TY - JOUR
T1 - Extended Pile Driving Model to Predict the Penetration of the Insight/HP3 Mole into the Martian Soil
AU - Poganski, Joshua
AU - Kömle, Norbert I.
AU - Kargl, Günter
AU - Schweiger, Helmut F.
AU - Grott, Matthias
AU - Spohn, Tilman
AU - Krömer, Olaf
AU - Krause, Christian
AU - Wippermann, Torben
AU - Tsakyridis, Georgios
AU - Fittock, Mark
AU - Lichtenheldt, Roy
AU - Vrettos, Christos
AU - Andrade, José E.
PY - 2017/10/1
Y1 - 2017/10/1
N2 - The NASA InSight mission will provide an opportunity for soil investigations using the penetration data of the heat flow probe built by the German Aerospace Center DLR. The Heat flow and Physical Properties Probe (HP3) will penetrate 3 to 5 meter into the Martian subsurface to investigate the planetary heat flow. The measurement of the penetration rate during the insertion of the HP3 will be used to determine the physical properties of the soil at the landing site. For this purpose, numerical simulations of the penetration process were performed to get a better understanding of the soil properties influencing the penetration performance of HP3. A pile driving model has been developed considering all masses of the hammering mechanism of HP3. By cumulative application of individual stroke cycles it is now able to describe the penetration of the Mole into the Martian soil as a function of time, assuming that the soil parameters of the material through which it penetrates are known. We are using calibrated materials similar to those expected to be encountered by the InSight/HP3 Mole when it will be operated on the surface of Mars after the landing of the InSight spacecraft. We consider various possible scenarios, among them a more or less homogeneous material down to a depth of 3–5 m as well as a layered ground, consisting of layers with different soil parameters. Finally we describe some experimental tests performed with the latest prototype of the InSight Mole at DLR Bremen and compare the measured penetration performance in sand with our modeling results. Furthermore, results from a 3D DEM simulation are presented to get a better understanding of the soil response.
AB - The NASA InSight mission will provide an opportunity for soil investigations using the penetration data of the heat flow probe built by the German Aerospace Center DLR. The Heat flow and Physical Properties Probe (HP3) will penetrate 3 to 5 meter into the Martian subsurface to investigate the planetary heat flow. The measurement of the penetration rate during the insertion of the HP3 will be used to determine the physical properties of the soil at the landing site. For this purpose, numerical simulations of the penetration process were performed to get a better understanding of the soil properties influencing the penetration performance of HP3. A pile driving model has been developed considering all masses of the hammering mechanism of HP3. By cumulative application of individual stroke cycles it is now able to describe the penetration of the Mole into the Martian soil as a function of time, assuming that the soil parameters of the material through which it penetrates are known. We are using calibrated materials similar to those expected to be encountered by the InSight/HP3 Mole when it will be operated on the surface of Mars after the landing of the InSight spacecraft. We consider various possible scenarios, among them a more or less homogeneous material down to a depth of 3–5 m as well as a layered ground, consisting of layers with different soil parameters. Finally we describe some experimental tests performed with the latest prototype of the InSight Mole at DLR Bremen and compare the measured penetration performance in sand with our modeling results. Furthermore, results from a 3D DEM simulation are presented to get a better understanding of the soil response.
KW - Dynamic CPT
KW - Mars surface regolith
KW - Mole penetration models
KW - NASA discovery mission InSight
UR - http://www.scopus.com/inward/record.url?scp=84994448356&partnerID=8YFLogxK
U2 - 10.1007/s11214-016-0302-z
DO - 10.1007/s11214-016-0302-z
M3 - Review article
AN - SCOPUS:84994448356
SN - 0038-6308
VL - 211
SP - 217
EP - 236
JO - Space Science Reviews
JF - Space Science Reviews
IS - 1-4
ER -