Mechanical properties of recycled thermoplastics
The widespread use of recycled plastics has been restricted in part because of the limited state of knowledge about the behavior of this recycled material and the lack of unified design procedures. The material behaves differently in tension and compression, and the non-linear nature of recycled plastic makes some parameters, such as modulus of elasticity, difficult to determine. Generally, there is no clearly defined yield point. This paper analyses the properties of recycled thermoplastics, and analyses also the methods of testing recycled material members in both axial compression and flexure. In an effort to provide means for analysis of recycled plastic, material tests of discrete portions of beams were performed to develop an uniaxial material model. The model was used to predict member response based on section geometry alone. This enables prediction of member response of sections not yet tested or even constructed with greater accuracy than previously possible, regardless of the differences in tension-compression behavior and material nonlinearities or variations in material properties among manufacturers.
Keywords: mechanical properties, recycled thermoplastics, tension and compression tests
Journal of Modeling, Design and Management of Engineering Systems, Vol. 3 (1) 2005: pp. 1-13