Preface

The numerical integration of the rate equation of an elastic–plastic material is considered. Special attention is focused on the discretization via the fully implicit backward Euler method in the small strain case with linear elasticity and the yield function a general quadratic in stress space. Here the calculation of the plastic (Lagrange) multiplier reduces to the computation of the smallest positive root of a polynomial in one variable. Explicit formulae are given for some special cases.     

前言

2005年被国际物理学界定为"世界物理年",作为对爱因斯坦百年纪念的一份礼物.1905年爱因斯坦在堪称奇迹的一年中完成了一系列开创性论文,发表在<物理学纪事>上,从此他天才的思想永远改变了世界.整个20世纪物理学与工程学众多领域的不断测试、实践和应用都源自于他的思想,即使时至今日仍是新一代科学家的灵感源泉.爱因斯坦的奇迹不只是对科学的推动和贡献,也是对所有科技工作者的激励和启示.