Thermo-hygro rheological behavior of materials used in the manufacture of wood-based composites
Thermo-hygro-rheology of wood-adhesive systems plays an important role during the hot pressing process of wood based composites. The principal objective of this research is to quantitatively study the thermo-hygro rheological characteristics of wood-adhesive systems used in such composites. This is with a view to providing material characteristics which may be used in simulation models of industrial hot-pressing operations. For this purpose, a specially designed miniature hot press system mounted on a servo-hydraulic testing machine was used to compress pre-formed fiber networks. The environment for each test was maintained uniform throughout the specimen by pre-treating it inside the system until the desired conditions of temperature and moisture were achieved. Experiments were conducted under a range of test conditions of load (1 to 6 MPa), temperature (25 to 150C) and moisture content (0 to 16%). A five-element rheological model was developed, and the rheological constants of materials were determined by incorporating the experimental results in the model.
- Research Organization:
- Oregon State Univ., Corvallis, OR (United States)
- OSTI ID:
- 7110501
- Resource Relation:
- Other Information: Thesis (Ph.D.)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Long-term deformational simulation of PC bridges based on the thermo-hygro model of micro-pores in cementitious composites
Damorheology: Creep-fatigue interaction in composite materials