scholarly journals Knitted Fabric Composite Sheet Forming Simulation considering Fabric Realignment

1999 ◽  
Vol 8 (2) ◽  
pp. 096369359900800 ◽  
Author(s):  
T.C. Lim ◽  
M. Fujihara ◽  
M. Zako ◽  
S. Ramakrishna ◽  
H.M. Shang
Keyword(s):  
Sheet Forming ◽  
Constitutive Relationship ◽  
Knitted Fabric ◽  
Composite Sheet ◽  
Reinforced Polymers ◽  
Forming Simulation ◽  
Fabric Structure ◽  
Fabric Composite ◽  
Fabric Composites ◽  
Relationship Of

In recent years, sheet forming of textile reinforced polymers have shown promising future applications. It is understood that the reorientation of fabric structure at the microscopic level alters the macroscopic constitutive relationship of the composite. In this paper, a new sheet forming simulation technique is proposed and being applied to knitted fabric composites.

scholarly journals Deep Drawing of Plain Weft-Knitted Fabric Composites: Part 1.: Cup Height Analysis

1999 ◽  
Vol 8 (6) ◽  
pp. 096369359900800 ◽  
Author(s):  
T.C. Lim ◽  
S. Ramakrishna ◽  
H.M. Shang
Keyword(s):  
Deep Drawing ◽  
Shell Height ◽  
Knitted Fabric ◽  
Fabric Structure ◽  
Weft Knitted Fabric ◽  
Fabric Composite ◽  
Fabric Composites ◽  
Good Agreement

Previous investigations on forming of plain weft-knitted fabric composite sheets show the ease of stretching due to fabric loop straightening. Pure dependence on stretching alone, however, sets the limit to which the shell height can be further increased. Recent deep drawn knitted fabric composites give greater cup height in comparison to stretch formed cup. In this paper a method of predicting the achievable cup height is proposed with due consideration to the fabric structure and tool dimensions. Comparison between the theoretical and experimental cup height shows good agreement.

scholarly journals Effect of Fibre Bundle Structure on Stretch Forming Properties of Plain Weft-Knitted Fabric Composites

1999 ◽  
Vol 8 (4) ◽  
pp. 096369359900800
Author(s):  
T.C. Lim ◽  
S. Ramakrishna ◽  
H.M. Shang
Keyword(s):  
Fibre Bundle ◽  
Knitted Fabric ◽  
Shells Of Revolution ◽  
Stretch Forming ◽  
Composite Sheet ◽  
Knitted Fabrics ◽  
Weft Knitted Fabric ◽  
Fabric Composite ◽  
Fabric Composites ◽  
Bundle Structure

Knitted fabrics are known for their excellent stretchability and their flat composites have recently been shown to be easily stretch-formed into thin shells of revolution. In this paper, the stretch-forming properties are being investigated with due attention given to the fibre bundle loop structure. The capability of a plain weft-knitted fabric composite sheet to be stretch-formed is elucidated with reference to the fibre bundle structure.

scholarly journals Stretch Forming Analysis of Knitted Fabric Composites

1999 ◽  
Vol 8 (3) ◽  
pp. 096369359900800 ◽  
Author(s):  
T.C. Lim ◽  
S. Ramakrishna ◽  
H.M. Shang
Keyword(s):  
Strain Distribution ◽  
Knitted Fabric ◽  
Stretch Forming ◽  
Composite Sheet ◽  
Fabric Composite ◽  
Polymer Sheets ◽  
Fabric Composites ◽  
Forming Analysis ◽  
Distributed Strain ◽  
Good Agreement

Recently the effects of knitted fabric reinforcement on the sheet forming of polymer sheets have been investigated, and shown to provide strength and a more distributed strain. A new method for predicting the strain distribution of a stretch formed knitted fabric composite sheet is proposed in this paper. A good agreement was observed between the predicted and the experimental results.

Sheet forming simulation of knitted fabric composites considering fabric reorientation

1999 ◽  
Vol 26 (2) ◽  
pp. 209-215 ◽  
Author(s):  
T.C. Lim ◽  
M. Fujihara ◽  
M. Zako ◽  
S. Ramakrishna ◽  
H.M. Shang
Keyword(s):  
Sheet Forming ◽  
Knitted Fabric ◽  
Forming Simulation ◽  
Fabric Composites

Effect of textile geometry on axisymmetric stretch forming of knitted fabric composites

2000 ◽  
Vol 214 (4) ◽  
pp. 333-337 ◽  
Author(s):  
T C Lim ◽  
S Ramakrishna ◽  
H M Shang
Keyword(s):  
Reasonable Agreement ◽  
Convex Surface ◽  
Shell Height ◽  
Sheet Forming ◽  
Knitted Fabric ◽  
Stretch Forming ◽  
Knitted Fabrics ◽  
Excellent Quality ◽  
Tool Profile ◽  
Fabric Composites

Plain weft-knitted fabrics are known for their excellent quality to stretch and drape around a convex surface without wrinkling. In recent years, sheet forming of knitted fabric composites has been investigated in view of promising future applications. In this paper a prediction of attainable shell height is proposed with reference to the textile geometry and the tool profile. Comparison between the measured and predicted shell heights shows reasonable agreement. The present analysis should provide a guideline for manufacturers in selecting the appropriate textile geometry for satisfactory stretch forming operations of knitted fabric composites.

Effect of design parameters on the cushioning property of cellular fabric composites

2018 ◽  
Vol 89 (18) ◽  
pp. 3692-3699
Author(s):  
Chunhong Zhu ◽  
Jian Shi ◽  
Kasumi Hayashi ◽  
Hideaki Morikawa ◽  
Akio Sakaguchi ◽  
...  
Keyword(s):  
Design Method ◽  
Three Dimensional ◽  
Hollow Structure ◽  
Woven Fabric ◽  
Design Parameters ◽  
Polyurethane Elastomer ◽  
Fabric Structure ◽  
Fabric Composite ◽  
Fabric Composites ◽  
Compression Resistance

In this study, a new design method for a three-dimensional hollow structure woven fabric was proposed and the effect of cellular size on the cushioning property of the fabric-reinforced polyurethane elastomer composite was investigated. The fabric structure was analyzed from a cross-section view and the theoretical equations for the warp and weft yarns were proposed, using the fabric layer and cellular size as parameters. Nine kinds of fabrics with different layers and cellular size were fabricated with a Jacquard loom and reinforced with polyurethane elastomer to yield fabric composites. Then the effect of cellular size on the cushioning property of the fabric composites was discussed. The results showed that upon increasing the cellular size, the cellular fabric composite exhibited lower compression resistance. Moreover, the stress at a strain of 65% and the energy absorbed in the loading process were increased with decreasing cellular size. Moreover, the compression resilience was also changed with the cellular size. It can be concluded that the cellular size had an important effect on the cushioning property of the fabric composite, which can be considered as a design parameter for cushion material based on its usages.

scholarly journals Effect of Fabric Pre-stretching on the Tensile Properties of Knitted Fabric Composites

1998 ◽  
Vol 7 (3) ◽  
pp. 096369359800700 ◽  
Author(s):  
S. Ramakrishna
Keyword(s):  
Tensile Properties ◽  
Knitted Fabric ◽  
Composite Fabrication ◽  
Specific Direction ◽  
Fabric Composite ◽  
Fabric Composites

This paper illustrates the influence of fabric pre-stretching on the tensile properties of knitted fabric composites. Prior to the composite fabrication, the fabric was stretched bi-axially in wale and course directions by different amounts. It has been shown that tensile properties of the composite in a specific direction can be improved by selectively pre-stretching the fabric more in that direction. It is also found that the equi-biaxially pre-stretched fabric composite displays marginally higher tensile properties compared to the composite reinforced with 0% pre-stretched fabric.

Structure-tensile property relationship of knitted fabric composites

2001 ◽  
Vol 22 (1) ◽  
pp. 11-21 ◽  
Author(s):  
T. B. Bini ◽  
S. Ramakrishna ◽  
Zheng Ming Huang ◽  
C. T. Lim
Keyword(s):  
Tensile Property ◽  
Knitted Fabric ◽  
Property Relationship ◽  
Fabric Composites ◽  
Relationship Of
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