Adjustable Rock Shear Test Clamp With Dynamic Gap Control

The clamp structure is transformed from a fixed static design to a dynamic adjustable design. The clamping blocks are made movable along the shear box walls through guide grooves, allowing the clamping gap to be dynamically adjusted during the test process to eliminate gaps between the sample and shear box in real-time

The clamp is divided into multiple independent clamping blocks (first clamping block, second clamping block, third clamping block, fourth clamping block) that can move independently along the shear box walls. This segmentation allows flexible adjustment of the clamping gap while maintaining structural simplicity

The clamp structure enables the sample to actively participate in the gap elimination process. During shear testing, as the sample deforms and closes the initial gap, the clamping blocks automatically move along the guide grooves to maintain contact, achieving self-adjustment without external intervention

The guide grooves provide real-time feedback on the sample's deformation state. As the sample closes the gap, it exerts force on the clamping blocks, which move along the grooves to maintain optimal clamping contact, creating a feedback mechanism that automatically adjusts clamping stability

Guide grooves are introduced as an intermediary element between the clamping blocks and the shear box walls. These grooves constrain the movement of clamping blocks to a specific path, enabling precise gap control through a simple geometric constraint rather than a complex adjustment mechanism

The clamping gap parameter is made variable during the test process. The clamping blocks can change their position along the shear box walls by moving along the guide grooves, allowing the gap distance parameter to be dynamically adjusted according to sample deformation