The present paper gives the derivation of the displacement sensitivity of truss structures made of piecewiselinear material, with respect to the cross sectional areas of bars.
本文推导了分段线性材料桁架结构的位移对截面积的灵敏度，并给出三杆桁架实例。
2
On the basis of piece-wise-linear plasticity and fracture mechanics, this article presented a 2-dimensional holonomic and nonholonomic constitutive model for cohesive crack of concrete-like materials.