Prediction of Mechanical Properties for Curved Dumbbell‐Shaped Specimen at Different Orientation Angles of Ring Hoop Tension Test

Abstract

Manufacturing processes of polymeric plastic pipes play an important role and effect on their mechanical behavior. These processes cause a significant difference in the mechanical behavior between traditional tensile test specimens from the basic materials and final product of plastic pipes. The present study is focused on the mechanical behavior of ring specimens cut from pipes in the circumferential direction to obtain accurate materials design data during checking the quality of the final product for the plastic pipes. The experimental work is conducted at different crosshead speeds (VC.H = 10–1000 mm min−1) and different loading angles relative to the location of the dumbbell shaped (DBS) (α = 0°, 30°, 45°, 60°, and 90°) to study the mechanical properties of the ring hoop tension test (RHTT) specimens. The effect of loading angle of RHTT specimen is investigated at constant crosshead speed equal 50 mm min−1. The tensile test results show that the engineering hoop yield strength is maximized at loading angle, 90° for both single and double configurations compared with all loading angles at crosshead speed 50 mm min−1. The experimental results predict the yield point on the curved surface of DBS configuration based on the vertical displacement of the movable head for tensile testing machine.

Experimental Evaluation of Hoop Stress–Strain State of 3D-Printed Pipe Ring Tensile Specimens

“…This is a process whereby a conical shaft is inserted into the formed glowing sample, which, by passing through the sample, radially expands the pipe to the desired diameter. The second is the production of polymer pipes, which causes a significant difference in the mechanical behavior between traditional tensile test specimens from basic materials and the final product of plastic pipes [1]. Due to the long distance and complex terrain of pipeline transportation, high toughness, fatigue resistance, corrosion resistance, and fracture resistance are necessary properties of pipeline materials [2].…”

Investigating the effect of the aging process on LDPE composites with UV protective additives

“…Since its molecular structure is branched, its crystallization rate is relatively low and its melting point is around 110 C. By its superior properties such as durability and low weight, LDPE provides several advantages in the automotive industry such as fuel-saving, chemical resistance, ease of processing, corrosion resistance, and electrical insulation. 1,2 Despite the advancements in the technological development of synthetic fibers, natural fibers such as flax, hemp, kenaf, jute, and coconut fibers have recently been used as a replacement for glass fibers in many sectors today, especially in the automotive industry, due to their various properties. [3][4][5][6][7][8][9][10][11] Cellulosic-based fiber-reinforced composite structures are intensively used in engineering products to improve their mechanical properties because of their advantages such as low density, biodegradability, low cost, and easy recyclability.…”

“…By its superior properties such as durability and low weight, LDPE provides several advantages in the automotive industry such as fuel-saving, chemical resistance, ease of processing, corrosion resistance, and electrical insulation. 1,2…”