Compression behavior of selected laser melted Al/quasicrystal composite lattice structure

2019 ◽  
Vol 31 (2) ◽  
pp. 022311
Author(s):  
N. Kang ◽  
X. Lin ◽  
J. Xu ◽  
D. Joguet ◽  
Q. Li ◽  
...  
Keyword(s):  
Lattice Structure ◽  
Compression Behavior ◽  
Composite Lattice

Conical Thermoplastic Composite Anisogrid Lattice Structure by Innovative Out-of-Autoclave Molding Process

2021 ◽  
Author(s):  
Fabrizio Quadrini ◽  
Daniele Santoro ◽  
Leandro Iorio ◽  
Loredana Santo
Keyword(s):  
Mechanical Performance ◽  
Lattice Structure ◽  
Glass Fibers ◽  
Density Measurement ◽  
Thermoplastic Composite ◽  
Molding Process ◽  
Conical Structure ◽  
Out Of Autoclave ◽  
Composite Lattice

Abstract A new manufacturing process for thermoplastic (TP) composite parts has been used to produce conical anisogrid composite lattice structure (ACLS). An out-of-autoclave (OOA) process has been prototyped by using the compaction exerted by a heat-shrink tube after its exposition to heat in oven. Narrow thermoplastic prepreg tapes have been wounded on a metallic conical patterned mold at room temperature; then, the conical structure has been inserted in the heat-shrink tube and heated. TP unidirectional prepreg tapes have been used with polypropylene matrix and glass fibers. After molding, the TP ACLS has been tested under axial and transverse compression. Conical adapters were used in the transverse loading condition to allow uniform application of the load. Density measurement has been also performed to assess the quality of the OOA process. Results of this study show that TP ACLS with complex shape may be produced with OOA solutions without affecting mechanical performance. In fact, porosity levels of the consolidate ACLS are comparable with the initial prepreg despite of the absence of vacuum during molding. Moreover, high compressive stiffness was measured along both directions without observing damages, buckling or cracks in multiple tests. In the future, this kind of technology could be used for larger ACLSs by substituting the heat-shrink tube with a narrow tape to be wound as well after lamination.

scholarly journals Structure Safety Analysis of Composite Lattice Structure with Inspection Window

2018 ◽  
Vol 22 (6) ◽  
pp. 94-103
Author(s):  
Dong-geon Kim ◽  
Ju-chan Bae ◽  
Jo-wha Son ◽  
Sang-woo Lee
Keyword(s):  
Lattice Structure ◽  
Safety Analysis ◽  
Composite Lattice

Reconfigurable Multi-Stable Helical Lattice

2020 ◽  
Author(s):  
Seán Carey ◽  
Ciarán McHale ◽  
Vincenzo Oliveri ◽  
Paul M. Weaver
Keyword(s):  
Permanent Magnets ◽  
Lattice Structure ◽  
Bacteriophage T4 ◽  
Discrete Topology ◽  
Element Analysis ◽  
Before And After ◽  
Potential Applications ◽  
Tail Structure ◽  
The Difference ◽  
Composite Lattice

Abstract As materials and engineering design tools become more complex, engineers are looking to mimic structures and systems, occurring in nature, to design more efficient mechanical structures. One such structure is a morphing composite lattice structure, whose design was inspired by the tail of the bacteriophage T4 virus [1]. To date the morphing behavior of the tail structure of the virus has been simplified by neglecting the intermolecular mechanisms that actuate the bistable behavior of the tail. This behavior has been achieved using prestressed composite flanges that are mechanically joined in alternating clockwise and anti-clockwise chiralities. The composite lattice structure has previously been proposed as an actuator for aerospace structures, replacing more complex and heavier traditional actuator structures. McHale et al. [2] have shown that the composite lattice is capable of greatly improving upon the state-of-the-art in the form of a telescopic boom for CubeSat systems. This utility provides validity in studying further enhancements on the capabilities of the structure to enhance its potential applications in the aerospace industry. This work proposes a mechanism for replicating the inter-molecular behavior that occurs in the bacteriophage T4 tail. The bonds between the inner and outer tail structures are broken and reformed, thus, driving the actuation process. This method will form a variable topology morphing system. As such, a novel category of morphing structure is presented here for the first time. The morphing topology behavior is proposed by replacing mechanical fasteners in the traditional lattice structure in select locations with a series of permanent magnets. Finite element analysis is used to calculate the difference in energies between the states before and after discrete topology changes occur, allowing the associated change in energy to be converted to a required actuation force. Varying the topology of the lattice structure allows the lattice to transition from a linear morphing actuator system to a bespoke and tunable curved actuator with potential applications in satellite dish actuation, for example.

Buckling and vibration of composite lattice elliptical cylindrical shells

2017 ◽  
Vol 233 (7) ◽  
pp. 1255-1266 ◽  
Author(s):  
AV Lopatin ◽  
EV Morozov ◽  
AV Shatov
Keyword(s):  
Finite Element ◽  
Cross Sections ◽  
Lattice Structure ◽  
Cylindrical Shells ◽  
Mode Shapes ◽  
Multiple Use ◽  
Elliptical Cross ◽  
Fundamental Frequencies ◽  
Composite Lattice ◽  
Lattice Shells

An approach to the finite element study of the buckling and dynamic behaviour of composite lattice cylindrical shells with elliptical cross sections is presented in this paper. The lattice shells are modelled as three-dimensional frame structures composed of curvilinear ribs using beam finite elements. A specialised algorithm is developed to generate the finite element model of the lattice shells based on multiple use of the repeating unit cell of the composite lattice structure. Using this model, the buckling behaviour of the shells subjected to axial loading and transverse bending are investigated. Fundamental frequencies of axial and transverse vibrations of the shells with a massive rigid disk attached to their ends are determined based on the modelling approach proposed in this work. The effects of parameters of the lattice structure on the values of critical buckling loads, buckling and vibration mode shapes, and the fundamental frequencies are examined using parametric analyses. Based on the computations, the angles of orientation of helical ribs delivering maximum critical loads and fundamental frequencies are identified. The results of this study can be applied to the design of the composite tubular bodies of spacecraft made in the form of cylindrical lattice shells with elliptical cross sections.

Arctic Building Material Reinforced by Composite Lattice Structure

2019 ◽  
Vol 945 ◽  
pp. 15-19
Author(s):  
A.F. Razin ◽  
A.A. Babichev ◽  
A.A. Skleznev
Keyword(s):  
Building Material ◽  
Composite Structures ◽  
Laboratory Tests ◽  
Lattice Structure ◽  
Construction Material ◽  
New Materials ◽  
Composite Construction ◽  
Far North ◽  
New Type ◽  
Composite Lattice

The issue of ice reinforcing by lattice anisogrid composite structures is considered in order to obtain new materials for Arctic use. The results of laboratory tests of breadboard models are obtained, the possibility of using an ice-composite construction material in conditions of the Far North is shown in principle. The questions of applicability of a new type of structures and possible directions of further research are touched upon.

scholarly journals Design and manufacturing of a composite lattice structure reinforced by continuous carbon fibers

2006 ◽  
Vol 11 (5) ◽  
pp. 515-522 ◽  
Author(s):  
Hualin Fan ◽  
Wei Yang ◽  
Bin Wang ◽  
Yang Yan ◽  
Qiang Fu ◽  
...  
Keyword(s):  
Carbon Fibers ◽  
Lattice Structure ◽  
Design And Manufacturing ◽  
Composite Lattice

Compression Behavior of Diamond Lattice Structure and Its Hall–Petch Relationship

2020 ◽  
pp. 2001024
Author(s):  
Yefeng Chen ◽  
Hang Liu ◽  
Jiawei Shen ◽  
Jianming Gong ◽  
Jiaxi Zhao
Keyword(s):  
Lattice Structure ◽  
Diamond Lattice ◽  
Compression Behavior ◽  
Petch Relationship
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