Elastic modulus determination of composite material
AssigneeNECCorporation
InventorYohsuke Watanabe
Life of this patent
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Abstract
An elastic modulus of an element of a material including fibers in a selected direction is determined as follows. First, a parallel elastic modulus, an orthogonal elastic modulus and fiber orientation of the material are stored. The elastic modulus of the element is determined based on the first elastic modulus, the second elastic modulus and an angle between the fiber orientation of the element and the selected direction such that the elastic modulus is determined as a function of the angle between the fiber orientation of the element and the selected direction when the selected direction is neither parallel nor orthogonal to the fiber orientation of the element.
Claims20
An electronic computer system for determining an elastic modulus of each element of a plurality of elements representing a material including fibers, comprising:
- an input device for inputting a first elastic modulus and a second elastic modulus, the first elastic modulus being an elastic modulus of the material in a direction parallel to the fiber orientation, the second elastic modulus being an elastic modulus of the material in a direction orthogonal to the fiber orientation;
- a data memory for storing fiber orientation of each element of the material;
- and
- a processor for determining the elastic modulus of each element based on the first elastic modulus, the second elastic modulus and an angle between the fiber orientation of the element and a desired loading direction.
An electronic computer implemented method for determining an elastic modulus of each element of a plurality of elements representing a material including fibers, comprising the steps of:
- storing fiber orientation of each element of the material;
- inputting a first elastic modulus and a second elastic modulus, the first elastic modulus being an elastic modulus of the material in a direction parallel to the fiber orientation, the second elastic modulus being an elastic modulus of the material in a direction orthogonal to the fiber orientation;
- selecting a reference direction;
- and
- determining the elastic modulus of each element so that the first elastic modulus is determined as the elastic modulus of the element when the reference direction is parallel to the fiber orientation of the element, the second elastic modulus is determined as the elastic modulus of the element when the reference direction is orthogonal to the fiber orientation of the element, and the elastic modulus of the element is determined as a function of the angle between the fiber orientation of the element and the reference direction when the desired direction is neither parallel nor orthogonal to the fiber orientation of the element.
A electronic computer memory storing a program for determining an elastic modulus of each element of a plurality of elements representing a material including fibers, the program comprising the steps of:
- storing fiber orientation of each element of the material;
- inputting a first elastic modulus and a second elastic modulus, the first elastic modulus being an elastic modulus of the material in a direction parallel to the fiber orientation, the second elastic modulus being an elastic modulus of the material in a direction orthogonal to the fiber orientation;
- selecting a reference direction;
- and
- determining the elastic modulus of each element so that the first elastic modulus is determined as the elastic modulus of the element when the reference direction is parallel to the fiber orientation of the element, the second elastic modulus is determined as the elastic modulus of the element when the reference direction is orthogonal to the fiber orientation of the element, and the elastic modulus of the element is determined as a function of the angle between the fiber orientation of the element and the reference direction when the desired direction is neither parallel nor orthogonal to the fiber orientation of the element.
An electronic computer system for determining an elastic modulus of each element of a plurality of elements representing a material including fibers in a desired direction, comprising:
- means for representing a fiber orientation of each element;
- and
- means for determining the elastic modulus of each element based on a first elastic modulus, a second elastic modulus and an angle between the fiber orientation of the element and the desired direction, the first elastic modulus being an elastic modulus of the material in a direction parallel to the fiber orientation, the second elastic modulus being an elastic modulus of the material in a direction orthogonal to the fiber orientation.
Dependencies are inferred from the claim text.