scholarly journals Tensile impact testing on polymer materials considering the force-oscillation phenomenon

2017 ◽  
Author(s):  
Christian Hopmann ◽  
Jan Klein ◽  
Maximilian Schöngart
Keyword(s):  
Impact Testing ◽  
Polymer Materials ◽  
Tensile Impact ◽  
Force Oscillation ◽  
Oscillation Phenomenon

Reducing variation in tensile impact testing of plastics

2019 ◽  
Vol 26 (2) ◽  
pp. 190
Author(s):  
Hari Prasad ◽  
Narayana Rao ◽  
Prasanta Mukhopadhyay
Keyword(s):  
Impact Testing ◽  
Tensile Impact

Preliminary Assessment of NDE Methods on Inspection of HDPE Butt Fusion Piping Joints for Lack of Fusion

2009 ◽  
Author(s):  
Susan L. Crawford ◽  
Steven R. Doctor ◽  
Anthony D. Cinson ◽  
Stephen E. Cumblidge ◽  
Michael T. Anderson
Keyword(s):  
High Speed ◽  
Power Plants ◽  
Impact Test ◽  
Pacific Northwest National Laboratory ◽  
The United States ◽  
Impact Testing ◽  
Butt Joints ◽  
Lack Of Fusion ◽  
Tensile Impact ◽  
Joint Integrity

Studies at the Pacific Northwest National Laboratory in Richland, Washington, are being conducted to evaluate nondestructive examination approaches for inspecting butt fusion joints in high density polyethylene (HDPE) pipe for lack of fusion (LOF). The work provides information to the United States Nuclear Regulatory Commission on the effectiveness and need for volumetric inspection techniques of HDPE butt fusion joints in Section III, Division 1, Class 3, buried piping systems in nuclear power plants. This paper describes results from preliminary assessments using ultrasonic nondestructive techniques and high-speed tensile impact testing for determining joint integrity. A series of butt joints were fabricated in 3408, 12-inch IPS DR-11 material by varying the fusion parameters in attempts to provide good joints and joints containing LOF. These butt joints were visually examined and volumetrically examined with time-of-flight diffraction (TOFD) and phased-array (PA) ultrasound. A limited subset of pipe joint material was destructively analyzed by either slicing through the joint and visually examining the surface or by employing a standard high-speed tensile impact test. Initial correlation of the fusion parameters, nondestructive, and destructive evaluations have shown that areas with gross LOF were detected with both TOFD and PA ultrasound and that the tensile impact test showed a brittle failure at the joint. There is still some ambiguity in results from the less obvious LOF conditions. Current work is targeted on assessing the sensitivity of the ultrasonic volumetric examinations and validating the results with a destructive analysis. It is expected that on-going and future work will lead to quantifying the ultrasonic responses in terms of joint integrity.

scholarly journals Full-Density Fused Deposition Modeling Dimensional Error as a Function of Raster Angle and Build Orientation: Large Dataset for Eleven Materials

2018 ◽  
Author(s):  
Sherri L. Messimer ◽  
Tais Rocha Pereira ◽  
Albert E. Patterson ◽  
Maliha Lubna ◽  
Fabiano O. Drozda
Keyword(s):  
Fused Deposition Modeling ◽  
Fiber Composite ◽  
Impact Testing ◽  
Polymer Materials ◽  
Full Density ◽  
Large Dataset ◽  
Dimensional Error ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Accuracy And Repeatability

This report describes the collection of a large dataset (6930 measurement) on dimensional error in the fused deposition modeling (FDM) additive manufacturing process for full-density parts. Three different print orientations were studied, as well as seven raster angles (0°, 15°, 30°, 45°, 60°, 75°, and 90°) for the rectilinear infill pattern. All measurements were replicated ten times on ten different samples to ensure a comprehensive dataset. Eleven polymer materials were considered: acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), high-temperature PLA, wood-composite PLA, carbon-fiber-composite PLA, copper-composite PLA, aluminum-composite PLA, high-impact polystyrene (HIPS), polyethylene terephthalate glycol-enhanced (PETG), polycarbonate, and synthetic polyamide (nylon). The samples were ASTM-standard impact testing samples, since this geometry allows the measurement of error on three different scales; the nominal dimensions were 3.25mm thick, 63.5mm long, and 12.7mm wide. This dataset is intended to give engineers and product designers a benchmark for judging the accuracy and repeatability of the FDM process for use in manufacturing of end-user products.

scholarly journals Full-Density Fused Deposition Modeling Dimensional Error as a Function of Raster Angle and Build Orientation: Large Dataset for Eleven Materials

2019 ◽  
Vol 3 (1) ◽  
pp. 6 ◽  
Author(s):  
Sherri Messimer ◽  
Tais Pereira ◽  
Albert Patterson ◽  
Maliha Lubna ◽  
Fabiano Drozda
Keyword(s):  
Fused Deposition Modeling ◽  
Fiber Composite ◽  
Impact Testing ◽  
Polymer Materials ◽  
Full Density ◽  
Large Dataset ◽  
Dimensional Error ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Accuracy And Repeatability

This paper describes the collection of a large dataset (6930 measurements) on dimensional error in the fused deposition modeling (FDM) additive manufacturing process for full-density parts. Three different print orientations were studied, as well as seven raster angles ( 0 ∘ , 15 ∘ , 30 ∘ , 45 ∘ , 60 ∘ , 75 ∘ , and 90 ∘ ) for the rectilinear infill pattern. All measurements were replicated ten times on ten different samples to ensure a comprehensive dataset. Eleven polymer materials were considered: acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), high-temperature PLA, wood-composite PLA, carbon-fiber-composite PLA, copper-composite PLA, aluminum-composite PLA, high-impact polystyrene (HIPS), polyethylene terephthalate glycol-enhanced (PETG), polycarbonate, and synthetic polyamide (nylon). The samples were ASTM-standard impact-testing samples, since this geometry allows the measurement of error on three different scales; the nominal dimensions were 3 . 25 mm thick, 63 . 5 mm long, and 12 . 7 mm wide. This dataset is intended to give engineers and product designers a basis for judging the accuracy and repeatability of the FDM process for use in manufacturing of end-user products.

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