Shear and Compressive Properties of Insulation after Irradiation at 4 K

Adding an expansive agent to increase the toughness of steel fibre reinforced concrete

HKIE Transactions ◽

10.33430/v26n4thie-2019-0001 ◽

2019 ◽

Vol 26 (4) ◽

pp. 197-208

Author(s):

Leo Gu Li ◽

Albert Kwok Hung Kwan

Keyword(s):

Reinforced Concrete ◽

Steel Fibre ◽

The Other ◽

Fibre Reinforced Concrete ◽

Test Results ◽

Compressive Properties ◽

Shrinkage Cracking ◽

Steel Fibre Reinforced Concrete ◽

Expansive Agent ◽

Concrete Matrix

Previous research studies have indicated that using fibres to improve crack resistance and applying expansive agent (EA) to compensate shrinkage are both effective methods to mitigate shrinkage cracking of concrete, and the additions of both fibres and EA can enhance the other performance attributes of concrete. In this study, an EA was added to fibre reinforced concrete (FRC) to produce concrete mixes with various water/binder (W/B) ratios, steel fibre (SF) contents and EA contents for testing of their workability and compressive properties. The test results showed that adding EA would slightly increase the superplasticiser (SP) demand and decrease the compressive strength, Young’s modulus and Poisson’s ratio, but significantly improve the toughness and specific toughness of the steel FRC produced. Such improvement in toughness may be attributed to the pre-stress of the concrete matrix and the confinement effect of the SFs due to the expansion of the concrete and the restraint of the SFs against such expansion.

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Compressive properties of the lattice structure with a new process

Journal of Materials Research ◽

10.1557/jmr.2020.316 ◽

2020 ◽

Vol 35 (23-24) ◽

pp. 3157-3169

Author(s):

Qingyuan Xu ◽

Shuguang Li ◽

Runsheng Hu ◽

Mengmeng Liu ◽

Dong Wang ◽

...

Keyword(s):

Lattice Structure ◽

Compressive Properties ◽

New Process

Abstract

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Degradation of Compressive Properties of Composite Laminates Due to Spiral Shape Damage

JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES ◽

10.2322/jjsass.51.457 ◽

2003 ◽

Vol 51 (595) ◽

pp. 457-458

Author(s):

Hiroshi Suemasu ◽

Kenji Nakamura ◽

Takashi Ishikawa

Keyword(s):

Composite Laminates ◽

Compressive Properties ◽

Spiral Shape

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Quasi-static Compressive Properties and Behavior of Single-cell Miura Origami Column Fabricated by 3D Printed PLA Material

International Journal of Sustainable Transportation Technology ◽

10.31427/ijstt.2020.3.2.5 ◽

2020 ◽

Vol 3 (2) ◽

pp. 66-73

Author(s):

Farid Triawan ◽

Geraldy Cahya Denatra ◽

Djati Wibowo Djamari

Keyword(s):

Single Cell ◽

Peak Stress ◽

Absorption Capacity ◽

Compression Tests ◽

Compressive Properties ◽

Folding Pattern ◽

Column Structure ◽

Thin Walled ◽

And Behavior ◽

Initial Peak

The study of a thin-walled column structure has gained much attention due to its potential in many engineering applications, such as the crash box of a car. A thin-walled square column usually exhibits high initial peak force, which may become very dangerous to the driver or passenger. To address this issue, introducing some shape patterns, e.g., origami folding pattern, to the column may become a solution. The present work investigates the compressive properties and behavior of a square box column structure which adopts the Miura origami folding pattern. Several test pieces of single-cell Miura origami column with varying folding angle and layer height are fabricated by a 3D printer. The filament is made of Polylactic Acid (PLA), which is a brittle material. Then, compression tests are carried out to understand its compressive mechanical properties and behavior. The results show that introducing a Miura origami pattern to form a thin-walled square column can dramatically lower down the initial peak stress by 96.82% and, at the same time, increase its ductility, which eventually improves the energy absorption capacity by 61.68% despite the brittle fracture behavior.

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