RELAXATION MODULUS SENSOR, STRUCTURE INCORPORATING SAME, AND METHOD FOR USE OF SAME
First Claim
1. A sensor for measuring relaxation modulus in a test material, comprising:
- a frame having an opening therethrough;
a driver mounted within the opening of the frame;
a first sensing device in communication with the driver; and
a second sensing device disposed within a gap between the driver and the frame.
11 Assignments
0 Petitions
Accused Products
Abstract
A sensor for measuring material properties such as the relaxation modulus of a material in situ and a method of measuring material properties of a material are disclosed. The sensor may be substantially embedded in the material, and includes a deformable driver. When actuated, the deformable driver may create a stress in the adjacent material. The movement or deformation of the driver may be measured with a sensing device, for example a strain gage mounted on a surface thereof. The stress in the adjacent material may be measured with a second sensing device, for example a pressure sensor. The measured movement and stress over a predetermined period of time may he used to determine the relaxation modulus of the material.
18 Citations
31 Claims
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1. A sensor for measuring relaxation modulus in a test material, comprising:
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a frame having an opening therethrough; a driver mounted within the opening of the frame; a first sensing device in communication with the driver; and a second sensing device disposed within a gap between the driver and the frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for measuring relaxation modulus in a test material comprising:
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providing a sensor comprising at least one deformable driver; embedding the sensor in the test material; actuating the at least one deformable driver with a stimulus to create a stress in the test material; and sensing the stress in the test material. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A sensor for measuring relaxation modulus in a test material, comprising:
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a driver comprising deformable material embedded in the test material; a first sensing device in communication with the deformable material; and a second sensing device positioned adjacent the deformable material and in communication with the test material. - View Dependent Claims (27, 28, 29, 30)
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31. A rocket motor, comprising:
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a propellant; a liner at least partially surrounding the propellant; and a sensor substantially embedded in the liner, the sensor comprising; a frame having an opening therethrough; a driver mounted within the opening of the frame; a first sensing device in communication with the driver; and a second sensing device disposed within a gap formed between the driver and the frame.
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Specification