The substance being tested is Polyethylene. I have uploaded a picture of the fracture and the graph as jpgjrmichler said:
Anmol Dubey said:
Could you please tell me where the UTS and Yield stress would be on my graph?jrmichler said:
Welcome to PF.ahmasrieng said:
Yield strength is the amount of stress a material can withstand without permanent deformation, while ultimate tensile strength is the maximum stress a material can withstand before breaking.
The yield strength of HDPE is typically determined through a tensile test, where a sample of the material is pulled until it reaches its yield point. The yield strength is then calculated by dividing the maximum load applied during the test by the original cross-sectional area of the sample.
The yield strength of HDPE can be affected by factors such as temperature, strain rate, and the presence of any additives or fillers in the material. Additionally, the manufacturing process and any external stresses on the material can also impact its yield strength.
The ultimate tensile strength of HDPE is measured through a tensile test, similar to the one used for determining yield strength. However, in this test, the material is pulled until it breaks and the maximum load applied at the point of failure is recorded. The ultimate tensile strength is then calculated by dividing this load by the original cross-sectional area of the sample.
Yes, the yield strength and ultimate tensile strength of HDPE can be improved through various methods such as adding reinforcing fibers, increasing the molecular weight of the material, and using specialized manufacturing techniques. However, these improvements may also affect other properties of the material, so careful consideration is needed when making modifications to HDPE.