How to Handle the Thickness of GRC Components at Corners? Qinglong GRC Structural Design Technology for Special Parts

The thickness treatment at the corner sections of GRC components directly affects their structural safety and durability. Based on mechanical performance requirements and process feasibility, Qinglong GRC has developed a corner thickness design system guided by equal-strength design principles and stress distribution optimization.

In the design of a lotus-shaped column capital (corner radius R=50mm) at a cultural plaza in Suzhou, finite element analysis revealed that the stress concentration factor at a right-angle corner reached 3.8, while after adopting a variable thickness design (flange thickness of 20mm, gradually increasing to 35mm at the corner), the stress concentration dropped to 1.8. Actual production adopted a patented gradient mold technology, keeping the thickness transition zone length within 150mm, and the component was verified through 2 million cycles of fatigue testing.

Mechanical Performance Optimization Design

Minimum corner radius ≥ component thickness; thickness in stress concentration zones increased by 30%-50%; thickness variation slope ≤ 1:5. Through ANSYS software optimization, the stress concentration factor is controlled below 2.0.

Production Process Implementation

CNC-machined gradient molds are used; the sprayer's trajectory is adjusted during spraying; thickness control points are set (spacing ≤ 100mm). These processes ensure thickness accuracy with an error ≤ 1.5mm.

Durability Enhancement Measures

Corner cover thickness increased by 5mm; fiber content increased by 0.5%; drip lines installed for stain prevention. These measures extend the service life of corner sections by 30%.

Special Shape Treatment Techniques

Acute corners (<90°) use stiffening ribs; obtuse corners have embedded reinforcement mesh; curved corners adopt equal thickness design. A corner shape database has been established to achieve standardized treatment.

Corner thickness requires refined design. Qinglong GRC's corner treatment technology has been applied to hundreds of irregular-shaped projects, reducing the corner cracking complaint rate to below 0.1%.