Hypervelocity impact computations with finite elements and meshfree particles

Elastic-plastic effect study in hypervelocity impact by SPH method

“…Computed results with just state equations are almost the same as that with constitution model. The achromatic images are from experimental radiograph at 0.0, 8.1 and 23.2 µs in literature [1]. The computed sphere shape are similar to the experimental shape but are obviously flattened in the impact direction and there are more neat corners which show the insufficiency of strength in local area.…”

“…In the result of [1] projectile material is colored red, and target material blue, while projectile and target material are displayed according to density grading in results of this paper. The computed debris-cloud results are similar to the computed results in [1]. The size of backward cone is underpredicted in the same way while the forward cone is more close to the test data.…”

“…8 the left is radiograph, the middle is computed result in [1] and the right is computed result in the aforementioned computational approach. In the result of [1] projectile material is colored red, and target material blue, while projectile and target material are displayed according to density grading in results of this paper. The computed debris-cloud results are similar to the computed results in [1].…”

“…In spacecraft protection problems the velocity of impact objects is generally higher than ten kilometers per second. In the computer simulation of this kind of hypervelocity impact issue Lagrangian methods seem to be more favored than Euler methods because of the development of meshfree Lagrangian algorithms which aren't puzzled by large deformations [1].…”

An engineering model to describe fragments clouds propagating inside spacecraft in consequence of space debris impact on sandwich panel structures

“…As regards debris cloud description, a quite significant amount of experimental as well as numerical results is available in the technical literature with reference to simple plate targets, for which fragments properties are reported for different impact conditions [24,10,9,17,4,23,1,14,2,7,25,6,8]. However, the vast majority of these references considers only aluminum-alloy plates, and debris cloud information is given in a rather heterogeneous way which makes difficult to extrapolate a single synthesis model.…”