公开(公告)号：CA2983955C

公开(公告)日：2020-10-27

申请号：CA2983955

申请日：2017-10-25

Applicant: BELL HELICOPTER TEXTRON INC

Inventor： BURNETT MICHAEL ,  LEE WEI-YUEH ,  DEARMAN MICHAEL

IPC: B29C70/32

Abstract: In a first aspect, there is a method of making a specimen with a predetermined wrinkle defect, the steps including orienting a composite material around a layup tool at a wrap angle to form a closed loop; and generating at least one wrinkle with a predetermined characteristic in a portion of the closed loop to form a specimen. The predetermined characteristic is at least one of the following: wrinkle location, an outward wrinkle, an inward wrinkle, a wrinkle width, a wrinkle height, and a wrinkle length. In another aspect, there is a method of determining allowable defects for a composite component.

公开(公告)号：CA2983956C

公开(公告)日：2020-08-04

申请号：CA2983956

申请日：2017-10-25

Applicant: BELL HELICOPTER TEXTRON INC

Inventor： LEE WEI-YUEH ,  BURNETT MICHAEL ,  DEARMAN MICHAEL

IPC: B29C70/32

Abstract: There is a method of making a tubular specimen with a predetermined wrinkle defect including providing a layup tool with a cavity forming member having a cavity which resembles a desired shape of the at least one wrinkle; orienting a composite material around the mandrel at a wrap angle to form a closed loop; positioning a wrinkle tool on the closed loop; and/or generating at least one wrinkle with a predetermined characteristic in a portion of the closed loop to form a tubular specimen. The predetermined characteristic is at least one of the following: wrinkle location, an outward wrinkle, an inward wrinkle, a wrinkle width, a wrinkle height, and a wrinkle length. In another aspect, there is a method of offset load testing a tubular composite specimen. In a third aspect, there is a method of determining allowable defects for a composite component.

公开(公告)号：CA2967974C

公开(公告)日：2019-06-04

申请号：CA2967974

申请日：2017-05-18

Applicant: BELL HELICOPTER TEXTRON INC

Inventor： FOSKEY CHRISTOPHER ,  BURNETT MICHAEL ,  BOSWORTH JEFFREY ,  PAULSON JARED ,  MCINTYRE JOEL ,  OLDROYD PAUL K

IPC: B64C27/28 ,  B64C11/26 ,  B64C27/473

Abstract: A tiltrotor aircraft includes a fuselage, a wing member extending from the fuselage, an engine disposed relative to the wing member and a proprotor mechanically coupled to the engine. The proprotor includes a plurality of proprotor blade assemblies each including a spar and a sheath extending spanwise along the spar forming the leading edge of the proprotor blade assembly. The spar has a root section, a main section and a tip section. The spar has a generally oval cross section at radial stations along the main section and a first edge having a structural bias relative to a generally oppositely disposed second edge at the radial stations along the main section.

公开(公告)号：CA2983955A1

公开(公告)日：2018-09-21

申请号：CA2983955

申请日：2017-10-25

Applicant: BELL HELICOPTER TEXTRON INC

Inventor： BURNETT MICHAEL ,  LEE WEI-YUEH ,  DEARMAN MICHAEL

IPC: B29C70/32

Abstract: In a first aspect, there is a method of making a specimen with a predetermined wrinkle defect, the steps including orienting a composite material around a layup tool at a wrap angle to form a closed loop; and generating at least one wrinkle with a predetermined characteristic in a portion of the closed loop to form a specimen. The predetermined characteristic is at least one of the following: wrinkle location, an outward wrinkle, an inward wrinkle, a wrinkle width, a wrinkle height, and a wrinkle length. In another aspect, there is a method of determining allowable defects for a composite component.

公开(公告)号：CA2983956A1

公开(公告)日：2018-09-21

申请号：CA2983956

申请日：2017-10-25

Applicant: BELL HELICOPTER TEXTRON INC

Inventor： LEE WEI-YUEH ,  BURNETT MICHAEL ,  DEARMAN MICHAEL

IPC: B29C70/32

Abstract: There is a method of making a tubular specimen with a predetermined wrinkle defect including providing a layup tool with a cavity forming member having a cavity which resembles a desired shape of the at least one wrinkle; orienting a composite material around the mandrel at a wrap angle to form a closed loop; positioning a wrinkle tool on the closed loop; and/or generating at least one wrinkle with a predetermined characteristic in a portion of the closed loop to form a tubular specimen. The predetermined characteristic is at least one of the following: wrinkle location, an outward wrinkle, an inward wrinkle, a wrinkle width, a wrinkle height, and a wrinkle length. In another aspect, there is a method of offset load testing a tubular composite specimen. In a third aspect, there is a method of determining allowable defects for a composite component.

公开(公告)号：CA2967974A1

公开(公告)日：2017-11-21

申请号：CA2967974

申请日：2017-05-18

Applicant: BELL HELICOPTER TEXTRON INC

Inventor： FOSKEY CHRISTOPHER ,  BURNETT MICHAEL ,  BOSWORTH JEFFREY ,  PAULSON JARED ,  MCINTYRE JOEL ,  OLDROYD PAUL K

IPC: B64C27/28 ,  B64C11/26 ,  B64C27/473

Abstract: A tiltrotor aircraft includes a fuselage, a wing member extending from the fuselage, an engine disposed relative to the wing member and a proprotor mechanically coupled to the engine. The proprotor includes a plurality of proprotor blade assemblies each including a spar and a sheath extending spanwise along the spar forming the leading edge of the proprotor blade assembly. The spar has a root section, a main section and a tip section. The spar has a generally oval cross section at radial stations along the main section and a first edge having a structural bias relative to a generally oppositely disposed second edge at the radial stations along the main section.