Question

S) A) (3 pts.) In what ways might a military helicopter fail? 7helicapters Ay wer ti ham ir plares wh 3) (3 pts.) Associate cach cause for tailure from part A with a failure mechanism in part B. easin Not relate fo causes faehife 2- halit mateiat C) (3 pts.) What might you do to minimize problems associated with a military helicopter? ?Bai1)wi nghaviy mtris make ittly 6) Assume gravity is 9.80 m/s. Assume wood is a phenolic polymer and has a yield stress of 50 MPa, a modulus of elasticity of 4.0 GPa, and a Poisson's ratio of 0.36. Assume the densities of water and wood are approximately 1000 and 900 kg/m, respectively. For part C, assume that wood is isotropic (a rather poor assumption). A) (3 pts.) Calculate the bulk modulus of wood. or 3CN-2(0.3)) B) (4 pts.) Calcula the maximum strain that can be put on the wood without it being plastically deformec 50x C) (4 pts.) Calculate the maximum depth of water that you could put a wooden support beam for a bridge into without the wood plastically deforming. Based on this calculation, should you be worried? -1% D) (3 pts.) Calculate the shear modulus of the phenolic polymer.

could you please answer all these parts ?

Answer 1

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Solution A) A military helicopter folleroimg Operational Ermor fail due to Can Suast This emror ighat planmg etc can Occour 4ctual conduct of thght Mechanical Maltumchon /Eai lure when compoment of the qircratt imtendedl. O ccoums tails to Electrical Failume as when electmical SO4rce B.) Above giren all the three types of tailure degree ot human fai lure operational failvre have Some But an eeea mhy o Electrical Mechanical may lead to c). utoms should t9ke the We ) Tmprove autoratahon tmraiming Cmstall coCk pit personal Risk Management 2comeling denices u mple ment wasbard Mission specific RisK w) Establioh Manage ment Program V.) mplement stran angir ete wbehssy maintamamce - ce wbebesf

46) A. we know, 4X109 3(1-2x0.36 3(1-2v) = 7.161 GPa