Failure criterion of composite materials are: ____.
A. Tsai – Hill criterion
B. Mohr criterion
C. Hoffman criterion
D. Tsai – Wu criterion
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To improve the efficiency and reduce the cost, manufacturing technologies of composite materials mainly include: ____.
Automatic Tape Laying machine
B. RTM molding
C. RFI molding
D. Autoclave molding
The development trend in structural design of aircraft includes: ____.
A. From isotropic structure to anisotropic structure
B. From metals to nonmetals
C. From structural weldments to integral parts
D. From common structure to intelligent material structure
The methods for space probe detect planets include: ____.
A. Probe by orbiting
B. Sampling and return
Close observation by passing close
D. On-site investigations
A spacecraft generally consists of several parts such as: ____.
A. The re-entry module
B. The orbital module
C. The living module
D. The service module
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