Question

2) One scenario that has been examined in the failure investigation of the Space Shuttle Columbia is the impact of a chunk of polyamide foam of mass of 1.211 kg, of dimensions of 0.508 m wide x 0.406 m long x 0.152 m tall, traveling at 457.3 m/s with a thermal heat-shielding tile, essentially composed of silica (SiO) A) (4 pts.) Calculate the kinetic energy with which the polyamide foam hit the silica tile. KE MV2 (57-12662415 B) (7 pts.) Use your textbook to determine silica's modulus of elasticity (E), the yield stress (YS), the ultimate tensile strength (UTS). percent elongation (the amount of strain multiplied by 100 % ) at failure, the coefficient of thermal expansion (CTE), and the fracture toughness (also known as the critical stress-intensity factor). Use SI units. Assume the worst case K1c Yso4lpa oter 25 C) (6 pts.) Assume the ultimate compressive strength is equal to the ultimate tensile strength. Sketch the stress-strain curve for silica along with the YS, UCS, MOE, RS, and the strain at the yield stress and the strain at failuce. D) (9 pts.) Assume that the silica is highly cfficient at transferring the load from the point of impact and distributing the load cqually over the whole tile (Cross-sectional area .005 m2 with a thickness of 0.05 m). Calculate the amount of energy in Joules that a silica tile would be capable of absorbing without plastically deforming. s e, not のs -3 faes V fat Thy lme (Laux lo E) (2 pts.) Comparing your results of parts D and A, would the silica tile elastically absorb the impact? F) (4 pts.) Compute the amount of plastic deformation that the silica tile can absorb Plashic acarhation O

could you please answer all these parts?

Answer 1

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A= o.0oS m2 emisg absarbing capae 2 2 !x(04x 106) 73 X (09 7 kJ thom cnergeabsobirg sitout plastiahy past A inmpact ohstically henca UTs 1o4 X lo 73 xlo3