Deformation characteristics and formability of fibre-reinforced thermoplastic sheets

Profile forming of pre-pressed wood-strand preforms

“…In the mapping methods, the sheet dimensions, fiber geometry, and tool profile are required to obtain the shape and strain on the surface of formed components. A typical mapping technique applied in profile forming of thermoplastic composites and wood-veneer composites is grid strain analysis [5,[15][16][17]. Because this method requires geometric continuity (i.e.…”

Forming limits for the bulk forming of solid wood

“…The forming limit diagram is commonly used in industrial sheet metal forming Zhang and Duncan 1990;Martin et al 1992;Christie et al 1996) to diagnose and correct failures in the forming of sheet metal, including the selection of alternative materials and lubricants or the modification of the tool used. During bulk forming of wood, the specimen surface develops non-uniform strains, which may lead to fractures in the material.…”

Sheet Forming Studies using Low-cost Composites

“…As mentioned by Martin et al [23], the matrix viscosity is also a key parameter for forming operations. As temperature and viscosity for the present case are inversely proportional, an increase on temperature will cause a decrease on viscosity.…”

“…By considering all facts listed before, it is possible to conclude that even though the composite was made of recycled materials, its behavior under stamping operations is similar to those made of virgin materials. Moreover, all four stress fields could be detected by using the methodology proposed by Martin et al [23].…”

“…pure shear, simple tension, plain strain tension, and biaxial tension. Martin et al [23] suggested that to be able to cover all these fields the blanks' width must change. The variation used in this paper is listed in Table 1.…”