scholarly journals Teaching Material Testing and Characterization with an Open, Accessible, and Affordable Mechanical Test Device

2021 ◽  
Author(s):  
Gabriella P. Sugerman ◽  
Manuel K. Rausch
Keyword(s):  
Mechanical Test ◽  
Material Testing ◽  
Teaching Material ◽  
Test Device

scholarly journals Hygro-Thermo-Mechanical Responses of Balsa Wood Core Sandwich Composite Beam Exposed to Fire

Processes ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 103 ◽  
Author(s):  
Luan TranVan ◽  
Vincent Legrand ◽  
Pascal Casari ◽  
Revathy Sankaran ◽  
Pau Loke Show ◽  
...  
Keyword(s):  
Composite Beam ◽  
Cone Calorimeter ◽  
Mechanical Test ◽  
Sandwich Composite ◽  
Test Device ◽  
Balsa Wood ◽  
Three Point Bending ◽  
Mechanical Responses ◽  
Loss Kinetic ◽  
Composite Skins

In this study, the hygro–thermo–mechanical responses of balsa core sandwich structured composite was investigated by using experimental, analytical and numerical results. These investigations were performed on two types of specimen conditions: dry and moisture saturation sandwich composite specimens that are composed of E-glass/polyester skins bonded to a balsa core. The wet specimens were immersed in distilled water at 40 °C until saturated with water. The both dry and wet sandwich composite specimens were heated by fire. The mass loss kinetic and the mechanical properties were investigated by using a cone calorimeter following the ISO 5660 standard and three-point bending mechanical test device. Experimental data show that the permeability and fire resistance of the sandwich structure are controlled by two composite skins. Obtained results allow us to understand the Hygro–Thermo–Mechanical Responses of the sandwich structured composite under application conditions.

Comparison of Cervical Disk Implants and Cervical Disk Fusion Treatments in Human Cadaveric Models

2006 ◽  
Vol 128 (4) ◽  
pp. 481-486 ◽  
Author(s):  
M. A. Davies ◽  
S. C. Bryant ◽  
S. P. Larsen ◽  
D. B. Murrey ◽  
D. S. Nussman ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Energy Absorption ◽  
Mechanical Test ◽  
Mechanical Effect ◽  
Hysteretic Behavior ◽  
Treatment Level ◽  
Test Device ◽  
Natural Energy ◽  
Cervical Disk

Articulating cervical disk implants have been proposed as an alternative to disk fusion in the treatment of cervical disk disease. To examine the mechanical effect of articulating cervical disk implants (ACDI) versus simulated cervical disk fusion, a mechanical test device was constructed and cadaveric tests were carried out. While results show little effect on the pressures above and below the treatment level, the percent hysteretic behavior of the specimens trended to be higher for the ACDI, indicating that these implants retain more of the natural energy absorption capability of the cervical spine.

Foot Injury Patterns With Protective Footwear After Lift Truck Impact

2010 ◽  
Author(s):  
William R. Bussone ◽  
Jill N. Baxter ◽  
Chimba Mkandawire
Keyword(s):  
Static Loading ◽  
Mechanical Test ◽  
Internal Displacement ◽  
Injury Patterns ◽  
Test Device ◽  
Foot Injuries ◽  
Foot Injury ◽  
External Damage

The objective of this study was to evaluate the properties and kinematics of an ASTM steel toe cage during quasi-static loading and forklift runover. Example ASTM F2413-05-compliant steel-toed shoes were loaded via forklift and via mechanical test device, and examined visually for external damage and fluoroscopically for internal displacement and damage of the steel-toed cage. Resulting displacement was quantified and analyzed to assess likely foot injuries and their location sustained by the wearer. When loaded by a lift truck, an ASTM F2413-05-compliant steel toe supported the weight without crushing, but the structure of the shoe around the steel cup did not, causing the steel toe to rotate and translate fore-aft or laterally, depending on the direction of loading. The survival of the steel toe combined with the failure of the shoe around it may lead to sparing of the toes, with crushing of the distal midfoot due either to direct or induced loading of the foot. Steel-toed shoes are unlikely to prevent injury to the midfoot or proximal phalanges when loaded by a forklift.

scholarly journals Ground reaction force estimation to assess football player movement on hybrid turfs

2020 ◽  
Author(s):  
◽  
Francesca D'Andrea
Keyword(s):  
Data Collection ◽  
Mechanical Test ◽  
Reaction Force ◽  
Football Player ◽  
Force Estimation ◽  
Test Device ◽  
Engineering Research ◽  
Sports Engineering ◽  
The People ◽  
Final Study

There are several people I would like to thank for their assistance, support and guidance throughout this research project. First of all, I would like to thank my supervisors Dr Marcus Dunn, Dr Ben Heller and Prof David James for all your time, the continued support, advice and knowledge provided over the last three years that helped me achieving this work and improving as a researcher. This gratitude extends to all members of the Sports Engineering Research Group at Sheffield Hallam University, in particular to Dr John Hart for the design of the sensor mount frame. I am grateful to adidas for the sponsorship of this project. In particular, I would like to thank Harald Koerger, Patrick Henning-Bortmes, Heiko Schlarb and KarstenWestphal. Also thank you to Marc Lamka for the help during the first data collection and to both Marc and Steven, without you it would have not been possible to reach a good cohort of participants for my final study. Furthermore, I would like to thank Labosport for sharing their Scoreplay dataset and allowing me to borrow the AA test device for six weeks of testing in Germany. These mechanical test data provided important information for this work. Also thanks to David Rigby and Tom for teaching me how to use the mechanical test devices. Apart from the people directly involved with the research, I would like to thank all my friends, both those I known for years and all the great people I met during this PhD journey. Thank you for all the laughs, chats, coffee breaks and for letting me know I can always count on your support. A huge thank goes to Linda and Ben for making me feel part of a family during these months of COVID-19 pandemic. Finally, but most importantly, thanks to my family. Thanks to my brother and my grandma for being always supportive and believing in me, and especially to my parents for all your love and support, without you I would not be the person I am now and I would have not been able to get where I am.

Design Modification of Test Device for Analyzing of Conveyor Belt Samples

2015 ◽  
Vol 803 ◽  
pp. 179-184
Author(s):  
Vieroslav Molnar ◽  
Peter Michalik
Keyword(s):  
Conveyor Belt ◽  
Material Testing ◽  
Bulk Materials ◽  
Test Device ◽  
Design Modification ◽  
Its Analysis ◽  
Different Types ◽  
Conveyor Belts ◽  
Technical University

Material testing and its analysis is nowadays a very extensive problem. Different types of materials with different sizes are tested and analyzed. By the Technical University of Košice was designed the test device for analysis of cover layers samples for conveyor belts designed for bulk materials conveying for middle and long distances in various direction with the diameters from 100 mm to 300 mm. Measurement of samples helps for the better understanding and determination of cover layers properties and it allows by measured values the next computing simulations. This paper deals with constructive modifications of the designed test device which are described in detail in this paper. For creation of the model of the test device was used SW application PTC Creo 2.0.

Effect of Stress and Relax Instructions on the Predictive Validity of a Test Device

1974 ◽  
Vol 7 (1) ◽  
pp. 46-50 ◽  
Author(s):  
Bruce W. Hall ◽  
T. Salvatore Tocco ◽  
Larry S. Schwartz
Keyword(s):  
Predictive Validity ◽  
Test Device

Developing Science Teaching Material to Increase Elementary Students’ Science Process Skill

2019 ◽  
Vol 2 (1) ◽  
pp. 53
Author(s):  
Ai Hayati Rahayu ◽  
Bunyamin Faisal Syarifudin
Keyword(s):  
Research And Development ◽  
Elementary Students ◽  
Teaching Material ◽  
Learning Material ◽  
Development Method ◽  
Process Skill ◽  
Science Process Skill ◽  
The Mean ◽  
Problem Solving Process ◽  
Development Of Students

Mastering science process skill is very beneficial in problem solving process. This research aimed to develop teaching materials such as science process skill-based textbooks on energy and its changes. The method used in this research was research and development, by using the 4D design, which include define, design, develop, and disseminate. Research and development method were used to produce a product and to test its efficiency. The result showed that the learning material fulfill the assessment criteria. The mean validation result of textbook showed a number of 3.58 indicated as a good category. Based on T test, it was proven that the use of textbooks is indeed influential towards the development of students’ science process skill.

Development Path of Anthropomorphic Test Device with Chinese Physical Signs

2019 ◽  
Vol 21 (3) ◽  
pp. 103
Author(s):  
Zhixin Liu ◽  
Yongqiang Wu ◽  
Weijie Ma
Keyword(s):  
Test Device ◽  
Development Path

PENGEMBANGAN BAHAN AJAR IPA SMP PADA TEMA ENERGI DALAM TUBUH MENGGUNAKAN METODE 4STMD

EDUSAINS ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 166-175
Author(s):  
Gia Juniar Nur Wahidah ◽  
Sjaeful Anwar
Keyword(s):  
Concept Maps ◽  
The Body ◽  
Instructional Materials ◽  
Teaching Material ◽  
Test Results ◽  
Teaching Materials ◽  
Eligibility Criteria ◽  
Material Development ◽  
Selection Step ◽  
Selection Of

Abstract This research aims to produce science teaching materials in junior level with Energy in The Body as the theme using Four Steps Teaching Material Development  (4STMD). The material is presented in an integrated way so that students can  think holistically and contextually. The method used in this study is Research and Development. In this R&D methods is used 4STMD. There are four steps done on the development of teaching materials, the selection step, structuring step, characterization, and didactic reduction. Selection step includes the selection of indicators in accordance with the demands of the curriculum which is then developed with the selection of concepts and values that are integrated with the concept of science. Structuring step includes make macro structures, concept maps, and multiple representations. Characterization's step includes preparation instruments, then  trial to students to identify difficult concepts. The last, didactic reduction was done by neglect and the annotations in the form of sketches.The test results readability aspect instructional materials lead to the conclusion that by determining the main idea, the legibility of teaching materials reached 67%, with moderate readability criteria. Test results of feasibility aspects based on the results of questionnaires to the 11 teachers lead to the conclusion that the overall, level of eligibility teaching materials reached 91% with the eligibility criteria well. Keywords: teaching materials; energy; 4STMD Abstrak Penelitian ini bertujuan untuk menghasilkan bahan ajar IPA SMP pada tema Energi dalam Tubuh menggunakan metode Four Steps Teaching Material Development (4STMD). Materi disajikan secara terpadu sehingga memacu siswa untuk berpikir secara holistik dan kontekstual. Metode penelitian yang digunakan pada penelitian ini adalah metode penelitian dan pengembangan. Dalam penelitian dan pengembangan yang ini, digunakan metode Four Steps Teaching Material Development (4STMD). Terdapat empat tahap yang dilakukan pada pengembangan bahan ajar, yakni tahap seleksi, strukturisasi, karakterisasi, dan reduksi didaktik. Tahap seleksi meliputi pemilihan indikator yang sesuai dengan tuntutan kurikulum yang kemudian dikembangkan dengan pemilihan konsep dan nilai yang diintegrasikan dengan konsep IPA. Tahap strukturisasi meliputi pembuatan struktur makro, peta konsep, dan multipel representasi dari materi. Tahap karakterisasi meliputi penyusunan instrumen karakterisasi, kemudian uji coba kepada siswa untuk mengidentifikasi konsep sulit. Tahap terakhir, yaitu reduksi didaktik konsep terhadap konsep sulit. Reduksi didaktik yang dilakukan berupa pengabaian dan penggunaan penjelasan berupa sketsa. Hasil uji aspek keterbacaan bahan ajar menghasilkan kesimpulan bahwa berdasarkan penentuan ide pokok, keterbacaan bahan ajar mencapai 67%, dengan kriteria keterbacaan tinggi. Hasil uji aspek kelayakan berdasarkan hasil angket terhadap 11 orang guru menghasilkan kesimpulan bahwa secara keseluruhan tingkat kelayakan bahan ajar mencapai 91% dengan kriteria kelayakan baik sekali. Kata Kunci: bahan ajar; energi; 4STMD  Permalink/DOI: http://dx.doi.org/10.15408/es.v8i2.2039  

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