11. Stronger materials must undergo either elastic deformation or plastic deformation to absorb an impact without breaking. 12. Elastic deformation is when a material deforms and then returns to it's original shape.13. This is similar to explicit elastic deformations of the input images, which delivers excellent MNIST performance. 14. If it returns to its original shape after the load is removed, this is called elastic deformation . 15. The cycle of tectonic force being accumulated in elastic deformation and released in a sudden rebound is then repeated. 16. The following layer undergoes only an elastic deformation ; the strain and subsequent release then forms a seismic wave. 17. Elastic deformation , however, is an approximation and its quality depends on the time frame considered and loading speed.18. According to the Mechanostat, bone growth and bone loss is stimulated by the local mechanical elastic deformation of bone. 19. A static equilibrium is obtained in which elastic deformations occur as well as frictional shear stresses in the contact interface. 20. In this case, if the tangential force is reduced then the elastic deformations and shear stresses reduce as well.