Estimation of Tensile and Compression Properties of 2D Woven Jute and Kevlar Hybrid Laminate

Additively manufactured parts often comprise internal porosities due to the manufacturing process, which needs to be considered in modelling their mechanical behaviour. It was experimentally shown that additively manufactured parts’ tensile and compressive mechanical properties are different for various metallic alloys. In this study, isotropic continuum damage mechanics is used to model additively manufactured alloys’ tension and compression behaviours. Compressive stress components can shrink discontinuities present in additively manufactured alloys. Therefore, the crack closure effect was employed to describe different behaviours during uniaxial tension and compression tests. A finite element model embedded in an ABAQUS’s UMAT format was developed to account for the isotropic continuum damage mechanics model. The numerical results of tension and compression tests were compared with experimental observations for additively manufactured maraging steel, AlSi10Mg and Ti-6Al-4V. Stress–strain curves in tension and compression of these alloys were obtained using the continuum damage mechanics model and compared well with the experimental results.

Download Full-text

Evaluation and validation of mechanical properties of steel strip embedded unidirectional E-glass fiber reinforced hybrid laminate

Materials Today Proceedings ◽

10.1016/j.matpr.2020.11.072 ◽

2020 ◽

Author(s):

Sudhir W. Burande ◽

Deepak V. Bhope

Keyword(s):

Mechanical Properties ◽

Glass Fiber ◽

Steel Strip ◽

Fiber Reinforced ◽

Glass Fiber Reinforced ◽

Hybrid Laminate

Download Full-text

A compact low-noise frontend for interleaved Rx/Tx arrays at K-/Ka-Band

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078721000404 ◽

2021 ◽

pp. 1-7

Author(s):

Anton Sieganschin ◽

Thomas Jaschke ◽

Arne F. Jacob

Keyword(s):

Insertion Loss ◽

Printed Circuit Board ◽

Noise Figure ◽

Low Noise ◽

Single Band ◽

Circuit Board ◽

Dual Band ◽

Ka Band ◽

Compression Properties ◽

The Individual

Abstract This contribution deals with a frontend for interleaved receive (Rx)-/transmit (Tx)-integrated phased arrays at K-/Ka-band. The circuit is realized in printed circuit board technology and feeds dual-band Rx/Tx- and single-band Tx-antenna elements. The dual-band element feed is composed of a substrate-integrated waveguide (SIW) diplexer with low insertion loss, a low-noise amplifier (LNA), a bandpass filter, and several passive transitions. The compression properties of the LNA are identified through two-tone measurements. The results dictate the maximum allowable output power of the power amplifier. The single band feed consists of a SIW with several transitions. Simulation and measurement results of the individual components are presented. The frontend is assembled and measured. It exhibits an Rx noise figure of 2 dB, a Tx insertion loss of ~ 2.9 dB, and an Rx/Tx-isolation of 70 dB. The setup represents the unit cell of a full array and thus complies with the required half-wave spacing at both Rx and Tx.

Download Full-text

Microstructural features and excellent compression properties of a novel Al0.7CoCrFeNiTi0.3 high entropy alloy

Materials Letters ◽

10.1016/j.matlet.2020.129246 ◽

2021 ◽

Vol 286 ◽

pp. 129246

Author(s):

Xianzhe Zhong ◽

Qingming Zhang ◽

Fuqing Jiang ◽

Yongming Yan ◽

Zhiwei Wang ◽

...

Keyword(s):

High Entropy Alloy ◽

High Entropy ◽

Compression Properties

Download Full-text

Compressive Strength of Modified FRP Hybrid Bars

Materials ◽

10.3390/ma13081898 ◽

2020 ◽

Vol 13 (8) ◽

pp. 1898

Author(s):

Marek Urbański

Keyword(s):

Compressive Strength ◽

Modulus Of Elasticity ◽

Basalt Fiber ◽

Test Method ◽

Fiber Reinforced Polymer ◽

Fiber Reinforced ◽

Free Length ◽

Compression Properties ◽

Reinforced Polymer ◽

Frp Bars

A new type of HFRP hybrid bars (hybrid fiber reinforced polymer) was introduced to increase the rigidity of FRP reinforcement, which was a basic drawback of the FRP bars used so far. Compared to the BFRP (basalt fiber reinforced polymer) bars, modification has been introduced in HFRP bars consisting of swapping basalt fibers with carbon fibers. One of the most important mechanical properties of FRP bars is compressive strength, which determines the scope of reinforcement in compressed reinforced concrete elements (e.g., column). The compression properties of FRP bars are currently ignored in the standards (ACI, CSA). The article presents compression properties for HFRP bars based on the developed compression test method. Thirty HFRP bars were tested for comparison with previously tested BFRP bars. All bars had a nominal diameter of 8 mm and their nonanchored (free) length varied from 50 to 220 mm. Test results showed that the ultimate compressive strength of nonbuckled HFRP bars as a result of axial compression is about 46% of the ultimate strength. In addition, the modulus of elasticity under compression does not change significantly compared to the modulus of elasticity under tension. A linear correlation of buckling load strength was proposed depending on the free length of HFRP bars.

Download Full-text