Device and method for controlling transverse and longitudinal stress waves during curing process of energetic composite materials

Patent metadata

Field	Value
Publication number	US-11745396-B2
Application number	US-202117188171-A
Country	US
Kind code	B2
Filing date	Mar 1, 2021
Priority date	Mar 16, 2020
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

The present application relates to the technical field of the research on energetic composite materials, and in particular to a device and a method for controlling transverse and longitudinal stress waves during the curing process of energetic composite materials. The device for controlling transverse and longitudinal stress waves comprises a curing vessel containing an energetic composite materials to be cured; a vertical exciter that is vertically incident to the curing vessel; and a plurality of oblique exciters which are arranged around the vertical exciter and obliquely incident to the curing vessel, wherein the oblique exciters have inclination angles between a first critical angle and a second critical angle. By means of incident transverse and longitudinal waves, the internal radial residual stress and the internal axial residual stress are reduced and homogenized, so as to improve stability and mechanical property of the energetic composite materials during curing.

First claim

The invention claimed is:

1. A device for controlling transverse and longitudinal stress waves during the curing process of energetic composite materials, comprising:
a curing vessel containing energetic composite materials to be cured;
a vertical exciter that is vertically incident to the curing vessel; and
a plurality of oblique exciters arranged around the vertical exciter and obliquely incident to the curing vessel, wherein the oblique exciters have inclination angles between a first critical angle and a second critical angle and emit ultrasonic stress waves to reduce and homogenize axial residual stress and radial residual stress of the energetic composite materials and
wherein an incident angle corresponding to a refraction angle of 90 degrees is the first critical angle, and
a refraction angle corresponding to an incident angle of 0 degrees is the second critical angle.

2. The device for controlling transverse and longitudinal stress waves according to claim 1 , wherein a transmitting end of the vertical exciter and transmitting ends of the plurality of oblique exciters are combined into an integrated transmitting end.

3. The device for controlling transverse and longitudinal stress waves according to claim 2 , wherein
the integrated transmitting end is provided with a first acoustic wedge that is vertically incident and a plurality of second acoustic wedges that are obliquely incident, and
the first acoustic wedge is correspondingly coupled with the transmitting end of the vertical exciter, and the second acoustic wedges are correspondingly coupled with the transmitting ends of the oblique exciters.

4. The device for controlling transverse and longitudinal stress wave according to claim 3 , wherein
the first acoustic wedge is arranged at a central position of the integrated transmitting end, and the second acoustic wedges are uniformly arranged around the first acoustic wedge.

5. The device for controlling transverse and longitudinal stress waves according to claim 2 , wherein
a top of the curing vessel is coupled with the integrated transmitting end, and
the vertical exciter is arranged corresponding to a central position of the top of the curing vessel, and the oblique exciters are uniformly arranged around the vertical exciter.

6. The device for controlling transverse and longitudinal stress waves according to claim 5 , wherein
one vertical exciter is provided and arranged corresponding to the central position of the top of the curing vessel, and three oblique exciters are provided and arranged uniformly around the one vertical exciter.

7. The device for controlling transverse and longitudinal stress waves according to claim 5 , wherein
a plurality of vertical exciters are provided and uniformly distributed corresponding to the central position of the top of the curing vessel.

8. The device for controlling transverse and longitudinal stress waves according to claim 2 , wherein
the curing vessel has a tank structure, and an edge of the integrated transmitting end is fixedly connected with a top edge of the curing vessel.

9. The device for controlling transverse and longitudinal stress waves according to claim 1 , wherein the oblique exciters have the same or different inclination angles.

10. The device for controlling transverse and longitudinal stress waves according to claim 1 , wherein
an inner wall surface of the curing vessel is uniformly coated with a release agent.

Assignees

• Beijing Institute Tech

Inventors

• Xu Chunguang
• Yin Peng
• Lu Yuren
• Song Jianfeng
• Song Wenyuan
• Li shuangyi

Classifications

• B29C35/0261 Primary

  using ultrasonic or sonic vibrations · CPC title

• B29C35/0227

  using pressure vessels, e.g. autoclaves, vulcanising pans (B29C35/065 takes precedence) · CPC title

• C06B21/0091 Primary

  Elimination of undesirable or temporary components of an intermediate or finished product, e.g. making porous or low density products, purifying, stabilising, drying; Deactivating; Reclaiming; (porous inert particles or chemicals compounded for these purposes C06B23/00) · CPC title