Abstract:
A processing apparatus such as a heating and/or debulking apparatus that may be used to debulk a plurality of uncured composite layers to form an article such as an aircraft component may include a plurality of interconnected smart susceptor heater blankets. The plurality of smart susceptor heater blankets may be connected in series or in parallel, and may be controlled to uniformly heat the component during formation.
Abstract:
Embodiments of the presently disclosed system include a thin thermoplastic or thermosetting polymer film loaded with non-polymeric inclusions that are susceptible to heating under a time-varying magnetic field. Insertion of this additional heating layer into a structural or semi-structural heterogeneous laminate provides an “on-demand” de-bonding site for laminate deconstruction. For example, in some embodiments when the heating layer is inserted between a cured Carbon-Fiber Reinforced Plastic (CFRP) layer and a Polymeric/Metallic film stackup layer, the heating layer can be selectively heated above its softening point (e.g., by using energy absorbed from a locally-applied time-varying magnetic field) to allow for ease of applique separation from the CFRP layer.
Abstract:
A system and method for operating an ice detection and deicing system are provided herein. The ice detection and deicing system may use changing magnetic properties of various components caused by temperature changes to detect conditions conducive to, or indicating, ice formation. The ice detection and deicing system may further use eddy currents induced in one or more layers of the system to increase the temperature of the one or more layers to reduce the amount of ice formation or reduce the probability of ice being formed.
Abstract:
A tester for bonded composite materials uses a magnetic source to generate a response signal from wires infused in an adhesive used between layers of the composite material. Acoustic or magnetic response signals, separately or in combination, can be received and analyzed to detect stresses in wires indicative of voids in the adhesive or other defects affecting the bond quality between layers of the composite material.
Abstract:
A heating system includes a structure to be heated, and a heating apparatus disposed to heat the structure. The heating apparatus includes a housing member, a plurality of resonant frequency power sources, and a plurality of associated controls. The plurality of resonant frequency power sources are attached to the housing member. The plurality of associated controllers is configured to separately operate the plurality of resonant frequency power sources at resonant frequencies matching heating requirements of the structure.
Abstract:
A heating blanket is disclosed. The heating blanket may include a conductor yarn configured to receive electrical current and generate a magnetic field in response to the electrical current, and a plurality of susceptor yarns composed of a magnetic material including a Curie point. The conductor yarn and the plurality of susceptor yarns may be interlaced to form a layer of fabric.
Abstract:
A method for fabricating a thermoplastic composite component comprises inductively heating a thermoplastic pre-form with a first induction coil by inducing current to flow in susceptor wires disposed throughout the pre-form, inductively heating smart susceptors in a molding tool to a leveling temperature with a second induction coil by applying a high-strength magnetic field having a magnetic flux that passes through surfaces of the smart susceptors, shaping the magnetic flux that passes through surfaces of the smart susceptors to flow substantially parallel to a molding surface of the smart susceptors, placing the heated pre-form between the heated smart susceptors; and applying molding pressure to the pre-form to form the composite component.
Abstract:
A heating system includes a structure to be heated, and a heating apparatus disposed to heat the structure. The heating apparatus includes a housing member, a plurality of resonant frequency power sources, and a plurality of associated controls. The plurality of resonant frequency power sources are attached to the housing member. The plurality of associated controllers is configured to separately operate the plurality of resonant frequency power sources at resonant frequencies matching heating requirements of the structure.
Abstract:
An induction heating system employs a ferromagnetic susceptor mounted proximate an exterior of flight surface of an aircraft. At least one electrically conductive coil is mounted proximate the ferromagnetic susceptor. The at least one electrically conductive coil is powered by a first power source with a first frequency. At least one compensating coil is mounted proximate the ferromagnetic susceptor having a geometry determined to provide substantially net-zero flux with respect to the at least one electrically conductive coil and positioned to induce induction heating where the first plurality of electrically conductive coils lacks induced inductive heating coverage. The at least one compensating coils is powered by a second AC power source with a second frequency.
Abstract:
A processing apparatus such as a heating and/or debulking apparatus that may be used to debulk a plurality of uncured composite layers to form an article such as an aircraft component may include a plurality of interconnected smart susceptor heater blankets. The plurality of smart susceptor heater blankets may be connected in series or in parallel, and may be controlled to uniformly heat the component during formation.