ejericicio mecanica del medio continuo oliver y angelet
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Course
Mecanica del medio continuo
Institution
Universidad Autónoma De Madrid
Estos ejercicios son como ventanas a un mundo de conocimientos que te ayudarán a comprender mejor cómo se comportan los materiales y las estructuras en situaciones reales. Cada ejercicio viene con una explicación detallada y paso a paso de cómo abordar y resolver los desafíos, lo que te permit...
Para un determinado instante, el movimiento de un medio continuo viene
de
nido por:
x1 = X1 − AX3 (1)
x2 = X2 − AX3 (2)
x3 = −AX1 − AX2 + X3 (3)
Obtener el tensor gradiente material de deformaci on F (X) en dicho instante.
A partir de las ecuaciones de movimiento inversas obtener el tensor gradiente
espacial de la deformacion F −1 (X). Con los resultados obtenidos comprobar
que F −1 F = 1.
a)- Encontrar el tensor gradiente de deformacion.
X1 − AX3
⃗ = ∂ ∂ ∂
F = ⃗x ⊗ ▽ X2 − AX3 ∂x1 ∂x2 ∂x3
−AX1 + AX2 + X3
realizando la multiplicacion de matrices y su derivacion da como resultado
1 0 −A
= 0 1 −A
−A A 1
= F = ⃗x ⊗ ▽ = A2 x1 ∂x2 ∂x3
Ax1 Ax2 x3
1 + A2 −A2 A
= A2 1 − A2 A
A A 1
d)- realizar la comporbacion del tensor gradiente de deformacion con el
tensor espacial de deformacion
1 0 −A 1 + A2 −A2 A
F · F −1 = 0 1 −A A2 1 − A2 A
−A A 1 A A 1
obteniendo la matriz identidad
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