{{ post.title }} 글 편집 Author {{ post.author.name }} Posted on

ㆍ Product: Stacking corrugated box on pallet

ㆍ Analysis Goal: Measures to prevent abrasion damage and load collapse stacked on pallet during transportation and storage

    PDF File Download (Click)

Corrugated boxes are commonly used to pack electronic products and consumers goods for transportation.

Corrugated boxes are often stacked on pallets during transportation and storage. Vibration during transportation or earthquakes of stacked boxes on pallets can cause collapse due to box contact. Vibration tables are often used for the evaluation of box performance. Industry standards for vertical vibration testing also exist, but recently, 3 degree-of-freedom vibration testing which includes pitch and roll has become popular.

Here, stacked corrugated boxes on a 3-DOF vibration table was modeled in RecurDyn. 3-DOF motion of the vibration table was modeled using RecurDyn actuators. The contact, rubbing, and collapse caused by roll and pitch motions was simulated.

Process

① Create RecurDyn model of 3-DOF vibration table that supports vertical, roll and pitch motion.

② Create RecurDyn model of stacked corrugated boxes on pallet.

③ Create Geo contacts between pallet and corrugated boxes and between boxes.

④ Create body to represent the film to prevent stacked boxes from collapsing.

⑤ Apply motion to actuators of 3-DOF vibration table to generate vertical, roll, and pitch motions.

Key Technologies for Analysis

• Joints between components to accurately reproduce the pitch and roll behavior of a 3-DOF vibration tester

• Kinematic model to apply prescribed vibration independent of the stack mass

• Model technique to mimic collapse prevention film

Toolkits

ㆍRecurDyn/Professional

Customer Challenges

• Characters printed on corrugated boxes stacked on pallets disappear during transportation, suspected to be due to rubbing.

• Stacked boxes sometimes collapse during transportation.

• The vibration of cargo during truck transportation cannot be accurately reproduced by 1-DOF vibration tables.

• Testing with physical vibration tables requires too much time and cost.

Solutions

• 3-DOF Vibration table testing environment loaded with stacked corrugated boxes was reproduced in RecurDyn.

• Contacts between corrugated boxes and vibration table were modeled with Geo contact.

• The collapse prevention wrapping film was simulated with a low contact stiffness.

Outcomes

• The roll and pitch motions were accurately reproduced in the RecurDyn model by modeling the actuator displacements.

• Corrugated boxes penetrating through the film and stack collapse was accurately simulated.

• Contact forces between boxes, which is believed to be the source of rubbing, were reasonably predicted.

Other Applications

◀ Impact damage evaluation

ㆍDamage of product inside of package

ㆍDamage of corrugated box