Methods of test for petroleum and its products. BS 2000-519. Bitumen and bituminous binders. Determination of the tensile properties of bituminous binders by the tensile test method

2004 ◽  
Keyword(s):  
Tensile Test ◽  
Tensile Properties ◽  
Test Method ◽  
Bituminous Binders

3D-printed polypropylene transtibial sockets: Mechanical behavior

2020 ◽  
pp. 095440622094392
Author(s):  
MacArthur L Stewart
Keyword(s):  
3D Printing ◽  
Yield Strength ◽  
Tensile Test ◽  
Tensile Properties ◽  
Material Properties ◽  
Standard Test ◽  
Test Method ◽  
Material Behavior ◽  
Cross Sectional ◽  
3D Printed

This paper defines the tensile properties of a successfully worn 3D-printed transtibial socket. The socket was printed from a proprietary polypropylene filament and FDM 3D-printing process. Fused disposition modeling involves producing successive cross-sectional layers on top of one another and welding them together. Because of this, a notch is formed between the printed layers. As part of this investigation, tensile test specimens were die-cut perpendicular to the material direction and tested according to ASTM D638—Standard Test Method for Tensile Properties of Plastics. From the measured load–elongation data, stress–strain curves and the corresponding material properties were determined, including modulus of elasticity E, Poisson’s ratio ν, yield strength Sy, and ultimate strength Su. The average values for each of these material properties were 955 MPa, 0.35, 11.4 MPa, and 16.3 MPa, respectively. In addition to defining tensile properties, this work demonstrated a viable methodology for characterizing the as-built material behavior of 3D-printed sockets.

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