Mechanical characterization on structural element level

2019 ◽  
pp. 73-93
Author(s):  
Ralf Seemann
Keyword(s):  
Mechanical Characterization ◽  
Structural Element ◽  
Element Level

scholarly journals Glulam Mechanical Characterization

2012 ◽  
Vol 730-732 ◽  
pp. 994-999
Author(s):  
Hélder S. Sousa ◽  
Jorge M. Branco ◽  
Paulo B. Lourenço
Keyword(s):  
Mechanical Properties ◽  
Strength Class ◽  
Mechanical Characterization ◽  
Structural Element ◽  
Bending Tests ◽  
Glulam Beam ◽  
Glued Laminated Timber ◽  
Normative Requirements ◽  
Type Of Failure

The glued laminated timber (glulam) mechanical properties may be evaluated through the determination of the key mechanical properties of the lamellae that compose that element. Simple bending and tension parallel to the grain tests were performed in order to assess the strength class of three glulam elements. Regarding the bending tests, 8 samples were taken from a glulam beam and assessed. Values for the resistant bending tension and both local and global modulus of elasticity were obtained. For the tension parallel to the grain tests, a total of 120 samples were assessed. The samples were divided regarding the structural element from where they were extracted as well to the type of failure mode found in the tests. The values of the lamellae properties were then used for determination of the properties of the glulam material. The data gathered from the tests was assessed statistically and concluded that the mechanical properties of the glulam elements did not fulfill the required parameters of the normative requirements.

Bioavailability of naringenin chalcone in humans after ingestion of cherry tomatoes

2020 ◽  
Vol 90 (5-6) ◽  
pp. 411-416 ◽  
Author(s):  
Carina Kolot ◽  
Ana Rodriguez-Mateos ◽  
Rodrigo Feliciano ◽  
Katharina Bottermann ◽  
Wilhelm Stahl
Keyword(s):  
Plasma Levels ◽  
Average Concentration ◽  
Biologically Active ◽  
Thiol Groups ◽  
Structural Element ◽  
Active Molecule ◽  
Reactive Center ◽  
Average Maximum ◽  
Alpha Beta ◽  
Cherry Tomatoes

Abstract. Chalcones are a type of flavonoids characterized by an α-β unsaturated structural element which may react with thiol groups to activate pathways such as the Nrf2-Keap-1 system. Naringenin chalcone is abundant in the diet but little is known about its bioavailability. In this work, the bioavailability of naringenin chalcone from tomatoes was investigated in a group of healthy men (n=10). After ingestion of 600 grams of tomatoes providing a single dose of 17.3 mg naringenin chalcone, 0.2 mg of naringenin, and 195 mg naringin plasma levels of free and conjugated naringenin and naringenin chalcone (glucuronide and sulfate) were analyzed by UHPLC-QTOF-MS at 0.5, 1, 3, and 6 h post-consumption. Plasma levels of conjugated naringenin increased to about 12 nmol/L with a maximum at about 3 h. Concentrations of free naringenin hardly elevated above baseline. Plasma levels of free and conjugated naringenin chalcone significantly increased. A maximum of the conjugated chalcone was reached at about 3 h after ingestion with an average concentration of about 0.5 nmol/L. No free chalcone was detectable at baseline but low amounts of the unconjugated compound could be detected with an average maximum of 0.8 nmol/L at about 1 h after ingestion. The data demonstrate that naringenin chalcone is bioavailable in humans from cherry tomatoes as a dietary source. However, availability is poor and intramolecular cyclisation as well as extended metabolism likely contribute to the inactivation of the reactive alpha-beta unsaturated reactive center as well as the excretion of the biologically active molecule, respectively.

Theoretical and experimental research on slip and uplift of the timber-concrete composite beam

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 7079-7099
Author(s):  
Jianying Chen ◽  
Guojing He ◽  
Xiaodong (Alice) Wang ◽  
Jiejun Wang ◽  
Jin Yi ◽  
...  
Keyword(s):  
Differential Equations ◽  
Deformation Theory ◽  
Concrete Slab ◽  
Theoretical Calculations ◽  
Structural Element ◽  
Structural Efficiency ◽  
Theoretical Investigations ◽  
New Type ◽  
Interlayer Slip ◽  
Good Agreement

Timber-concrete composite beams are a new type of structural element that is environmentally friendly. The structural efficiency of this kind of beam highly depends on the stiffness of the interlayer connection. The structural efficiency of the composite was evaluated by experimental and theoretical investigations performed on the relative horizontal slip and vertical uplift along the interlayer between composite’s timber and concrete slab. Differential equations were established based on a theoretical analysis of combination effects of interlayer slip and vertical uplift, by using deformation theory of elastics. Subsequently, the differential equations were solved and the magnitude of uplift force at the interlayer was obtained. It was concluded that the theoretical calculations were in good agreement with the results of experimentation.

Redefinisi Fungsi Desa dalam Manga Naruto dan Bande Dessinée Astérix: Sebuah Kajian Komparasi Budaya Populer

Metahumaniora ◽  
2017 ◽  
Vol 7 (3) ◽  
pp. 293
Author(s):  
Tania Intan
Keyword(s):  
Popular Culture ◽  
Rural Environment ◽  
Cultural Comparison ◽  
Structural Element ◽  
Legal Entity ◽  
Bande Dessinee ◽  
Spare Time ◽  
Popular Medium ◽  
The World ◽  
The Village

AbstrakSecara alamiah, manusia membutuhkan sarana untuk mengisi waktu luangnyasetelah bekerja keras. Satu media yang murah, mudah dijangkau, dan digemari oleh semuakalangan di seluruh dunia adalah cerita bergambar atau komik yang merupakan bagiandari budaya populer. Pada umumnya, karya paraliteratur-visual ini memang bersifat fiktifdan hanya merupakan peniruan dari kenyataan yang digambarkan secara berlebihan(grotesque). Namun demikian, di dalam komik, sering ditemukan nilai-nilai kehidupanyang bersifat universal dan abadi sehingga dianggap layak sebagai bahan kajian budaya.Naruto, salah satu manga Jepang, dan Astérix, bande dessinée dari Prancis, akan ditelitisebagai representasi dunia Timur dan Barat. Latar sebagai unsur struktural dalam karyakaryafiksi ini ternyata juga menunjukkan kesamaan mendasar, yaitu keberadaan desasebagai tempat hidup para tokohnya. Dalam tulisan ini, akan dibahas pemaknaan lainterhadap lingkungan rural tersebut, yang memiliki andil dalam pembentukan karakterpara tokoh dari kedua komik. Metode kajian komparasi budaya akan digunakan denganpenerapan teori-teori yang relevan. Penelitian singkat ini bertujuan untuk melengkapistudi mengenai komik yang belum banyak dilakukan di Indonesia.Kata kunci: Desa, komik, Naruto, Astérix, Komparasi BudayaAbstractNaturally, humans need a way to fill their spare time after working hard. Acheap, accessible and popular medium by all circles around the world is a picture or comicstory, which is part of popular culture. McCloud (1993:7) defines comics as drawings andembossed symbols in a particular order, aimed at providing information or achievingaesthetic responses from the reader. In general, this visual-paraliterature work isindeed fictitious and merely an imitation of grotesque reality. However, in the comics, itis often found that values of life that are universal and eternal so comics are consideredappropriate as a material of cultural studies. Naruto, one of the Japanese manga, andAstérix, the bande dessinée of France, are examined as a representation of the East andWest. The background as a structural element in these works of fiction also shows the basicsimilarity of the existence of the village as the place of life of the characters. According toKartohadikoesoemo (1984:16), the village is a legal entity, in which a ruling society livesits own government. In this paper, other meanings of the rural environment, which hascontributed in the character formation of the characters from both comics are discussed.The method of cultural comparative is used with the application of relevant theories. Thisbrief study aims to complete the study of comics which is still very limited in Indonesia.Keywords: Village, Comic, Naruto, Astérix, Cultural Comparison

Spectro-mechanical Characterization of Aromaticity and Maturity of Kerogens in Oil Shale at 6 nm Spatial Resolution

2018 ◽  
Author(s):  
Devon Jakob ◽  
Le Wang ◽  
Haomin Wang ◽  
Xiaoji Xu
Keyword(s):  
Spatial Resolution ◽  
Oil Shale ◽  
Infrared Imaging ◽  
Mechanical Characterization ◽  
Optical Diffraction ◽  
Chemical Compositions ◽  
Valuable Insight ◽  
Eagle Ford Shale

<p>In situ measurements of the chemical compositions and mechanical properties of kerogen help understand the formation, transformation, and utilization of organic matter in the oil shale at the nanoscale. However, the optical diffraction limit prevents attainment of nanoscale resolution using conventional spectroscopy and microscopy. Here, we utilize peak force infrared (PFIR) microscopy for multimodal characterization of kerogen in oil shale. The PFIR provides correlative infrared imaging, mechanical mapping, and broadband infrared spectroscopy capability with 6 nm spatial resolution. We observed nanoscale heterogeneity in the chemical composition, aromaticity, and maturity of the kerogens from oil shales from Eagle Ford shale play in Texas. The kerogen aromaticity positively correlates with the local mechanical moduli of the surrounding inorganic matrix, manifesting the Le Chatelier’s principle. In situ spectro-mechanical characterization of oil shale will yield valuable insight for geochemical and geomechanical modeling on the origin and transformation of kerogen in the oil shale.</p>

MECHANICAL CHARACTERIZATION OF POLYMER MATERIALS UNDER LOW STRAIN RATE LOADING

2017 ◽  
Vol 5 (3) ◽  
pp. 8
Author(s):  
KUMAR DINESH ◽  
KAUR ARSHDEEP ◽  
AGGARWAL YUGAM KUMAR ◽  
UNIYAL PIYUSH ◽  
KUMAR NAVIN ◽  
...  
Keyword(s):  
Strain Rate ◽  
Mechanical Characterization ◽  
Polymer Materials ◽  
Strain Rate Loading ◽  
Low Strain Rate

Development and mechanical characterization the of particulate polymer composite using rejects of limestone and polyester

2017 ◽  
Author(s):  
Erick Ramon Medeiros do Nascimento ◽  
Evans Ferreira ◽  
Daniel Freitas Freire Martins ◽  
Ana Batista ◽  
Fernanda Beatriz Aires de Freitas
Keyword(s):  
Polymer Composite ◽  
Mechanical Characterization
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