Computational aspects of a softening plasticity model for plain concrete

✍ Scribed by N Bićanić; C. J Pearce

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 986 KB
• Volume: 1
• Category: Article
• ISSN: 1082-5010
• DOI: 10.1002/(sici)1099-1484(199601)1:1<75::aid-cfm4>3.0.co;2-i

✦ Synopsis

Several computational aspects of the fracture energy based softening plasticity model for plain concrete are considered. A need for a more robust stress return strategy is identified, as the basic closest point projection algorithm leads to regions of nonconvergence, associated with zones of high curvature near the compressive meridian close to the apex. The use of an intermediate stress return to an auxiliary surface to establish an improved predictor is proposed, in conjunction with a controlled scaling of stress return increments, ensuring convergence and providing an efficient and robust stress return strategy.