{"title":"环氧树脂封装材料固化过程的模拟和实验验证","authors":"M. Politi, O. Breuer, Y. Cohen","doi":"10.1007/s11340-023-01000-6","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><p>Reliable numerical predictive tools are instrumental in the high-end and robust design of encapsulated electronic assemblies. Process optimization and residual stress calculations require a rigorous cure simulation, which considers the transient chemical, thermal and mechanical constitutive behavior of the curing resin. Though this subject has been widely studied for epoxy-based composite materials, fewer studies have been presented on a non-reinforced bulk of low glass-transition temperature (Tg) resin.</p><h3>Objective</h3><p>This research aims to numerically and experimentally study the cure behavior and the development of residual stresses and strains in such epoxy based encapsulants.</p><h3>Methods</h3><p>The computational study is performed using a commercially available finite element cure process analysis software, and the experimental study is performed by a specially designed test specimen, employing various strain sensing techniques.</p><h3>Results</h3><p>The results show good compatibility between experimental and numerical predictions of the thermal behavior and cure-induced residual stresses, which validates the use of the simulative tool for process design. Process induced stress relaxation in the resin is numerically and experimentally demonstrated, which enables a mapping of the process stages at which full viscoelastic modeling is required. The substantial effect of chain mobility on cure shrinkage and residual stress development in this type of materials is numerically demonstrated.</p><h3>Conclusion</h3><p>The extensive numerical and experimental investigation of the cure process performed in this study provided insights to both process modeling and design.</p></div>","PeriodicalId":552,"journal":{"name":"Experimental Mechanics","volume":null,"pages":null},"PeriodicalIF":2.0000,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Simulation and Experimental Validation of the Cure Process of an Epoxy-Based Encapsulant\",\"authors\":\"M. Politi, O. Breuer, Y. Cohen\",\"doi\":\"10.1007/s11340-023-01000-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Background</h3><p>Reliable numerical predictive tools are instrumental in the high-end and robust design of encapsulated electronic assemblies. Process optimization and residual stress calculations require a rigorous cure simulation, which considers the transient chemical, thermal and mechanical constitutive behavior of the curing resin. Though this subject has been widely studied for epoxy-based composite materials, fewer studies have been presented on a non-reinforced bulk of low glass-transition temperature (Tg) resin.</p><h3>Objective</h3><p>This research aims to numerically and experimentally study the cure behavior and the development of residual stresses and strains in such epoxy based encapsulants.</p><h3>Methods</h3><p>The computational study is performed using a commercially available finite element cure process analysis software, and the experimental study is performed by a specially designed test specimen, employing various strain sensing techniques.</p><h3>Results</h3><p>The results show good compatibility between experimental and numerical predictions of the thermal behavior and cure-induced residual stresses, which validates the use of the simulative tool for process design. Process induced stress relaxation in the resin is numerically and experimentally demonstrated, which enables a mapping of the process stages at which full viscoelastic modeling is required. The substantial effect of chain mobility on cure shrinkage and residual stress development in this type of materials is numerically demonstrated.</p><h3>Conclusion</h3><p>The extensive numerical and experimental investigation of the cure process performed in this study provided insights to both process modeling and design.</p></div>\",\"PeriodicalId\":552,\"journal\":{\"name\":\"Experimental Mechanics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.0000,\"publicationDate\":\"2023-09-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Experimental Mechanics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11340-023-01000-6\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, CHARACTERIZATION & TESTING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Experimental Mechanics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11340-023-01000-6","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CHARACTERIZATION & TESTING","Score":null,"Total":0}
Simulation and Experimental Validation of the Cure Process of an Epoxy-Based Encapsulant
Background
Reliable numerical predictive tools are instrumental in the high-end and robust design of encapsulated electronic assemblies. Process optimization and residual stress calculations require a rigorous cure simulation, which considers the transient chemical, thermal and mechanical constitutive behavior of the curing resin. Though this subject has been widely studied for epoxy-based composite materials, fewer studies have been presented on a non-reinforced bulk of low glass-transition temperature (Tg) resin.
Objective
This research aims to numerically and experimentally study the cure behavior and the development of residual stresses and strains in such epoxy based encapsulants.
Methods
The computational study is performed using a commercially available finite element cure process analysis software, and the experimental study is performed by a specially designed test specimen, employing various strain sensing techniques.
Results
The results show good compatibility between experimental and numerical predictions of the thermal behavior and cure-induced residual stresses, which validates the use of the simulative tool for process design. Process induced stress relaxation in the resin is numerically and experimentally demonstrated, which enables a mapping of the process stages at which full viscoelastic modeling is required. The substantial effect of chain mobility on cure shrinkage and residual stress development in this type of materials is numerically demonstrated.
Conclusion
The extensive numerical and experimental investigation of the cure process performed in this study provided insights to both process modeling and design.
期刊介绍:
Experimental Mechanics is the official journal of the Society for Experimental Mechanics that publishes papers in all areas of experimentation including its theoretical and computational analysis. The journal covers research in design and implementation of novel or improved experiments to characterize materials, structures and systems. Articles extending the frontiers of experimental mechanics at large and small scales are particularly welcome.
Coverage extends from research in solid and fluids mechanics to fields at the intersection of disciplines including physics, chemistry and biology. Development of new devices and technologies for metrology applications in a wide range of industrial sectors (e.g., manufacturing, high-performance materials, aerospace, information technology, medicine, energy and environmental technologies) is also covered.