US 2024/0427952 A1Published application

System and Method for Predicting Strength of Multi-Layered Material

AssigneeLG Chem, Ltd.

InventorsSung Nam Moon, Hyun Tae Kim, Sang Jin Jeon, Jin Mi Jung, Jin Uk Choi, Dam Hyeok Im

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Abstract

A strength prediction system for a multilayer material with n films stacked includes an input portion where one or more values are entered. The values include the elastic modulus of each layer, Poisson's ratio, Young's modulus, thickness, stacking angle, principal stress direction strength, and the total thickness of the multilayer material. The strength prediction system also includes a control portion that calculates the strength of a multilayer material by applying the values entered in the input portion, a display connected to the control portion, and a storage portion connected to the control portion. The control portion defines a strength value of a multilayer material. A method for predicting the strength of a multilayer material having two or more films stacked thereto is also provided.

Claims10

Dependent claims

A strength prediction system for a multilayer material with n films stacked, wherein n is an integer greater than or equal to 2, comprising:

an input portion configured to accept one or more values;
wherein the values include an elastic modulus of each layer, a Poisson's ratio, a Young's modulus, a thickness, a stacking angle, a principal stress direction strength, and a total thickness of a multilayer material;
a control portion configured to calculates a strength of a multilayer material by applying the values entered in the input portion;
a display connected to the control portion;
and
a storage portion connected to the control portion,
wherein the control portion is configured to perform a cycle including:
(a) calculating a stress of each layer based on the values entered in the input portion,
(b) applying each layer's stacking angle to the stress in each layer to convert them to a principal direction stress of each layer,
(c) configuring the separately entered principal stress direction strength of each layer as a strength discrimination parameter that determines the strength of a multilayer material,
(d) combining the principal direction stress and the strength discrimination parameter of each layer to calculate a safety coefficient of each layer, and
wherein the control portion is configured to extracts a smallest value among the safety coefficients of each calculated layer and defines the smallest value as a strength value of a multilayer material.

9 more elements

A strength prediction method for a multilayer material with n films stacked, wherein n is an integer greater than or equal to 2, comprising:

(a) calculating a stress of each layer by entering one or more of the following values:
an elastic modulus, a Poisson's ratio, a shear modulus, a thickness, a stacking angle, and a total thickness of a multilayer material;
(b) applying a stacking angle of each layer to the calculated stresses of each layer to convert it to a principal direction stress;
(c) configuring a separately entered principal stress direction strength of each layer as a strength discrimination parameters that determines a strength of the multilayer material;
(d) calculating a safety coefficient of each layer by combining the principal direction stress and the strength discrimination parameter of each layer;
and
extracting a smallest value among the safety coefficients of each calculated layer and defining the smallest value as a strength value of the multilayer material.

4 more elements

Dependencies are inferred from the claim text.