Prediction of the Tensile Properties of Sheet Metal Composites

1975 ◽  
Vol 97 (1) ◽  
pp. 10-13 ◽  
Author(s):  
J. G. Beese ◽  
G. M. Bram
Keyword(s):  
Theoretical Analysis ◽  
Tensile Properties ◽  
Sheet Metal ◽  
Metal Composites ◽  
Rule Of Mixtures ◽  
Empirical Rule

Sheet metal laminates are becoming more widely used because of advantageous combinations of the properties of their component parts. Theoretical equations have been developed to predict the tensile properties of laminates to aid selection from the list of many possible combinations of different materials. The equations have been used to predict the values of the tensile properties of copper/steel and aluminum/steel composites; these predictions have been checked against measured values. An empirical rule of mixtures is often used to predict the properties of laminates; the theoretical analysis has been used to justify, or otherwise, the use of this simple linear realtionship.

HYPERNOM ALLOY

Alloy Digest ◽  
1990 ◽  
Vol 39 (9) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Sheet Metal ◽  
Base Alloy ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
High Permeability ◽  
Technology Corporation ◽  
Carpenter Technology Corporation ◽  
Nickel Base

Abstract HYPERNOM alloy is a high-permeability, low-hysteresis nickel-base alloy which is provided with the correct temper for sheet metal cold formability for shielding components. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on forming, heat treating, and joining. Filing Code: Ni-385. Producer or source: Carpenter Technology Corporation.

Theoretical analysis of the yarn fracture mechanism of self-twist jet vortex spinning

2016 ◽  
Vol 87 (11) ◽  
pp. 1394-1402 ◽  
Author(s):  
Chenchen Han ◽  
Wenliang Xue ◽  
Longdi Cheng ◽  
Zhuanyong Zou
Keyword(s):  
Theoretical Analysis ◽  
Tensile Properties ◽  
Contact Area ◽  
Fracture Mechanism ◽  
The Self ◽  
Mutual Contact ◽  
Spun Yarn ◽  
Spinning Speed

According to the yarn mechanism of self-twist jet vortex spinning, this article analyzes the structure and the fracture mechanism of self-twist jet vortex spinning yarn. Combined with experiments, this article established that the fiber in self-twist jet vortex spun yarn has self-twist, which increases the mutual contact area and the cohesion between the fibers in the yarn. This is helpful to improve the evenness and tensile properties of jet vortex spun yarn. The self-twist jet vortex spinning can keep the high spinning speed of the jet vortex spinning at the same time. The research on self-twist jet vortex spinning lays the foundation for the research and the development of jet vortex spinning.

Deep Drawing of One-Sided, Stiffness Increasing Sheet Metal Composites

2016 ◽  
Vol 716 ◽  
pp. 879-890
Author(s):  
Dennis Hofmann ◽  
Mathias Liewald
Keyword(s):  
Sheet Metal ◽  
Deep Drawing ◽  
Global Optimum ◽  
Main Concern ◽  
Forming Process ◽  
Metal Composites ◽  
Forming Characteristics ◽  
Bead Height ◽  
Stability And Accuracy ◽  
Stiffness And Damping

Hybrid sheet metal composites do show advantages compared to monolithic materials when strength, stiffness, and damping characteristics are set to a global optimum. Even though the mechanical properties of hybrid sheet metal composites have been improved in recent years, the application of such hybrid materials in the automotive industry is not well-established due to insufficient knowledge about their forming characteristics (e.g. in deep drawing process). Stiffness increasing composites consist of two metal sheets and a viscoelastic damping layer in-between: the outer sheet reveals stamped beads which increases stiffness of composite while the inner sheet serves as cover sheet. This paper deals with challenges of formability of stiffness increasing composites in industrial deep-drawing processes. The main concern is dimensional stability and accuracy of those layered materials after finishing the forming process. In order to ensure accuracy of formed parts, a methodology was developed for increased quality of sheet metal composites. Depending on the drawing limit ratios and blankholder forces, which evaluate the drawability of component in general, the drawing limit ratio is influenced for profound or insufficient residual bead heights and widths. Besides insufficient bead height, which causes a reduction in moment of inertia, inner marks on the visible outer sheet hamper a broad application in practical use. Finally, paper provides detailed recipies for manufacturing and tool layout for deep drawing objectives of such composite material.

Damage tolerant fibre reinforced sheet metal composites

1977 ◽  
Vol 287 (1338) ◽  
pp. 17-43 ◽  
Keyword(s):  
Sheet Metal ◽  
Applied Load ◽  
Experimental Studies ◽  
Tensile Load ◽  
Metal Composites ◽  
Central Crack ◽  
Observed Behaviour ◽  
Fail Safe ◽  
Damage Tolerant ◽  
Safe Load

Theoretical and experimental studies have been made of the effect of non-fracturing reinforcing members on the growth of a central crack in metal and polymeric sheets subjected to a uniform tensile load. The crack has been aligned perpendicularly to the reinforcing members which have been oriented in the same direction as the applied load. As a consequence of interactions between the non-fracturable and fracturable components of the composite structure, crack growth in the latter is inhibited severely. At the same time the non-fracturing reinforcing members provide a residual fail-safe load bearing capability. Tolerable agreement is observed between the predictions of the proposed theory and the observed behaviour of experimental samples.

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