A.φ=a+bx+cy,X=0,Y=0 It satisfies the compatibility equation V4=0 find the stress components by x=020y2=0y=020x2=0Ty=02d/0xoy=0 find the surface force components by (ox+m tyxs x=0(moy+It. XV/S Y=0 a linear stress function corresponds to the case of no surface forces and no stress The superposition of a linear function to the stress function for any problem does not affect the stresses 徐汉忠第一版20007 弹性力学第三章徐汉忠第一版2000/7 弹性力学第三章 3 A. =a+bx+cy , X=0, Y=0 • It satisfies the compatibility equation 4  =0 • find the stress components by x = 2/y 2=0 y =  2/x 2=0 xy =- 2/xy=0 • find the surface force components by (lx+m yx)s=X=0 (my+lxy)s =Y=0 • a linear stress function corresponds to the case of no surface forces and no stress . • The superposition of a linear function to the stress function for any problem does not affect the stresses