Effect of temperature on tensile properties of HDPE pipe material

Abstract

The properties that make plastic of direct interest to designers and engineers are its good strength to weight ratio, low manufacturing and installation costs and high durability. The strength of polymers is known to be sensitive to temperature and this generally limits their use under service temperatures lower than the glass transition temperature. The present work addresses the effect of temperatures ranging from 210 to 70uC on the tensile properties of high density polyethylene PE-100 pipe material. Tensile tests are performed on dog bone type ASTM standard specimens. Yield stress and modulus of elasticity are found to decrease linearly with temperature. The average yield strength decreased linearly from 32 to 9 MPa when the temperature is increased from 210 to 70uC. The modulus of elasticity varied in the same fashion as the yield strength. The yield strain, however, showed a slight increase in this temperature range. Ductile fracture is observed to be the controlling failure mechanism at all the temperatures of interest. The deformation at room and high temperatures is accompanied by considerable necking. The temperature effect on the tensile properties of PE-100 pipe material is compared with that of CPVC and PVC pipe materials, used in comparable applications. In general, a similar effect was observed on yield stress, modulus of elasticity and yield strain in all these materials.

Effects of strain rate and temperature on the mechanical behavior of high‐density polyethylene

“…The development of plastic materials with specific properties allowing them to replace traditional materials like steel or wood has massively contributed to the growth of consumption of these materials. However, some of the most widely used polymers like polyolefin are inherently easier to employ than traditional materials . In fact, innovations searched are those that preserve the benefits of cost reduction, lightness, and ease of processing.…”

“…However, some of the most widely used polymers like polyolefin are inherently easier to employ than traditional materials. [1][2][3][4][5] In fact, innovations searched are those that preserve the benefits of cost reduction, lightness, and ease of processing.…”

Electro-Mechanical Design and Creep Analysis of Proposed Enclosure for Flexible Gas Insulated Line Regarding Subsurface Metropolitan Applications of High-Voltage Transmission Lines

“…Reference [42] compared the flexibility of FGIL with conventional GIL regarding HDD based underground cable laying in metropolitan vicinities. Moreover, references [43][44][45][46][47][48][49][50][51][52] suggest that aging behavior of thermoplastics due to time, temperature and mechanical loadings, needs careful consideration in order to avoid their excessive structural deformation, rapid strength degradation and early enclosure puncture. Considering the concern of enclosure's strength degradation regarding synergistic impact of aging and mechanical loadings, in this research, a flexible-thermoplastic-enclosure with significantly high structural strength, as well as flexibility, is proposed for FGIL.…”

“…Autodesk Inventor is used to develop and analyze new, as well as aged models of FGIL, as per the performed mechanical design. Concerning the aged model's development and analysis, the DIN 8074, DIN 8075, DVS 2205-1, TR-4/2018 and ISO 4437 based standard creep estimations of polyethylene (PE) 100 for the time and temperature dependent modulus, as well as stress bearing characteristics, are considered in order to investigate the aging effect for the proposed scheme [52][53][54][55][56][57][58]. COMSOL Multiphysics is used to develop and analyze the electrical model of proposed FGIL as per the performed electrical design.…”

Effects of low contents of A2M3O12 submicronic thermomiotic‐like fillers on thermal expansion and mechanical properties of HDPE‐based composites

“…Among thermoplastics, high density polyethylene (HDPE) is one of the most versatile and used polyolefin, especially in geomembranes and pipes for water or gas transportation, where its high CTE can restrain the operating performance . As a matter of fact, HDPE pipes can be used over a broad service temperature range, from −10 to 70°C , and the effects of expansion/contraction should be properly addressed to prevent and/or compensate thermal stresses that could compromise the structural integrity of a piping component, pipe joints or the structure which supports the pipe.…”