Method for analyzing post-assembly residual stresses in microwave assembly
Assignee38th Research Institute, China Electronics Technology Group Corporation
InventorsHongqi ZHANG, Wenjun SHENG
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Abstract
A method for analyzing post-assembly residual stresses in a microwave assembly, in which a three-dimensional model of the microwave assembly and a three-dimensional model of a tooling required for each high-temperature treatment are established; a finite element mesh model of the entire microwave assembly and a finite element mesh model of the tooling are established based on their respective three-dimensional models; performing simulation analysis on each high-temperature treatment process based on the finite element mesh model to obtain residual stress distribution; and superimposing the residual stress distributions of all high-temperature treatment processes to obtain a post-assembly residual stress distribution.
Claims10
A method for analyzing post-assembly residual stresses in a microwave assembly, the microwave assembly comprising a housing, a low temperature co-fired ceramics (LTCC) substrate, a connector, partition ribs, a carrier module, a plurality of components, and a cover plate, the carrier module and the plurality of components being assembled on the LTCC substrate, the carrier module comprising a carrier and a power chip assembled on the carrier, the LTCC substrate being assembled in the housing, the connector being assembled on the housing, and the partition ribs being assembled on the LTCC substrate for forming of microwave channels that are mutually isolated with one another, and the method comprising:
- obtaining a three-dimensional model of the entire microwave assembly and a three-dimensional model of a tooling required for each high-temperature treatment process based on each high-temperature treatment process involved in an assembly process of the microwave assembly;
- obtaining a finite element mesh model of the entire microwave assembly based on the three-dimensional model of the entire microwave assembly;
- obtaining a finite element mesh model of the tooling required for each high-temperature treatment process based on the three-dimensional model of the tooling required for each high-temperature treatment process;
- performing simulation analysis on each high-temperature treatment process based on the finite element mesh model to obtain a residual stress distribution of each high-temperature treatment process;
- and
- superimposing the residual stress distribution of each high-temperature treatment process to obtain a post-assembly residual stress distribution.
Dependencies are inferred from the claim text.