scholarly journals Large Deformation of Woven Fabrics under Free Shearing Uni-axial Load.

1999 ◽  
Vol 55 (7) ◽  
pp. 306-314 ◽  
Author(s):  
Masayuki Takatera ◽  
Naoko Kumoda ◽  
Limin Bao ◽  
Yoshio Shimizu ◽  
Masayoshi Kamijo ◽  
...  
Author(s):  
Zheng-Dong Ma ◽  
Dongying Jiang ◽  
Yuanyuan Liu

A three-dimensional nonlinear thread formulation developed by the first two authors [1] has been extended in this paper for modeling and simulation of woven fabrics and fiber-reinforced composites of various configurations under arbitrary large deformation. The resultant model accounts for extensibility of the woven fibers in the composite, geometry nonlinearity, tension variation along the fiber, and other nonlinear effects due to the woven composition and large deformation. The new modeling effort includes the development of a contact model for simulating the contact between fibers, which can be used to predict high-fidelity behavior of woven fibers in the composite and their interactions. Matrix model is also added into the composite for studying the coupling between woven fibers and matrix material such as resin. The incremental form of original nonlinear equation is discretized using a finite element method with an iteration scheme. Two numerical examples are given to demonstrate the effectiveness of the proposed modeling technique.


2020 ◽  
Vol 118 (1) ◽  
pp. 108
Author(s):  
M.A. Vinayagamoorthi ◽  
M. Prince ◽  
S. Balasubramanian

The effects of 40 mm width bottom plates on the microstructural modifications and the mechanical properties of a 6 mm thick FSW AA6061-T6 joint have been investigated. The bottom plates are placed partially at the weld zone to absorb and dissipate heat during the welding process. An axial load of 5 to 7 kN, a rotational speed of 500 rpm, and a welding speed of 50 mm/min are employed as welding parameters. The size of the nugget zone (NZ) and heat-affected zone (HAZ) in the weld joints obtained from AISI 1040 steel bottom plate is more significant than that of weld joints obtained using copper bottom plate due to lower thermal conductivity of steel. Also, the weld joints obtained using copper bottom plate have fine grain microstructure due to the dynamic recrystallization. The friction stir welded joints obtained with copper bottom plate have exhibited higher ductility of 8.9% and higher tensile strength of 172 MPa as compared to the joints obtained using a steel bottom plate.


PCI Journal ◽  
1968 ◽  
Vol 13 (3) ◽  
pp. 12-27
Author(s):  
Robert Loov
Keyword(s):  

PCI Journal ◽  
1966 ◽  
Vol 12 (3) ◽  
pp. 52-59 ◽  
Author(s):  
Paul Zia ◽  
E. C. Guillermo

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