【摘要】 本文应用固有应变理论,在把弹塑性应力场写成的形式下,建立了边界元法的拟线性解。所提供的方法可用于分析理想塑性、应变硬化和软化材料。它兼具边界元法和固有应变法两者的长处,需要准备的数据少,无论是加载或卸载都无需进行迭代,并有很好的计算精度。对于工程实际中只有局部产生塑性变形的问题,该方法的好处更为明显。更多还原

【Abstract】 Based upon the eigenstram theory and stress expression of σ = σa + Φ·εp,a qua-silinear solution in elastoplastic B.E.M. is presented. "Where σa is the fictitious linear elastic stress coresponding to external loads and Φ is the influence matrix of plastic strain. The method can he used to solve elastoplastic problems for ideal plastic, hardening and softening materials. It does not require iterative caleultion both in loading and unloading process.The accuracy and feasibility of the method are demonstrated by some numerical examples.更多还原