Test methods for the determination of the stress–strain behaviour of oriented polypropylene (OPP) tubes in uniaxial compression

In order to assess the performance of thin-walled oriented thermoplastic tubes under large strain biaxial forming conditions at various temperatures and strain rates, an understanding of the tensile and compressive behaviour of the tube along its principal directions is required. Both the tensile and compressive behaviour of these materials is required since thermoplastics are known to exhibit differences in their behaviour in tension compared …