ρ= lim ∆V→∈ 3 ∆m ∆V δ= 4 WL 3 Ebh 3 μ= πd 4 128 L P 1−P 2 Q q=−k dT dx u 1 = - z dω dx , u 2 = 0 , u 3 = ω ( x) Trang 23*V = ∫ A ❑ σ xz dA , M= ∫ A ❑ zσ xx dA *M = ∫ A ❑ z.σ xxdA , V = ∫ A ❑ σ xzdA Trang 25 * ê A = A A *A = A ê A A+ B = B + A (A + B) + C = A (B + C) A + 0 = A A + (- A) = 0 Trang 26¿ α ( βA ) =( αβ) A *( α +β ) A =αA + βA ¿ α ( A +B )= αA + αB
= - , = 0 , =Trang 23*V = , *M = dA , V = dATrang 25*= *A = AA+
B = B + A(A + B) + C = A (B + C)A + 0 = AA + (- A) = 0Trang 26*=
1.A = A.1 = A , 0.A = 0+++= 0F.d = FdA. = + M = FlF = M = FrM = FrC
= A = AB = ABv = v = v = AA+A , A. , AA.BA.BAB = A.C , = -A.BA = B
- CA = = A - A = + = and S = = x = x , x = X
, X = X
= = += + = + v.a = = + v.x = + + = + t = + += = A , = = -A = = +
= + .1+.t = -2At+ u = x Xu = = x Xu = = x X u = = x X = X -X =
0.5Xt= F.dX = dX. , F = = dX = .dx. , where = = F = , = , = = F = =
or = = x= = + += 3.5++0.5 , = 4 +, =d = F.d , i = 1,2,3dV = d. d d
= d d d = d d ddv = d. d d =.d d d = det F d d d= JdV= . = dA = dA
= = = da = J.dA or da = J.dA = . = d = d dd d d = 4bh = - = d =
bddy = 0 : = 2y = 1 : d = dX . dX = dx . dx = dX . . dXC = .FB = F.
= = = = . = F. = F . = = = . = = - = 2dX .E.dX
