2017年8月1日 · In this paper, the role of interface fiber angle on the bridging traction of double cantilever beam (DCB) specimens is investigated experimentally. In…

1999年2月1日 · The analysis treats the DCB specimen as two Bernoulli–Euler-type laminate beams joined at the mid-plane by a Winkler-type elastic foundation to accomodate transverse elasticity of the uncracked region of the specimen. An experimental study was conducted on glass/polyester quasi-unidirectional and angle-ply laminate DCB specimens.

2016年12月1日 · In this study, the effect of interface fiber angle on the R-curve behavior of double cantilever beam (DCB) specimens made of E-glass/epoxy under mode …

2023年10月4日 · As for ∡DBC ∡ D B C and ∡DCB ∡ D C B, observe that PQD P Q D is equilateral by construction. Hence QCD Q C D is isosceles, and angle chasing yields ∡DCQ = 50∘ ∡ D C Q = 50 ∘.

湖南省沅江市第一中学 王习波 刘益 解：（1）在∆ADB中，由正弦定理得： \frac {AD} {BD}=\frac {sin\angle (ABD)} {sin?};在∆BDC中，由正弦定理得： \frac {BD} {CD}=\frac {sin\angle (DCB)} {sin\angle (DBC)};在∆CDA中…

Abstract In this paper, the role of interface fiber angle on the bridging traction of double cantilever beam (DCB) specimens is investigated experimentally. In order to eliminate the effect of the remote ply orientation on the bridging traction during delamination initiation and propagation, DCB specimens with stacking sequences of [0 11 /θ//0 12 ] where θ …

2021年11月3日 · Where ∠A =84∘, ∠ACD = 42∘, BD = AC, find ∠BCD. Wonder if there is solution without using trigonometric functions. I tried with getting circumcenter of triangle ABC, but seems hard to prove it forms an equilateral triangle with side AC. Also if trying from equilateral and form an Isosceles triangle with two angles of 24∘, and then …

2022年2月28日 · Set Up Equations: If you denote the measure of angle DCB as (4x - 1) and ADC as (3y + 7), you can set up equations based on the relationships and properties of lines and triangles. Use Angle Relationships: If angles ACD and ABD are inscribed angles in the same segment of the circle, they are congruent.

2020年12月4日 · In the following figure, AD = AB A D = A B. Also ∠DAB = ∠DCB = ∠AEC =90∘ ∠ D A B = ∠ D C B = ∠ A E C = 90 ∘ and AE = 5 A E = 5. Find the area of quadrilateral ABCD A B C D. What I Tried: Here is the figure :- I could conclude that ABCD A B C D is cyclic, but I really could not use that property in a useful way till now.

2025年3月8日 · To address the issues and determine the mode-I fracture toughness at different interface angles, DCB tests on carbon fiber epoxy matrix laminates with various interface angles were first performed. A new method for measuring delamination crack length is proposed, based on the grayscale correlation function of subsets in the DIC method.