167 between people with disabilities and right to occupation, of 0.313 between people with disabilities and right to health, of 0.150 between people with disabilities and right to social welfare, and of 0.762 between people with disabilities and right to accessibility, with p > 0.05.  Conclusion: The rights of people with disabilities (disability people) have not been fulfilled yet in Colomadu Sub District.

scholarly journals A theater production to promote a smoke-free life to secondary students

2019 ◽  
Vol 20 ◽  
Author(s):  
Alice Yuen Loke ◽  
Yim-wah Mak ◽  
Cynthia ST Wu ◽  
Yuen-ting Wong
Keyword(s):  
Health Education ◽  
Secondary Students ◽  
Cross Section ◽  
School Health ◽  
School Based ◽  
Theater Production ◽  
Smoking Behaviors ◽  
Education Workshop ◽  
Section Design ◽  
To Come

Abstract Background: Peer-led school-based anti-smoking programs have been shown to affect the smoking behaviors of students. The aim of this study was to examine the effectiveness of a school-based peer-led live theater production advocating a smoke-free life. Methods: This is a cross-section design study. Students from the drama club were recruited as School Health Ambassadors (SHAs). The SHAs were to involve in a theater production in advocating a smoke-free life, and were provided a health education workshop from the project team on facts relating to smoking and smoke-free life. All the students in the school were to watch the theater production as school peer audience members (SPAs). Comparison will be made between the two groups of students in their attitude and decision towards living a smoke-free life after being involved in the theater production or in watching the drama. Results: A total of 409 students, 21 SHAs, and 388 SPAs were included in the project. Both the SHAs and the SPAs reported confidently about their ability to resist offers or temptation to smoke, and were determined to live a smoke-free life and refrain from smoking the first cigarette. Conclusions: A peer-led theater production advocating a smoke-free life shows some effects on students’ attitude and decision to resist offers and the temptation to smoke, and to come to the decision to live a smoke-free life and refrain from smoking the first cigarette.

The optimal cross-section design of the “Trapezoid-V” shaped drainage canal of viscous debris flow

2011 ◽  
Vol 8 (1) ◽  
pp. 103-107 ◽  
Author(s):  
Yong You ◽  
Huali Pan ◽  
Jinfeng Liu ◽  
Guoqiang Ou
Keyword(s):  
Debris Flow ◽  
Cross Section ◽  
Drainage Canal ◽  
Viscous Debris Flow ◽  
Section Design
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