Document Type

Concrete and geopolymer materials paper

Publication details

Piscesa, B, Attard, MM & Samani, AK 2014, 'Refined plasticity model for concrete stress-strain relationship part II: inclusion of size effect', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. I, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 155-160. ISBN: 9780994152008.

Peer Reviewed



This article will discuss about the implementation of size effect into the proposed plasticity model by adjusting the plastic potential function or flow rule. A new parameter (αP0) that control the plastic dilation rate after the peak is proposed. In addition a method to include the initial plastic compacting during the plastic flow is also proposed and discussed in detail. The size effect is implemented by means of calibration the softening function in both axial direction and lateral direction with specific aspect ratio of height by width is equal to 2. Some comparison of the proposed plasticity model including the proposed plastic potential function with experimental results of several researcher is compared and discussed in detail.